CRC · California Residential Code
What masonry standards (TMS/other) are referenced for masonry design and sound transmission?
For masonry party walls in the California Residential Code Appendix BG you must achieve an STC of at least 45; the code lets you either calculate masonry STC using the TMS method (TMS 0302 / TMS 302) or show an ASTM E90 lab test. Masonry materials and structural design are governed by the CRC masonry section, which points to TMS design manuals and ASTM unit/mortar standards (e.g., ASTM C90 for CMU). For project submittals use either the TMS calculation or an ASTM E90 report and document how penetrations are sealed to preserve the rating.
Last reviewed: July 6, 2026
What the code requires — 2-4 sentences
- The CRC Appendix BG requires that airborne sound insulation between dwelling units meet STC 45 (or NNIC 42) and that the sound transmission class (STC) of concrete masonry and clay masonry assemblies be either calculated using TMS 0302 or determined by laboratory testing in accordance with ASTM E90 — see § BG102.1 and § BG102.1.1.
- For masonry design (materials and structural rules), the CRC references the TMS design manuals (for example TMS 402, TMS 403, TMS 404) and specific ASTM unit and mortar standards in § R606.
The single most important point: for masonry partitions between dwelling units you must either produce an ASTM E90 lab test showing the assembly’s STC, or calculate the STC using the TMS method referenced in the code — § BG102.1.1.
Requirements in detail
Airborne sound (masonry)
- Required performance: STC 45 where tested per ASTM E90, or equivalent NNIC/NNIC values where allowed by the section. See § BG102.1.
- Masonry-specific path: the code explicitly allows the STC for concrete and clay masonry assemblies to be calculated per TMS 0302 or determined by test per ASTM E90 — see § BG102.1.1. (Note: the Appendix BG referenced-standards table lists TMS 302—2018 as the Standard for determining STC for masonry assemblies.)
Decision-relevant table (quick reference)
| Decision / value | What to use | Code Reference |
|---|---|---|
| Required airborne rating (Appendix BG) | STC 45 | § BG102.1 |
| Masonry STC method options | Calculate per TMS 0302 or test per ASTM E90 | § BG102.1.1 |
| Tests for airborne sound in BG table | ASTM E90 (lab) and ASTM E336 (field) | § BG104.1 / Table BG104.1 |
| Masonry structural design manuals referenced | TMS 402, TMS 403, TMS 404 (design & construction) | § R606.1 |
| Unit and mortar standards cited | ASTM list for CMU, clay units, mortar (e.g., ASTM C90, ASTM C62, ASTM C270) | § R606.2 |
Masonry design standards (materials & structural)
- The CRC directs masonry design and construction to be performed in accordance with the TMS design documents as allowed by § R606.1 (references TMS 402, TMS 403, TMS 404).
- Material specifications for masonry units and mortar are listed explicitly (for example ASTM C90 for load‑bearing concrete masonry units, ASTM C62 for building brick, and ASTM C270 for mortar) in § R606.2. Use those ASTM standards for selecting/accepting units and mortars.
Interaction with the California Building Code (CBC)
- The CBC contains similar/related sound provisions (e.g., § 1206.2.1 mirrors the masonry-STC requirement and also references TMS 302 or ASTM E90). If your project also must comply with the CBC, follow the CBC section too.
Exceptions & special cases
- Appendix BG is an appendix: its provisions are not mandatory unless adopted by the enforcing agency or referenced in the adopting ordinance. Check whether Appendix BG is adopted for your project jurisdiction. See the Appendix preface.
- The CRC text you provided does not include a retrievable copy of § R608.1 in the uploaded files. I could not locate § R608.1 in the supplied CRC file set; if you need requirements from § R608.1, please upload that section or confirm the desired edition so I can cite it directly. (There are many R608 subsections in the file set — e.g., connection and reinforcement details — but R608.1 itself was not present in the retrieved excerpts.)
Common mistakes
- Confusing which STC threshold applies: the CBC Section 1206 allows STC 50 in some contexts, while Appendix BG in the CRC uses STC 45 for dwelling units in the appendix — always cite the exact section adopted for your project.
- Assuming unit standards (ASTM C90 / C62) guarantee acoustic compliance. Unit material ASTM compliance covers physical/material properties, not the assembled STC of a partition — the STC must be calculated per TMS or demonstrated by ASTM E90 testing.
- Forgetting to treat openings/penetrations: § BG102.1 requires that penetrations or openings (piping, electrical devices, soffits, ducts, etc.) be sealed, lined, insulated or otherwise treated to maintain the rating — leaving penetrations untreated will reduce the effective STC.
Worked example — applying § BG102.1.1 (concrete-masonry party wall)
Scenario: You are designing a common wall between two apartment units using an 8‑in CMU wall with a finished gypsum layer on each side. The jurisdiction enforces Appendix BG (CRC) and requires compliance with § BG102.1/§ BG102.1.1.
Steps:
- Decide compliance route allowed by § BG102.1.1:
- Option A — laboratory test: obtain an ASTM E90 laboratory report for the exact assembly showing the measured STC. If the report shows STC ≥ 45, the assembly complies.
- Option B — calculation: use the TMS masonry STC calculation method (TMS 0302/TMS 302) to calculate the assembly STC. If the TMS calculation yields STC ≥ 45, the assembly complies.
- Example using the test route (concrete example numbers): you contract an acoustical lab to test the exact wall assembly per ASTM E90. The lab issues a report: STC = 48. Because 48 ≥ 45, the wall assembly meets § BG102.1 (Appendix BG requirement). Cite and include the ASTM E90 report in your submittal.
- Remember to document how penetrations are treated (seals, gaskets, mineral wool, backer rod + sealant) because § BG102.1 requires those measures to maintain the rated performance.
What I could not do from your uploaded files: show the internal steps, equations or frequency-by-frequency data required by TMS 302/0302 to compute STC — the TMS standard text itself was not in the uploaded files. If you want a sample TMS calculation, I’ll need either the TMS 302 procedures or permission to reference that standard directly.
Related provisions (quick list)
- § BG102.1 — Airborne sound insulation requirements (STC/NNIC thresholds).
- § BG102.1.1 — Masonry: STC calculated per TMS 0302 or tested per ASTM E90.
- § BG103.1 — Impact/structural-borne sound (IIC / NISR thresholds) for floor‑ceiling assemblies in Appendix BG.
- § BG104.1 / Table BG104.1 — Appendix BG referenced standards (lists ASTM E90, E336, E492, E1007, TMS 302).
- § R606.1 — Masonry construction shall be designed in accordance with TMS 402, TMS 403 or TMS 404.
- § R606.2 — Material standards for concrete and clay masonry units and mortar (ASTM citations).
- (CBC) § 1206.2.1 — CBC provision that parallels masonry STC rules; references TMS 302 / ASTM E90 (useful when both CRC and CBC apply).
If you want, I can:
- Pull the exact Appendix BG paragraphs and place them in a code‑ready submittal checklist (including the precise text and the required test/reporting items), or
- Draft a short submittal template for an acoustical lab report and a TMS‑calculation report that will satisfy § BG102.1.1 and the building official.
Code references
Grounded in the retrieved California Residential Code — click a citation to read the verbatim passage:
CRC § 1.1 High relevance — show source text
1—REFERENCED STANDARDS Col2 Col3 STANDARD
ACRONYMSTANDARD NAME SECTIONS
HEREIN
REFERENCEDASTM E90—09 Test Method for Laboratory Measurement of
Airborne Sound Transmission Loss of Building Partitions and ElementsBG102.1, BG102.1.1 ASTM E336—20 Standard Test Method for Measurement of Airborne Sound Attenuation between Rooms in Buildings BG102.1 ASTM E492—09 Specification for Laboratory Measurement of
Impact Sound Transmission through Floor-ceiling Assemblies Using the Tapping MachineBG103.1 ASTM E1007—21 Standard Test Method for Field Measurement of Tapping Machine
Impact Sound Transmission Through Floor-Ceiling Assemblies and Associated Support StructuresBG103.1 TMS 302—2018 Standard for Determining the Sound Transmission Class Rating for Masonry Assemblies BG102.1.1 2025 CALIFORNIA RESIDENTIAL CODE APPENDIX BG-3
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APPENDIX BG-4 2025 CALIFORNIA RESIDENTIAL CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE
APPENDIX BH – AUTOMATIC VEHICULAR GATES
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC Adopting agency BSC BSC-
CGSFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5 Adopt entire chapter Adopt entire chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowChapter / Section 2025 CALIFORNIA RESIDENTIAL CODE APPENDIX BH-1
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APPENDIX BH-2 2025 CALIFORNIA RESIDENTIAL CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
CRC § 1.1 High relevance — show source text
BG102.1.1 Masonry. The sound transmission class of concrete masonry and clay masonry assemblies shall be calculated in accordance with TMS 0302 or determined through testing in accordance with ASTM E90.
SECTION BG103—STRUCTURAL-BORNE SOUND
BG103.1 General. Floor/ceiling assemblies between dwelling units, or between a dwelling unit and a public or service area within a structure, shall have an impact insulation class (IIC) rating of not less than 45 when tested in accordance with ASTM E492 or a Normalized Impact Sound Rating (NISR) of 42 where tested in accordance with ASTM E1007.
SECTION BG104—REFERENCED STANDARDS
BG104.1 General. See Table BG104.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, the standard title, and the section or sections of this appendix that references the standard.
TABLE BG104.1—REFERENCED STANDARDS Col2 Col3 STANDARD
ACRONYMSTANDARD NAME SECTIONS
HEREIN
REFERENCEDASTM E90—09 Test Method for Laboratory Measurement of
Airborne Sound Transmission Loss of Building Partitions and ElementsBG102.1, BG102.1.1 ASTM E336—20 Standard Test Method for Measurement of Airborne Sound Attenuation between Rooms in Buildings BG102.1 ASTM E492—09 Specification for Laboratory Measurement of
Impact Sound Transmission through Floor-ceiling Assemblies Using the Tapping MachineBG103.1 ASTM E1007—21 Standard Test Method for Field Measurement of Tapping Machine
Impact Sound Transmission Through Floor-Ceiling Assemblies and Associated Support StructuresBG103.1 TMS 302—2018 Standard for Determining the Sound Transmission Class Rating for Masonry Assemblies BG102.1.1 2025 CALIFORNIA RESIDENTIAL CODE APPENDIX BG-3
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APPENDIX BG-4 2025 CALIFORNIA RESIDENTIAL CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE
APPENDIX BH – AUTOMATIC VEHICULAR GATES
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
CRC § 1505.10 High relevance — show source text
1505.10
ANSI/SPRI/FM 4435/ES-1—2017: Test Standard for Edge Systems Used with Low Slope Roofing Systems
1504.6, 1511.7.6.1
35-40 2025 CALIFORNIA BUILDING CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
REFERENCED STANDARDS
SRCC Solar Rating & Certification Corporation, 400 High Point Drive, Suite 400, Cocoa, FL 32926
ICC 900/SRCC 300—2020: Solar Thermal System Standard
3111.2.1
ICC 901/SRCC 100—2020: Solar Thermal Collector Standard
3111.2.1
TIA Telecommunications Industry Association, 1320 N. Courthouse Road #200, Arlington, VA 22201
ANSI/TIA 222-I—2023: Structural Standard for Antenna Supporting Structures, Antennas and Small Wind Turbine Support
Structures
1609.1.1, 3108.1, 3108.2
TMS The Masonry Society, 105 South Sunset Street, Suite Q, Longmont, CO 80501-6172
216—2014(19): Code Requirements for Determining Fire Resistance of Concrete and Masonry Construction Assemblies Table 721.1(2), 722.1
302—2018: Standard Method for Determining the Sound Transmission Ratings for Masonry Assemblies
1208.2.1
402—16: Building Code Requirements for Masonry Structures
2109.1, 2109.1.1, 2109.2
402—2022: Building Code Requirements for Masonry Structures
1404.7, 1404.11, 1413.2.2, 1604.3.4, 1705.4, 1807.1.6.3.2, 1808.9, 2101.2, 2101.2.2, 2101A.1.3, 2104A.1.3, 2103.2.4, 2103A.6, 2104A.1.3.10.2, 2106.1, 2106A, 2107.1, 2107.2, 2107.3, 2107.4, 2107A, 2107.5, 2107.6, 2108.1, 2108.2, 2108.3, 2108.4, 2110.1, 2114.1, 2114.4, 2115.1, 2115.2, 2115.5, 2115.6
403—2017: Direct Design Handbook for Masonry Structures
2101.2
404—2023: Standard for the Design of Architectural Cast Stone
2101.2
504—2023: Standard for the Fabrication of Architectural Cast Stone
2103.1
602—2022: Specification for Masonry Structures
CRC § 12-8 High relevance — show source text
12-8-100: Room Fire Tests for Wall and Ceiling Materials
NA
12-10-1: Power Operated Exit Doors
NA
12-10-2: Single Point Latching or Locking Devices
NA
12-10-3: Emergency Exit and Panic Hardware
NA
(The Office of the State Fire Marshal standards referred to above are found in the California Code of Regulations, Title 24, Part 12.):
SJI Steel Joist Institute, 140 Evans Street, Suite 203, Florence, SC 29501
SJI 100—2020: Standard Specification for K-Series, LH-Series, and DLH-Series Open Web Steel Joists and for Joist Girders
1604.3.3, 2207.1, 2207.2, 2207.3, 2207.4, 2207.5
SJI 200—2015: Standard Specification for CJ-Series Composite Steel Joists
1604.3.3, 2207.1, 2207.2, 2207.3, 2207.4, 2207.5
SPRI Single-Ply Roofing Industry, 465 Waverly Oaks Road, Suite 421, Waltham, MA 02452
ANSI/SPRI GT-1—2022: Test Standard for External Gutter Systems
1504.6.1, 1511.7.6.1
ANSI/SPRI RP-4—2019: Wind Design Standard for Ballasted Single-ply Roofing Systems
1504.5
ANSI/SPRI VF-1—2021: External Fire Design Standard for Vegetative Roofs
1505.10
ANSI/SPRI/FM 4435/ES-1—2017: Test Standard for Edge Systems Used with Low Slope Roofing Systems
1504.6, 1511.7.6.1
35-40 2025 CALIFORNIA BUILDING CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
REFERENCED STANDARDS
SRCC Solar Rating & Certification Corporation, 400 High Point Drive, Suite 400, Cocoa, FL 32926
ICC 900/SRCC 300—2020: Solar Thermal System Standard
3111.2.1
ICC 901/SRCC 100—2020: Solar Thermal Collector Standard
3111.2.1
TIA Telecommunications Industry Association, 1320 N. Courthouse Road #200, Arlington, VA 22201
ANSI/TIA 222-I—2023: Structural Standard for Antenna Supporting Structures, Antennas and Small Wind Turbine Support
Structures
1609.1.1, 3108.1, 3108.2
TMS The Masonry Society, 105 South Sunset Street, Suite Q, Longmont, CO 80501-6172
216—2014(19): Code Requirements for Determining Fire Resistance of Concrete and Masonry Construction Assemblies Table 721.1(2), 722.1
302—2018: Standard Method for Determining the Sound Transmission Ratings for Masonry Assemblies
1208.2.1
402—16: Building Code Requirements for Masonry Structures
2109.1, 2109.1.1, 2109.2
CRC § 1.1 High relevance — show source text
2025 CALIFORNIA RESIDENTIAL CODE APPENDIX BG-1
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APPENDIX BG-2 2025 CALIFORNIA RESIDENTIAL CODE
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BG SOUND TRANSMISSION
The provisions contained in this appendix are not mandatory unless specifically a dopted by a state agency or referenced in the adopting ordinance.
See Section 1206 “Sound Transmission” of the California Building Code, Title 24, Part 2, for requirements applicable to structures in this code.
User notes:
About this appendix: Sound transmission relates directly to the psychological and long-term physical well-being of building occupants. Many human activities cannot be accommodated efficiently or comfortably in various types of building spaces without proper attention to the mitigation of sound transmission from other spaces within the building, or from outside of the building. In Appendix BG, attention is specifically paid to the mitigation of sound transmission between dwelling units and other dwelling units and occupancies.
SECTION BG101—GENERAL
BG101.1 General. Wall and floor-ceiling assemblies separating dwelling units, including those separating adjacent townhouse units, shall provide airborne sound insulation for walls, and both airborne and impact sound insulation for floor-ceiling assemblies.
SECTION BG102—AIRBORNE SOUND
BG102.1 General. Airborne sound insulation for wall and floor-ceiling assemblies shall meet a sound transmission class (STC) rating of 45 where tested in accordance with ASTM E90 or a Normalized Noise Isolation Class (NNIC) rating of 42 where tested in accordance with ASTM E336. Penetrations or openings in construction assemblies for piping; electrical devices; recessed cabinets; bathtubs; soffits; or heating, ventilating or exhaust ducts shall be sealed, lined, insulated or otherwise treated to maintain the required ratings. Dwelling unit entrance doors, which share a common space, shall be tight fitting to the frame and sill.
BG102.1.1 Masonry. The sound transmission class of concrete masonry and clay masonry assemblies shall be calculated in accordance with TMS 0302 or determined through testing in accordance with ASTM E90.
SECTION BG103—STRUCTURAL-BORNE SOUND
BG103.1 General. Floor/ceiling assemblies between dwelling units, or between a dwelling unit and a public or service area within a structure, shall have an impact insulation class (IIC) rating of not less than 45 when tested in accordance with ASTM E492 or a Normalized Impact Sound Rating (NISR) of 42 where tested in accordance with ASTM E1007.
SECTION BG104—REFERENCED STANDARDS
BG104.1 General. See Table BG104.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, the standard title, and the section or sections of this appendix that references the standard.
TABLE BG104.1—REFERENCED STANDARDS Col2 Col3 STANDARD
ACRONYMSTANDARD NAME SECTIONS
HEREIN
REFERENCEDASTM E90—09 Test Method for Laboratory Measurement of
Airborne Sound Transmission Loss of Building Partitions and ElementsBG102.1, BG102.1. CRC § 1.4 High relevance — show source text
The architect or structural engineer shall establish a method of quality control of the masonry construction acceptable to the enforcement agency which shall be described in the contract documents. Verification of compliance with the requirements for the specified strength of masonry during construction shall be provided using the prism test method in accordance with TMS 602, Article 1.4 B.3. Verification of compliance with the specified compressive strength prior to the start of construction shall be obtained by using the prism test method in accordance with TMS 602, Article 1.4 B.3.
2105.3 Mortar and grout tests. [OSHPD 1R, 2 & 5] TMS 602, Article 1.4 B Compressive strength determination. Modify TMS 602, Arti- cle 1.4 B as follows by adding:
5. Additional testing requirements: a. At the beginning of all masonry work, at least one test sample of the mortar shall be taken on 3 successive working days and at 1-week intervals thereafter. Where mortar is based on a proportion specification, mortar shall be sampled and tested during construction in accordance with ASTM C780, including Annex 4, to verify the proportions specified in ASTM C270, Table 2. Where mortar is based on a property specification, mortar shall be laboratory prepared and tested prior to construction in accordance with ASTM C780 to verify the properties specified in ASTM C270, Table 1 and field sampled and tested during construction in accordance with ASTM C780 to verify the proportions with the laboratory tests. Mortar sampling and testing is not required for preblended mortars in conformance with ASTM C1714 with a material certificate. b. Samples of grout shall be taken for each mix design, each day grout is placed, and not less than every 5,000 square feet (464.5 m [2] ) of masonry wall area. They shall meet the minimum strength requirement given in ASTM C476/TMS 602 Section 2.2 or greater as specified. c. Additional samples shall be taken whenever any change in materials or job conditions occur, as determined by the building official.
d. Test specimens for mortar and grout shall be made as set forth in ASTM C780/C1586 and ASTM C1019. When the prism test method is used in accordance with TMS 602, Article 1.4 B.3 during construction, the tests in this section are not required.
Exception: For nonbearing nonshear masonry walls not exceeding total wall height of 12 feet (3658 mm) above top of foundation, mortar test shall be permitted to be limited to those at the beginning of masonry work for each mix design. 2105.4 Masonry core testing . [OSHPD 1R, 2 & 5] Two cores shall be taken from each building for each 5,000 square feet (465 m [2] ) of the masonry wall area or fraction thereof. The approved agency shall perform or observe the coring of the masonry walls and sample loca- tions shall be subject to approval of the registered design professional.
CRC § 9.5.2 High relevance — show source text
R603.9.5.2 Seismic Design Categories D 0 , D 1 and D 2 . In Seismic Design Categories D 0, D 1 and D 2, the required length of structural sheathing and overturning anchorage shall be determined in accordance with Tables R603.9.5(1), R603.9.5(2), R603.9.5(3), and R603.9.5(4). Overturning anchorage shall be installed on the doubled studs at the end of each full-height wall segment.
SECTION R604 —WOOD STRUCTURAL PANELS
R604.1 Identification and grade. Wood structural panels shall conform to DOC PS 1, DOC PS 2, ANSI/APA PRP 210, CSA O325 or CSA O437. Panels shall be identified by a grade mark or certificate of inspection issued by an approved agency.
R604.2 Allowable spans. The maximum allowable spans for wood structural panel wall sheathing shall not exceed the values set forth in Table R602.3(3).
R604.3 Installation. Wood structural panel wall sheathing shall be attached to framing in accordance with Table R602.3(1) or R602.3(3).
SECTION R605 —PARTICLEBOARD
R605.1 Identification and grade. Particleboard shall conform to ANSI A208.1 and shall be so identified by a grade mark or certificate of inspection issued by an approved agency. Particleboard shall comply with the grades specified in Table R602.3(4).
SECTION R606 —GENERAL MASONRY CONSTRUCTION
R606.1 General. Masonry construction shall be designed and constructed in accordance with the provisions of this section, TMS 402, TMS 403 or TMS 404.
R606.1.1 Professional registration not required. Where the provisions of TMS 403 or the provisions of this section are used to design masonry, project drawings, typical details and specifications shall not exempt construction documents from the require- ment to be stamped by a California licensed architect or engineer. Notwithstanding other sections of law, the law establishing these provisions is found in Business and Professions Code Sections 5537.1 and 6737.1.
R606.2 Masonry construction materials.
R606.2.1 Concrete masonry units. Concrete masonry units shall conform to the following standards: ASTM C55 for concrete brick; ASTM C73 for calcium silicate face brick; ASTM C90 for load-bearing concrete masonry units; ASTM C744 for prefaced concrete and calcium silicate masonry units; or ASTM C1634 for concrete facing brick.
R606.2.2 Clay or shale masonry units. Clay or shale masonry units shall conform to the following standards: ASTM C34 for structural clay load-bearing wall tile; ASTM C56 for structural clay nonload-bearing wall tile; ASTM C62 for building brick (solid masonry units made from clay or shale); ASTM C126 for ceramic-glazed structural clay facing tile, facing brick and solid masonry units; ASTM C212 for structural clay facing tile; ASTM C216 for facing brick (solid masonry units made from clay or shale); ASTM C652 for hollow brick (hollow masonry units made from clay or shale); ASTM C1088 for solid units of thin veneer brick; or ASTM C1405 for glazed brick (single-fired solid brick units).
CRC § 12.3 High relevance — show source text
R606.12.3 Seismic Design Category D 0 or D 1 . Structures in Seismic Design Category D 0 or D 1 shall comply with the requirements of Seismic Design Category C and the additional requirements of this section. AAC masonry shall not be used for the design of masonry elements that are part of the lateral force-resisting system.
R606.12.3.1 Design requirements. Masonry elements other than those covered by Section R606.12.2.2.2 shall be designed in accordance with the requirements of Chapters 1 through 7 and Sections 8.1 and 8.3 of TMS 402 and shall meet the minimum reinforcement requirements contained in Sections R606.12.3.2 and R606.12.3.2.1. Otherwise, masonry shall be designed in accordance with TMS 403.
Exception: Masonry walls limited to one story in height and 9 feet (2743 mm) between lateral supports need not be designed provided they comply with the minimum reinforcement requirements of Sections R606.12.3.2 and R606.12.3.2.1.
R606.12.3.2 Minimum reinforcement requirements for masonry walls. Masonry walls other than those covered by Section R606.12.2.2.3 shall be reinforced in both the vertical and horizontal direction. The sum of the cross-sectional area of horizontal and vertical reinforcement shall be not less than 0.002 times the gross cross-sectional area of the wall, and the minimum crosssectional area in each direction shall be not less than 0.0007 times the gross cross-sectional area of the wall. Reinforcement shall be uniformly distributed. Table R606.12.3.2 shows the minimum reinforcing bar sizes required for varying thicknesses of masonry walls. The maximum spacing of reinforcement shall be 48 inches (1219 mm) provided that the walls are solid grouted and constructed of hollow open-end units, hollow units laid with full head joints or two wythes of solid units. The maximum spacing of reinforcement shall be 24 inches (610 mm) for all other masonry.
TABLE R606.12.3.2—MINIMUM DISTRIBUTED WALL REINFORCEMENT
FOR BUILDINGS ASSIGNED TO SEISMIC DESIGN CATEGORY D or D
0 1Col2 Col3 Col4 ** NOMINAL**
WALL THICKNESS
(inches)** MINIMUM SUM OF**
THE VERTICAL AND HORIZONTAL
REINFORCEMENT AREASa
(square inches per foot)** MINIMUM REINFORCEMENT AS**
DISTRIBUTED IN BOTH HORIZONTAL
AND VERTICAL DIRECTIONSb
(square inches per foot)** MINUMUM BAR SIZE**
FOR REINFORCEMENT
SPACED AT 48 INCHES6 0.135 0.047 #4 8 0.183 0.064 #5 10 0.231 0.081 #6 12 0.279 0.098 #6 For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 square inch per foot = 2064 mm2/m.
a.CRC § 1205.3.3 High relevance — show source text
1205.3.3 Court drainage. The bottom of every court shall be properly graded and drained to a public sewer or other approved disposal system complying with the California Plumbing Code .
SECTION 1206—SOUND TRANSMISSION
1206.1 Scope. This section shall apply to common interior walls, partitions and floor/ceiling assemblies between adjacent dwelling units and sleeping units or between dwelling units and sleeping units and adjacent public areas.
1206.2 Airborne sound. Walls, partitions and floor-ceiling assemblies separating dwelling units and sleeping units from each other or from public or service areas shall have a sound transmission class of not less than 50 where tested in accordance with ASTM E90, or have a Normalized Noise Isolation Class (NNIC) rating of not less than 45 if field tested, in accordance with ASTM E336 for airborne noise. Alternatively, the sound transmission class of walls, partitions and floor-ceiling assemblies shall be established by engineering analysis based on a comparison of walls, partitions and floor-ceiling assemblies having sound transmission class ratings as determined by the test procedures set forth in ASTM E90. Engineering analysis shall be performed by a registered design professional. Penetrations or openings in construction assemblies for piping; electrical devices; recessed cabinets; bathtubs; soffits; or heating, ventilating or exhaust ducts shall be sealed, lined, insulated or otherwise treated to maintain the required ratings. This requirement shall not apply to entrance doors; however, such doors shall be tight fitting to the frame and sill.
1206.2.1 Masonry. The sound transmission class of concrete masonry and clay masonry assemblies shall be calculated in accordance with TMS 302 or determined through testing in accordance with ASTM E90.
1206.3 Structure-borne sound. Floor-ceiling assemblies between dwelling units and sleeping units or between a dwelling unit or sleeping unit and a public or service area within the structure shall have an impact insulation class rating of not less than 50 where tested in accordance with ASTM E492, or have a Normalized Impact Sound Rating (NISR) of not less than 45 if field tested in accordance with ASTM E1007. Alternatively, the impact insulation class of floor-ceiling assemblies shall be established by engineering analysis based on a comparison of floor-ceiling assemblies having impact insulation class ratings as determined by the test procedures in ASTM E492. Engineering analysis shall be performed by a registered design professional.
Exception: Impact sound insulation is not required for floor-ceiling assemblies over nonhabitable rooms or spaces not designed to be occupied, such as garages, mechanical rooms or storage areas.
1206.4 Allowable interior noise levels. Interior noise levels attributable to exterior sources shall not exceed 45 dB in any habitable room. The noise metric shall be either the day-night average sound level (Ldn) or the community noise equivalent level (CNEL), consis- tent with the noise element of the local general plan.
1206.5 Acoustical control. [BSC-CG] See California Green Building Standards Code, Chapter 5, Division 5.5 for additional sound trans- mission requirements.
SECTION 1207—ENHANCED CLASSROOM ACOUSTICS
1207.1 General. Enhanced classroom acoustics, where required by this section, shall comply with Section 808 of ICC A117.1.
1207.2 Where required. In Group E occupancies, enhanced classroom acoustics shall be provided in all classrooms with a volume of 20,000 cubic feet (566 m [3] ) or less.
CRC § 2103A.6 High relevance — show source text
2103A.6 Specified compressive strength of masonry and grout . Replace TMS 402 Table 4.3.1 by the following:
TABLE 4.3.1—SPECIFIED COMPRESSIVE STRENGTH REQUIREMENTS Col2 Col3 TYPE OF MASONRY SPECIFIED COMPRESSIVE STRENGTH OF MASONRY SPECIFIED COMPRESSIVE STRENGTH OF GROUT Concrete masonry 2,000 psi (13.79 MPa) ≤ f'm ≤ 3,000 psi (20.68 MPa) f'g ≥ f'm ≤ 5,000 psi (34.47 MPa) Clay masonry 1,500 psi (10.34 MPa) ≤ f'm ≤ 4,500 psi (31.02 MPa) f'g≤ 6,000 (41.37 MPa) SECTION 2104 A —CONSTRUCTION
2104 A .1 Masonry construction. Masonry construction shall comply with the requirements of Sections 2104 A .1.1 through 2104 A .1.3 and with the requirements of either TMS 602 or TMS 604.
2104 A .1.1 Support on wood. Masonry shall not be supported on wood girders or other forms of wood construction except as permitted in Section 2304 A .13.
2104 A .1.2 Molded cornices. Unless structural support and anchorage are provided to resist the overturning moment, the center of gravity of projecting masonry or molded cornices shall lie within the middle one-third of the supporting wall. Terra cotta and metal cornices shall be provided with a structural frame of approved noncombustible material anchored in an approved manner.
2104A.1.3 Reinforced grouted masonry.
2104A.1.3.1 [DSA-SS] TMS 602, Article 3.2 F Cleanouts. Replace TMS 602, Article 3.2 F with the following:
3.2 F. Cleanouts - Provide cleanouts in the bottom course of masonry for each grout pour when the grout pour height exceeds the height limits given in Section 2104A.1.3.5 Item 3. 1. Cleanout openings in hollow unit masonry shall be provided in every cell at the bottom of each pour of grout. Alterna- tively, if the course at the bottom of the pour is constructed entirely of inverted double open-end bond beam units, cleanout openings need only be provided for access to every reinforced cell at the bottom of each pour of grout. 2. Cleanouts in multi-wythe masonry shall be provided for each pour by leaving out every other unit in the bottom wythe of the section being poured or by cleanout openings in the foundation. 3. The foundation or other horizontal construction joints at the cleanouts shall be cleaned of all loose material and mortar droppings before each pour. The cleanouts shall be sealed after inspection and before grouting.
CRC § 2103.5 High relevance — show source text
2103.5 Air entrainment. [OSHPD 1R, 2 & 5] Air-entraining materials or air-entraining admixtures shall not be used in grout.
2103.6 Specified compressive strength of masonry and grout . [OSHPD 1R, 2 & 5] Replace TMS 402 Table 4.3.1 by the following:
TABLE 4.3.1—SPECIFIED COMPRESSIVE STRENGTH REQUIREMENTS Col2 Col3 TYPE OF MASONRY SPECIFIED COMPRESSIVE STRENGTH OF MASONRY SPECIFIED COMPRESSIVE STRENGTH OF GROUT Concrete masonry 2,000 psi (13.79 MPa) ≤ f'm ≤ 3,000 psi (20.68 MPa) f'g ≥ f'm ≤ 5,000 psi (34.47 MPa) Clay masonry 1,500 psi (10.34 MPa) ≤ f'm ≤ 4,500 psi (31.02 MPa) f'g≤ 6,000 (41.37 MPa) SECTION 2104—CONSTRUCTION
2104.1 Masonry construction. Masonry construction shall comply with the requirements of Sections 2104.1.1 and 2104.1.2 and with the requirements of either TMS 602 or TMS 604.
2104.1.1 Support on wood. Masonry shall not be supported on wood girders or other forms of wood construction except as permitted in Section 2304.13.
2104.1.2 Molded cornices. Unless structural support and anchorage are provided to resist the overturning moment, the center of gravity of projecting masonry or molded cornices shall lie within the middle one-third of the supporting wall. Terra cotta and metal cornices shall be provided with a structural frame of approved noncombustible material anchored in an approved manner.
2104.2 Reinforced Grouted masonry. [OSHPD 1R, 2 & 5]
2104.2.1 TMS 602, Article 3.3 B Placing mortar and units. Modify TMS 602, Article 3.3 B.2.c as follows: c. Remove masonry protrusions extending greater than [1] / 4 inch (6.4 mm) into cells or cavities to be grouted.
2104.2.2 TMS 602, Article 3.4 B Reinforcement. Modify TMS 602, Article 3.4 B.1 through Article 3.4 B.3 as follows:
- Support reinforcement to prevent displacement caused by construction loads or by placement of grout or mortar. Rein- forcement and embedded items shall be clean, properly positioned and securely anchored against movement prior to grouting. Bolts shall be accurately set with templates or by approved equivalent means and held in place to prevent dislo- cation during grouting.
- Completely embed reinforcing bars and embedded items in grout in accordance with Article 3.5.
CRC § 4.3.1 High relevance — show source text
TABLE 4.3.1—SPECIFIED COMPRESSIVE STRENGTH REQUIREMENTS Col2 Col3 TYPE OF MASONRY SPECIFIED COMPRESSIVE STRENGTH OF MASONRY SPECIFIED COMPRESSIVE STRENGTH OF GROUT Concrete masonry 2,000 psi (13.79 MPa) ≤ f'm ≤ 3,000 psi (20.68 MPa) f'g ≥ f'm ≤ 5,000 psi (34.47 MPa) Clay masonry 1,500 psi (10.34 MPa) ≤ f'm ≤ 4,500 psi (31.02 MPa) f'g≤ 6,000 (41.37 MPa) 2115.3 Construction.
2115.3.1 Masonry construction. Architectural cast stone construction shall be considered as an alternative system.
2115.3.2 Reinforced grouted masonry.
2115.3.2.1 TMS 602, Article 3.3 B Placing mortar and units. Modify TMS 602, Article 3.3 B.2.c as follows: c. Remove masonry protrusions extending greater than [1] / 4 inch ( 6.4 mm) into cells or cavities to be grouted.
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MASONRY
2115.3.2.2 TMS 602, Article 3.4 B Reinforcement. Modify TMS 602, Article 3.4 B.1 through Article 3.4 B.3 as follows:
- Support reinforcement to prevent displacement caused by construction loads or by placement of grout or mortar. Reinforcement and embedded items shall be clean, properly positioned and securely anchored against moving prior to grouting.
- Completely embed reinforcing bars and embedded items in grout in accordance with Article 3.5.
- Maintain clear distance between reinforcing bars and the interior of masonry unit or formed surface of at least [1] / 2 inch (12.7 mm) and a minimum of one bar diameter, except where cross webs of hollow units are used as supports for horizontal reinforcement.
2115.3.2.3 TMS 602, Article 3.4 E Anchor bolts. Replace TMS 602, Article 3.4 E.3 and add Articles 3.4 E.5 and 3.4 E.6 as follows: 3. Anchor bolts in the wythe or face shells of hollow masonry units shall be positioned to maintain a minimum of [1] / 2 inch (12.7 mm) of grout between the bolt circumference, the wythe or the face shell. For the portion of the bolt that is within the grouted cell, maintain a clear distance between the bolt and the face of masonry unit and between the head of the bolt and the formed surface of grout of at least [1] / 4 inch (6.4 mm) when using fine grout and at least [1] / 2 inch (12.7 mm) _when using coarse grout.
CRC § 6-98 High relevance — show source text
R606.9 Allowable stresses. Allowable compressive stresses in masonry shall not exceed the values prescribed in Table R606.9. In determining the stresses in masonry, the effects of all loads and conditions of loading and the influence of all forces affecting the design and strength of the several parts shall be taken into account.
TABLE R606.9—ALLOWABLE COMPRESSIVE STRESSES FOR EMPIRICAL DESIGN OF MASONRY Col2 Col3 ** CONSTRUCTION; COMPRESSIVE STRENGTH OF UNIT, GROSS AREA** ** ALLOWABLE COMPRESSIVE**
STRESSESa GROSS CROSS-SECTIONAL AREAb** ALLOWABLE COMPRESSIVE**
STRESSESa GROSS CROSS-SECTIONAL AREAb** CONSTRUCTION; COMPRESSIVE STRENGTH OF UNIT, GROSS AREA** ** Type M or S mortar** ** Type N mortar** Solid masonry of brick and other solid units of clay or shale; sand-lime or concrete brick: 8,000 + psi 350 300 4,500 psi 225 200 2,500 psi 160 140 1,500 psi 115 100 Groutedc masonry, of clay or shale; sand-lime or concrete: 4,500 + psi 225 200 2,500 psi 160 140 1,500 psi 115 100 Solid masonry of solid concrete masonry units: 3,000 + psi 225 200 2,000 psi 160 140 1,200 psi 115 100 6-98 2025 CALIFORNIA RESIDENTIAL CODE
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WALL CONSTRUCTION
TABLE R606.9—ALLOWABLE COMPRESSIVE STRESSES FOR EMPIRICAL DESIGN OF MASONRY—continued Col2 Col3 ** CONSTRUCTION; COMPRESSIVE STRENGTH OF UNIT, GROSS AREA** ** ALLOWABLE COMPRESSIVE**
STRESSESa GROSS CROSS-SECTIONAL AREAb** ALLOWABLE COMPRESSIVE**
STRESSESa GROSS CROSS-SECTIONAL AREAb** CONSTRUCTION; COMPRESSIVE STRENGTH OF UNIT, GROSS AREA** ** Type M or S mortar** ** Type N mortar** Masonry of hollow load-bearing units: 2,000 + psi 140 120 1,500 psi 115 100 1,000 psi 75 70 700 psi 60 55 Hollow walls (cavity or masonry bondedd) solid units: 2,500 + psi 160 140 1,500 psi 115 100 Hollow units 75 70 Stone ashlar masonry: Granite 720 640 Limestone or marble 450 400 Sandstone or cast stone 360 320 Rubble stone masonry: Coarse, rough or random 120 100 For SI: 1 pound per square inch = 6.895 kPa.
a. Linear interpolation shall be used for determining allowable stresses for masonry units having compressive strengths that are intermediate between those given in the table.
b. Gross cross-sectional area shall be calculated on the actual rather than nominal dimensions.
c.CRC § 7.4.4.1.4 High relevance — show source text
7.4.4.1.4 When the reinforcement in bearing walls is designed, placed and anchored in position as for columns, the allowable stresses shall be as for columns.
7.4.4.1.5 Joint reinforcement shall not be used as principal reinforcement in masonry.
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SECTION 2107—ALLOWABLE STRESS DESIGN
2107.1 General. The design of masonry structures using allowable stress design shall comply with Section 2106 and the requirements of Chapters 1 through 8 of TMS 402 except as modified by Sections 2107.2 through 2107.3 [OSHPD 1R, 2 & 5] through 2107.5.
2107.2 TMS 402, Section 6.1.7.1, lap splices. As an alternative to Section 6.1.7.1, it shall be permitted to design lap splices in accordance with Section 2107.2.1.
2107.2.1 Lap splices. The minimum length of lap splices for reinforcing bars in tension or compression, l d, shall be: Equation 21-1 l d = 0.002 d b f s
For SI: l d = 0.29 d b f s
but not less than 12 inches (305 mm). The length of the lapped splice shall be not less than 40 bar diameters.
In regions of moment where the design tensile stresses in the reinforcement are greater than 80 percent of F s, the lap length of splices shall be increased not less than 50 percent of the minimum required length, but need not be greater than 72 d b . Other equivalent means of stress transfer to accomplish the same 50 percent increase shall be permitted. Where epoxy coated bars are used, lap length shall be increased by 50 percent.
2107.3 TMS 402, Section 6.1.7, splices of reinforcement. Add to Section 6.1.7 as follows:
6.1.7 – Splices of reinforcement. Lap splices, welded splices or mechanical splices are permitted in accordance with the provisions of this section. Welding shall conform to AWS D1.4. Welded splices shall be of ASTM A706 steel reinforcement. Reinforcement larger than No. 9 (M #29) shall be spliced using mechanical connections in accordance with Section 6.1.7.2.
2107.4 Reserved.
2107.5 [OSHPD 1R, 2 & 5] TMS 402, Section 8.3.4.4 Walls. Modify TMS 402 by adding Section 8.3.4.4 as follows by adding:
8.3.4.4.1 The minimum thickness of walls is given in this section. Stresses shall be determined on the basis of the net thickness of the masonry, with consideration for reduction, such as raked joints.
CRC § 2101A.1.2 High relevance — show source text
centers.
2101A.1.2 Amendments in this chapter. DSA-SS and OSHPD 1 & 4 adopt this chapter and all amendments.
Exception: Amendments adopted by only one agency appear in this chapter preceded with the appropriate acronym of the adopt- ing agency, as follows: 1. Division of the State Architect-Structural Safety:
[DSA-SS] For applications listed in Section 1.9.2.1. 2. Office of Statewide Hospital Planning and Development:
[OSHPD 1] - For applications listed in Section 1.10.1.
[OSHPD 4] - For applications listed in Section 1.10.4.
2101A.1.3 Prohibition. The following design methods, systems and materials in TMS 402/602 are not permitted by DSA-SS and OSHPD:
1. Unreinforced masonry. 2. Autoclaved aerated concrete (AAC) masonry. 3. Empirical design of masonry.
4. Adobe construction.
5. Ordinary reinforced masonry shear walls. 6. Intermediate reinforced masonry shear walls. 7. Prestressed masonry shear walls. 8. Direct design of masonry. 9. Design of masonry infill. 10. Prescriptive design of masonry partition walls. 11. Limit design method. 12. Glass fiber reinforced polymer (GFRP) reinforced masonry.
2101 A .2 Design methods. Masonry shall comply with the provisions of TMS 402 or TMS 404 as well as applicable requirements of this chapter.
2101 A .2.1 Masonry veneer. Masonry veneer shall comply with the provisions of Chapter 14.
2101 A .3 Special inspection. The special inspection of masonry shall be as defined in Chapter 17 A, or an itemized testing and inspection program shall be provided that meets or exceeds the requirements of Chapter 17 A .
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MASONRY
SECTION 2102 A —NOTATIONS
2102 A .1 General. The following notations are used in the chapter:
NOTATIONS .
d b = Diameter of reinforcement, inches (mm).
F s = Allowable tensile or compressive stress in reinforcement, psi (MPa).
f r = Modulus of rupture, psi (MPa).
f s = Computed stress in reinforcement due to design loads, psi (MPa).
L s = Distance between supports, inches (mm).
l d = Required development length or lap length of reinforcement, inches (mm).
P = The applied load at failure, pounds (N).
S t = Thickness of the test specimen measured parallel to the direction of load, inches (mm).
S w = Width of the test specimen measured parallel to the loading cylinder, inches (mm).
SECTION 2103 A —MASONRY CONSTRUCTION MATERIALS
CRC § 2.3.1 Medium relevance — show source text
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APPENDIX CK-8 2025 CALIFORNIA RESIDENTIAL CODE
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APPENDIX NA-2 2025 CALIFORNIA RESIDENTIAL CODE
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Concrete Capillary break R506.2.3.1 Compressive strength R402.2 Floors (on ground) R506 Tile (roof) R905.3 Weathering Figure R301.2(1), R402.2 Construction
3D-printed Appendix BM Cavity wall masonry R608 Cob Appendix BK Extended plate walls Appendix BN Flood-resistant R306
Floors Chapter 5 Footings R403 Foundation material R402
Foundation walls R404
Foundations Chapter 4 Hemp-lime Appendix BL Masonry R606, R607, R608, R610 Pollutant control R340 Roofs Chapter 8 Steel framing R505, R603, R804 Strawbale Appendix BJ Straw-clay Appendix BI Walls Chapter 6 Waste R334.1 Wood framing R502, R602, R802 Construction Documents R106, R306.3.9
Court Emergency escape and rescue openings R319.1, R319.2.4 Means of egress R318.1 Natural light R325.1.1 Covering Exterior R703
Interior R702 Roof Chapter 9 Wall Chapter 7 Crawl Space R408
Access R408.4
Damper Fireplace R1001.7.1 Dampproofing R406 Day Care Appendix BD Defined R202 Large family day-care homes R336 Dead Loads R301.4
Decay Protection against R304 Deck
Attachment R318.5 Supported by exterior wall R507 Wood/plastic composite boards R507.2.2
Definitions Building R202 Mechanical system R202 Plumbing R202 Design Criteria R301 Alternative provisions R301.1.1 Application R301.1 Climatic and geographic R301.2 Dead load R301.4
Deflection R301.6 Engineered design R301.1.3
Accessibility R322 Accessory Dwelling Unit R202 Authority to Enforce Automatic Fire Sprinkler Systems 1.8.9.1, R313.2 Accessory Structure Elevations R306.3.2
Energy R330.5 Exterior walls R302.1
Scope R101.2 Addition (see also Existing Buildings) Carbon monoxide alarms R311.2.2 Change of occupancy R110.1 Construction R302.2.3
CRC § 25.4 Medium relevance — show source text
Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|FIGURE R608.9(2)—WOOD-FRAMED FLOOR TO SIDE OF CONCRETE WALL, FRAMING PARALLEL
B
SECTION
CLEAR
TENSION TIE. SEE TABLE R608.9(2) FOR SPACING. 54 MIL × 2 IN × 6 FT - Col2 Col3 Col4 Col5 Col6 Col7 Col8 Col9 Col10 Col11 Col12 TENSION TIE. SEE TABLER608.9(2) FOR SPACING. 54 MIL × 2 IN × 6 FT -LENGTH MINIMUM GRADE 50 STRAP UNDER OR ON TOP OF FLOORSHEATHING. ATTACH STRAP TO FIRST TWO BLOCKS WITH 12-10d COMNAILS. 10d COMMON NAILS AT 6 IN. ON CENTER FOR BALANCE OF STR2× FULLDEPTH BLOCKING, TWO BAYS,MINIMUMAT EACH TENSION TIE. PROVIDE 43MIL MINIMUM CLIP ANGLE EACH END WITH NOTLESS THAN 4-10d COMMON NAILS EACH LEG.
WOOD 2 ×8MINIMUM LEDGER
SHEATHING BOUNDARY
NAILING. SEE TABLE
R602.3(1)TENSION TIE. SEE TABLER608.9(2) FOR SPACING. 54 MIL × 2 IN × 6 FT -LENGTH MINIMUM GRADE 50 STRAP UNDER OR ON TOP OF FLOORSHEATHING. ATTACH STRAP TO FIRST TWO BLOCKS WITH 12-10d COMNAILS. 10d COMMON NAILS AT 6 IN.CRC § 25.4 Medium relevance — show source text
As a minimum, this nominal thick-
ness shall occur in the portion of the wall indicated by the cross hatching in Figure R608.9(12). For the remainder of the wall, see Note b.
e. Letter “B” indicates that a5/8-inch-diameter anchor bolt is required.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(12). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in cells that do not contain a number.
d. Number 6 indicates minimum permitted nominal wall thickness in inches necessary to develop required strength (capacity) of connection. As a minimum, this nominal thick-
ness shall occur in the portion of the wall indicated by the cross hatching in Figure R608.9(12). For the remainder of the wall, see Note b.
e. Letter “B” indicates that a5/8-inch-diameter anchor bolt is required.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(12). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in cells that do not contain a number.
d. Number 6 indicates minimum permitted nominal wall thickness in inches necessary to develop required strength (capacity) of connection. As a minimum, this nominal thick-
ness shall occur in the portion of the wall indicated by the cross hatching in Figure R608.9(12). For the remainder of the wall, see Note b.
e. Letter “B” indicates that a5/8-inch-diameter anchor bolt is required.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(12). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in cells that do not contain a number.
d. Number 6 indicates minimum permitted nominal wall thickness in inches necessary to develop required strength (capacity) of connection. As a minimum, this nominal thick-
ness shall occur in the portion of the wall indicated by the cross hatching in Figure R608.9(12). For the remainder of the wall, see Note b.
e. Letter “B” indicates that a5/8-inch-diameter anchor bolt is required.|R608.9.1 Connections between concrete walls and light-frame floor, ceiling and roof systems. Connections between concrete walls and light-frame floor, ceiling and roof systems using the prescriptive details of Figures R608.9(1) through R608.9(12) shall comply with this section and Sections R608.9.2 and R608.9.3.
CRC § 25.4 Medium relevance — show source text
For the remainder of the wall, see Note b.
e. Letter “B” indicates that a5/8-inch-diameter anchor bolt and a minimum nominal 3 × 6 sill plate are required.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(10). Use of this detail is permitted where a cell is not shaded, and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in cells that do not contain a number.
d. Numbers 6 and 8 indicate minimum permitted nominal wall thickness in inches necessary to develop required strength (capacity) of connection. As a minimum, this nominal
thickness shall occur in the portion of the wall indicated by the cross hatching in Figure R608.9(10). For the remainder of the wall, see Note b.
e. Letter “B” indicates that a5/8-inch-diameter anchor bolt and a minimum nominal 3 × 6 sill plate are required.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(10). Use of this detail is permitted where a cell is not shaded, and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in cells that do not contain a number.
d. Numbers 6 and 8 indicate minimum permitted nominal wall thickness in inches necessary to develop required strength (capacity) of connection. As a minimum, this nominal
thickness shall occur in the portion of the wall indicated by the cross hatching in Figure R608.9(10). For the remainder of the wall, see Note b.
e. Letter “B” indicates that a5/8-inch-diameter anchor bolt and a minimum nominal 3 × 6 sill plate are required.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(10). Use of this detail is permitted where a cell is not shaded, and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in cells that do not contain a number.
d. Numbers 6 and 8 indicate minimum permitted nominal wall thickness in inches necessary to develop required strength (capacity) of connection. As a minimum, this nominal
thickness shall occur in the portion of the wall indicated by the cross hatching in Figure R608.9(10). For the remainder of the wall, see Note b.
e. Letter “B” indicates that a5/8-inch-diameter anchor bolt and a minimum nominal 3 × 6 sill plate are required.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(10). Use of this detail is permitted where a cell is not shaded, and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.
c.CRC § 19.2 Medium relevance — show source text
110D**|** 117D**|** 125D**| |12|12||||||| |12|24||||||| |12|36||||||| |12|48||||||| |16|16||||||| |16|32||||||| |16|48||||||| |19.2|19.2||||||| |19.2|38.4||||||| |For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(1). Use of this detail is permitted where a cell is not shaded and prohibited where shaded.
b. Wall design per other provisions of Section R608 is required.|FIGURE R608.9(2)—WOOD-FRAMED FLOOR TO SIDE OF CONCRETE WALL, FRAMING PARALLEL
B
SECTION
CLEAR
|TENSION TIE. SEE TABLE R608.9(2) FOR SPACING.
CRC § 25.4 Medium relevance — show source text
This table is for use with the detail in Figure R608.9(6). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(6). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(6). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s.
a. This table is for use with the detail in Figure R608.9(6). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|FIGURE R608.9(7)—COLD-FORMED STEEL FLOOR TO TOP OF CONCRETE WALL, FRAMING PERPENDICULAR
For SI: 1 mil = 0.0254 mm, 1 inch = 25.4 mm, 1 pound-force = 4.448 N.
6-164 2025 CALIFORNIA RESIDENTIAL CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
WALL CONSTRUCTION
TABLE R608.9(7)—COLD-FORMED STEEL-FRAMED FLOOR TO TOP OF CONCRETE WALL, FRAMING PERPENDICULARa, b, c, d, e Col2 Col3 Col4 Col5 Col6 Col7 Col8 ** ANCHOR**
BOLT
SPACING
(inches)** TENSION TIE**
SPACING
(inches)** BASIC WIND SPEED AND WIND EXPOSURE CATEGORY (mph)** ** BASIC WIND SPEED AND WIND EXPOSURE CATEGORY (mph)** ** BASIC WIND SPEED AND WIND EXPOSURE CATEGORY (mph)** ** BASIC WIND SPEED AND WIND EXPOSURE CATEGORY (mph)** ** BASIC WIND SPEED AND WIND EXPOSURE CATEGORY (mph)** ** BASIC WIND SPEED AND WIND EXPOSURE CATEGORY (mph)** ** ANCHOR**
BOLT
SPACING
(inches)** TENSION TIE**
SPACING
(inches)** CRC § 19.2 Medium relevance — show source text
BOLT SPACING**
(inches)|** TENSION TIE SPACING**
(inches)|** BASIC WIND SPEED (mph) AND WIND EXPOSURE CATEGORY**|** BASIC WIND SPEED (mph) AND WIND EXPOSURE CATEGORY**|** BASIC WIND SPEED (mph) AND WIND EXPOSURE CATEGORY**|** BASIC WIND SPEED (mph) AND WIND EXPOSURE CATEGORY**|** BASIC WIND SPEED (mph) AND WIND EXPOSURE CATEGORY**|** BASIC WIND SPEED (mph) AND WIND EXPOSURE CATEGORY**| |** ANCHOR BOLT SPACING**
(inches)|** TENSION TIE SPACING**
(inches)|** 115B**|** 120B**|** 130B**|** 140B**|** 150B**|** 160B**| |** ANCHOR BOLT SPACING**
(inches)|** TENSION TIE SPACING**
(inches)|** —| —| 110C**|** 119C**|** 127C**|** 136C**| |** ANCHOR BOLT SPACING**
(inches)|** TENSION TIE SPACING**
(inches)|** —| —| —| 110D**|** 117D**|** 125D**| |12|12||||||| |12|24||||||| |12|36||||||| |12|48||||||| |16|16||||||| |16|32||||||| |16|48||||||| |19.2|19.2||||||| |19.2|38.4||||||| |24|24||||||| |24|48||||||| |For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5).CRC § 25.4 Medium relevance — show source text
This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|FIGURE R608.9(6)—COLD-FORMED STEEL FLOOR TO SIDE OF CONCRETE WALL, FRAMING PARALLEL
For SI: 1 mil = 0.0254 mm, 1 inch = 25.4 mm, 1 pound-force = 4.448 N.
2025 CALIFORNIA RESIDENTIAL CODE 6-163
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
WALL CONSTRUCTION
TABLE R608.9(6)—COLD-FORMED STEEL-FRAMED FLOOR TO SIDE OF CONCRETE WALL, FRAMING PARALLELa, b, c Col2 Col3 Col4 Col5 Col6 Col7 Col8 ** ANCHOR BOLT SPACING**
(inches)** TENSION TIE SPACING**
(inches)** BASIC WIND SPEED (mph) AND WIND EXPOSURE CATEGORY** ** BASIC WIND SPEED (mph) AND WIND EXPOSURE CATEGORY** ** BASIC WIND SPEED (mph) AND WIND EXPOSURE CATEGORY** ** BASIC WIND SPEED (mph) AND WIND EXPOSURE CRC § 19.2 Medium relevance — show source text
2||||||| |19.2|38.4||||||| |24|24||||||| |24|48||||||| |For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c. For wind design, minimum 4-inch-nominal wall is permitted in unshaded cells that do not contain a number.|For SI:1 inch = 25.4 mm, 1 mile per hour = 0.4470 m/s.
a. This table is for use with the detail in Figure R608.9(5). Use of this detail is permitted where a cell is not shaded.
b. Wall design per other provisions of Section R608 is required.
c.CRC § 8.1.1 Medium relevance — show source text
Wall openings in waffle-grid and screen-grid walls shall be located such that not less than one-half of a vertical core occurs along each side of the opening.
R608.8.1.1 Horizontal reinforcement. Lintels complying with Section R608.8.2 shall be provided above wall openings equal to or greater than 2 feet (610 mm) in width.
Openings equal to or greater than 2 feet (610 mm) in width shall have not less than one No. 4 bar placed within 12 inches (305 mm) of the bottom of the opening. See Figure R608.8(1).
Horizontal reinforcement placed above and below an opening shall extend beyond the edges of the opening the dimension required to develop the bar in tension in accordance with Section R608.5.4.4.
Exception: Continuous horizontal wall reinforcement placed within 12 inches (305 mm) of the top of the wall story as required in Sections R404.1.3.2 and R608.6.2 is permitted in lieu of top or bottom lintel reinforcement required by Section R608.8.2 provided that the continuous horizontal wall reinforcement meets the location requirements specified in Figures R608.8(2), R608.8(3), and R608.8(4) and the size requirements specified in Tables R608.8(2) through R608.8(10).
R608.8.1.2 Vertical reinforcement. Not less than one No. 4 bar [Grade 40 (280 MPa)] shall be provided on each side of openings equal to or greater than 2 feet (610 mm) in width. The vertical reinforcement required by this section shall extend the full height of the wall story and shall be located within 12 inches (305 mm) of each side of the opening. The vertical reinforcement required on each side of an opening by this section is permitted to serve as reinforcement at the ends of solid wall segments in accordance with Section R608.7.2.2.2, provided it is located as required by the applicable detail in Figure R608.7.1.1(2). Where the vertical reinforcement required by this section is used to satisfy the requirements of Section R608.7.2.2.2 in waffle- and screen-grid walls, a concrete flange shall be created at the ends of the solid wall segments in accordance with Table R608.7.1.1(6), Note e. In the top-most story, the reinforcement shall terminate in accordance with Section R608.6.4.
R608.8.2 Lintels. Lintels shall be provided over all openings equal to or greater than 2 feet (610 mm) in width. Lintels with uniform loading shall conform to Sections R608.8.2.1 and R608.8.2.2, or Section R608.8.2.3. Lintels supporting concentrated loads, such as from roof or floor beams or girders, shall be designed in accordance with ACI 318.
R608.8.2.1 Lintels designed for gravity load-bearing conditions. Where a lintel will be subjected to gravity load conditions 1 through 5 of Table R608.8(1), the clear span of the lintel shall not exceed that permitted by Tables R608.8(2) through R608.8(8). The maximum clear span of lintels with and without stirrups in flat walls shall be determined in accordance with Tables R608.8(2) through R608.8(5), and constructed in accordance with Figure R608.8(2).
CRC § 7.2.2.2 Medium relevance — show source text
The vertical reinforcement required on each side of an opening by this section is permitted to serve as reinforcement at the ends of solid wall segments in accordance with Section R608.7.2.2.2, provided it is located as required by the applicable detail in Figure R608.7.1.1(2). Where the vertical reinforcement required by this section is used to satisfy the requirements of Section R608.7.2.2.2 in waffle- and screen-grid walls, a concrete flange shall be created at the ends of the solid wall segments in accordance with Table R608.7.1.1(6), Note e. In the top-most story, the reinforcement shall terminate in accordance with Section R608.6.4.
R608.8.2 Lintels. Lintels shall be provided over all openings equal to or greater than 2 feet (610 mm) in width. Lintels with uniform loading shall conform to Sections R608.8.2.1 and R608.8.2.2, or Section R608.8.2.3. Lintels supporting concentrated loads, such as from roof or floor beams or girders, shall be designed in accordance with ACI 318.
R608.8.2.1 Lintels designed for gravity load-bearing conditions. Where a lintel will be subjected to gravity load conditions 1 through 5 of Table R608.8(1), the clear span of the lintel shall not exceed that permitted by Tables R608.8(2) through R608.8(8). The maximum clear span of lintels with and without stirrups in flat walls shall be determined in accordance with Tables R608.8(2) through R608.8(5), and constructed in accordance with Figure R608.8(2). The maximum clear span of lintels with and without stirrups in waffle-grid walls shall be determined in accordance with Tables R608.8(6) and R608.8(7), and constructed in accordance with Figure R608.8(3). The maximum clear span of lintels with and without stirrups in screen-grid walls shall be determined in accordance with Table R608.8(8), and constructed in accordance with Figure R608.8(4).
Where required by the applicable table, No. 3 stirrups shall be installed in lintels at a maximum spacing of d /2 where d equals the depth of the lintel, D, less the cover of the concrete as shown in Figures R608.8(2) through R608.8(4). The smaller value of d computed for the top and bottom bar shall be used to determine the maximum stirrup spacing. Where stirrups are required in a lintel with a single bar or two bundled bars in the top and bottom, they shall be fabricated like the letter “c” or “s” with 135-degree (2.36 rad) standard hooks at each end that comply with Section R608.5.4.5 and Figure R608.5.4(3) and installed as shown in Figures R608.8(2) through R608.8(4). Where two bars are required in the top and bottom of the lintel and the bars are not bundled, the bars shall be separated by not less than 1 inch (25 mm).
Frequently asked questions
Do I have to test every masonry wall assembly in a building?
No — § BG102.1.1 allows either a calculation per TMS 0302 or representative ASTM E90 laboratory testing of assemblies. Use a tested assembly or a calculated rating per TMS 0302 (or both as your strategy).
Is meeting ASTM unit standards (e.g., ASTM C90) sufficient for STC?
No — unit/material standards (ASTM C90, C62, etc.) address masonry materials, not the assembled STC. STC must be shown by ASTM E90 testing or TMS 0302 calculation as required by § BG102.1.1.
Appendix BG vs CBC — which STC applies?
Appendix BG (CRC) sets STC 45 for the appendix provisions (§ BG102.1). The CBC Section 1206 has its own thresholds (e.g., STC 50 in certain CBC contexts). Use the section that your enforcing jurisdiction has adopted.
The code references “TMS 0302” but I see “TMS 302—2018” in the referenced-standards table. Which is correct?
The appendix text uses the TMS reference in the requirements and the referenced-standards table lists the standard as TMS 302—2018. Treat TMS 302 (2018) as the masonry acoustics standard referenced by the code for calculating STC of masonry assemblies.
I can’t find § R608.1 in my upload — can you check it?
I could not locate a retrievable copy of § R608.1 in the uploaded CRC files; many R608 subsections (e.g., connection and reinforcement tables) appear in the files, but R608.1 specifically was not in the returned excerpts. Please upload or point me to the file that contains § R608.1 and I will cite it directly.
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