CBC · California Building Code

What special inspections are required for masonry and masonry veneer?

If your project uses structural masonry or masonry veneer, the CBC generally requires special inspections per §1705.4 following the TMS 402/602 QA program; glass‑unit masonry and veneer have Risk‑Category rules in §1705.4.1 and §1705A.4.1 that change whether inspections are required and whether Level 2 (periodic) or Level 3 inspection applies — check the code sections and any local/agency A‑chapter amendments before assuming veneer is exempt.

Ask a question free See coverage

Last reviewed: July 5, 2026

What the code requires — 2-4 sentences

The California Building Code (CBC) requires special inspections and tests for masonry construction to be performed in accordance with the quality‑assurance requirements of TMS 402 and TMS 602 (see the applicable Tables 3 and 4), and specifies additional testing (mortar/grout, cores, batch plant) and anchor inspection requirements. This general rule is set out in §1705.4 of the CBC. For glass‑unit masonry and masonry veneer the CBC contains separate Risk‑Category–based requirements in §1705.4.1 (and the A‑chapter equivalent §1705A.4.1) that modify when and at what TMS QA level inspections are required.

Requirements in detail

Governing sections and standards

  • General masonry special inspection: §1705.4 requires special inspections/tests in accordance with the quality‑assurance program requirements of TMS 402 and TMS 602 (Tables 3 and 4).
  • Glass‑unit masonry / masonry veneer (Risk Categories): §1705.4.1 and §1705A.4.1 set the Risk‑Category thresholds and require inspection per the specified TMS 602 quality‑assurance Level(s).

Inspection level / Risk‑category decision table

Construction type / Decision dimension Required special inspection level / action Code reference
Structural masonry (general: reinforced or otherwise covered by TMS 402/602) Special inspections and tests per TMS 402/TMS 602 quality‑assurance program (as set forth in Tables 3 & 4; Level 3 where indicated) §1705.4
Glass‑unit masonry or masonry veneer on a Risk Category IV structure Perform special inspections and tests in accordance with TMS 602 Level 2 §1705.4.1
Glass‑unit masonry or masonry veneer on Risk Category II or III (A‑chapter / certain agency amendments) State/agency A‑chapter requires TMS 602 Tables 3 & 4, Level 2 quality assurance for RC II, III, IV; footnote replacement requires periodic inspection for all veneer §1705A.4.1 and §1705A.4.1.1
Glass‑unit masonry or masonry veneer on Risk Category I, II or III (general CBC exception) Exception in §1705.4: special inspections and tests are not required for glass‑unit masonry or masonry veneer when part of a structure classified as RC I, II or III (note: agency amendments may override) §1705.4 (Exception)

Notes on the table: the CBC text includes both a general exception (no special inspection required for GU masonry or veneer in RC I–III) and separate subsections that require Level 2 inspection for GU masonry/veneer in higher Risk Categories or per agency A‑chapter rules — see the code text for the applicable local/agency rule that controls.

What the special inspector is expected to inspect / tests commonly required

  • Inspection per TMS 402/602 quality‑assurance program: as referenced in §1705.4, follow the TMS tables that list inspection tasks (reinforcement placement, grout placement, anchorage, mortar application, etc.).
  • Mortar and grout testing: modified TMS/ASTM requirements require sampling and testing at the start of work and at specified intervals (e.g., mortar samples on three successive days at start and weekly thereafter; grout sampled for each mix design each day it is placed and at least every 5,000 sq ft of masonry wall area) — see the masonry quality assurance and test mandates in Chapter 21/2105 as adopted/amended.
  • Prism method / compressive strength verification: the architect/engineer must provide a QA method acceptable to the enforcement agency; prism testing per TMS 602 Article 1.4B.3 is the verification method called out in the CBC.
  • Masonry core testing: the CBC requires coring (two cores per building for each 5,000 sq ft of masonry wall area or fraction thereof where specified) — see §2105.4.
  • Batch plant inspection of grout materials: required in accordance with §1705.3.3 and §1705.4 references batch plant inspection.

Frequency / continuous vs periodic

  • The CBC/TMS tables define whether an item is continuous special inspection or periodic special inspection; the statement of special inspections submitted with the project must identify which is required (§1704A.3.1). For veneer, the A‑chapter replacement footnote explicitly requires periodic special inspection for all veneer in some agency amendments (§1705A.4.1.1).

Post‑installed anchors and related items

  • Special inspection and testing of post‑installed anchors in masonry is required in accordance with the requirements for concrete anchors in Chapters 17 and 19 (see §1705.4 and §1705A.4).

Exceptions & special cases

  • General CBC exception: §1705.4 contains an exception stating that special inspections/tests shall not be required for glass‑unit masonry or masonry veneer when they are part of a structure classified as Risk Category I, II or III. Check the local enforcement/agency amendments before assuming exemption.
  • Agency A‑chapter modifications: §1705A.4.1 (and §1705A.4.1.1) can change the Risk‑Category applicability (for example, requiring TMS 602 Level 2 for GU masonry and veneer in RC II, III or IV and requiring periodic inspection for all veneer). If your project is subject to the A‑chapter (state agency) rules, those provisions control.
  • Seismic / SD category effects: separate A‑chapter seismic inspection requirements and architectural component inspection rules (periodic inspections of cladding/veneer) apply for structures in certain Seismic Design Categories — see §1705A.13.5 and related seismic sections for additional periodic inspection triggers.

Common mistakes

  • Assuming veneer is always exempt: the exception in §1705.4 may suggest veneer in RC I–III is exempt, but agency amendments (§1705A.4.1) and TMS footnote changes may reimpose inspection (especially for veneers on RC II–IV). Always verify which edition and local amendments apply.
  • Omitting mortar/grout sampling and core testing: Chapter 21/2105 contains specific sampling frequency and prism/core requirements that projects often miss when relying only on the general TMS reference in §1705.4.
  • Not identifying inspection scope in the statement of special inspections: the statement must list items, type/extent and whether continuous or periodic per §1704A.3.1; failing to do so causes enforcement delays.
  • Overlooking post‑installed anchor inspection: anchors in masonry are treated like concrete anchors for special inspection/testing and must be addressed in the special inspection program.

Worked example — applying the rule with numbers

Scenario: A new hospital (Risk Category IV) will receive anchored masonry veneer façade on exterior walls totaling 12,000 sq ft.

Apply the CBC:

  1. Determine governing section: hospital = Risk Category IV → §1705.4.1 requires glass‑unit masonry or masonry veneer in RC IV to be inspected per TMS 602 Level 2. §1705.4.1.1 (TMS footnote replacement) also requires periodic inspection for all veneer where that amendment applies.
  2. Mortar/grout sampling: per Chapter 21 (2105.3), grout samples must be taken for each mix design each day grout is placed and not less than every 5,000 sq ft of masonry wall area. For 12,000 sq ft that is at least 3 grout samples (one per mix design/day and at least one per 5,000 sq ft → two locations plus additional samples if placed on multiple days). Mortar sampling at start: at least one test sample on 3 successive working days at start and weekly thereafter (unless prism method used).
  3. Core testing: per §2105.4 two cores shall be taken from each building for each 5,000 sq ft of masonry wall area or fraction thereof — for 12,000 sq ft that implies (2 cores per 5,000 sf) → minimum 4–6 cores as directed by the registered design professional and approved agency.
  4. Special inspector duties: the periodic special inspector (per Level 2 designation) will perform the TMS 602 listed periodic tasks (placement, anchorage, ties, flashing, mortar/grout handling, connection to backup, etc.) and report per the statement of special inspections. Also arrange batch plant inspection of grout materials per §1705.3.3/§1705.4.

Related provisions (select)

  • §1705.4 — Masonry construction (general special inspection requirement).
  • §1705.4.1 — Glass unit masonry and masonry veneer (Risk Categories & TMS 602 Level references).
  • §1705A.4.1 and §1705A.4.1.1 — A‑chapter (agency) rules requiring TMS 602 Level 2 for GU masonry/veneer in specified Risk Categories and requiring periodic inspection for all veneer.
  • §2105 (Chapter 21 / quality assurance) — mortar, grout, prism and core testing requirements used to verify masonry strength during construction.
  • Chapter 14 (masonry veneer) — design & installation rules for veneer and referenced inspection tolerances and materials provisions.
  • §1704A.3.1 — Content of the statement of special inspections (what the owner must submit identifying types/extent of inspections).

Code references

Grounded in the retrieved California Building Code — click a citation to read the verbatim passage:

  • CBC § 1705.4 High relevance — show source text

    5 shall be demonstrated by the mockup panels. The equipment used_ in preconstruction testing shall be the same equipment used in the work requiring such testing, unless substitute equipment is approved by the building official. Reports of preconstruction tests shall be submitted to the building official as specified in Section 1704.5.

    1705.4 Masonry construction. Special inspections and tests of masonry construction shall be performed in accordance with the quality assurance program requirements of TMS 402 and TMS 602. [OSHPD 1R, 2 & 5] as set forth in Tables 3 and 4, Level 3 require- ments and Chapter 21. Testing shall be performed in accordance with Section 2105. Special inspection and testing of post-installed anchors in masonry shall be required in accordance with requirements for concrete in Chapters 17 and 19. Batch plant inspection of grout materials shall be in accordance with Section 1705.3.3.

    Exception: [OSHPD 1R, 2 & 5] Not permitted by OSHPD. Special inspections and tests shall not be required for:

    1. Glass unit masonry or masonry veneer designed in accordance with Section 2110 or Chapter 14, respectively, where they are part of a structure classified as Risk Category I, II or III.
    2. Masonry foundation walls constructed in accordance with Table 1807.1.6.3(1), 1807.1.6.3(2), 1807.1.6.3(3) or 1807.1.6.3(4).
    3. Masonry fireplaces, masonry heaters or masonry chimneys installed or constructed in accordance with Section 2111, 2112 or 2113, respectively.

    1705.4.1 Glass unit masonry and masonry veneer in Risk Category IV. Special inspections and tests for glass unit masonry or masonry veneer designed in accordance with Section 2110 or Chapter 14, respectively, where they are part of a structure classified as Risk Category IV shall be performed in accordance with TMS 602 Level 2. [OSHPD 1R, 2 & 5] Not permitted by OSHPD.

    [OSHPD 1R, 2 & 5] Glass unit masonry and masonry veneer in Risk Category II, III or IV. Special inspections and tests for glass unit masonry or masonry veneer designed by Section 2110 or Chapter 14, respectively, in structures classified as Risk Category II, III or IV, shall be performed in accordance with TMS 602 Tables 3 and 4, Level 2 Quality Assurance.

    1705.4.1.1 TMS 602 Section 1.6 Quality Assurance. [OSHPD 1R, 2 & 5] Replace footnote (d) as follows: (d) Periodic special inspection is required for all veneer.

    1705.4.2 Vertical masonry foundation elements. Special inspections and tests of vertical masonry foundation elements shall be performed in accordance with Section 1705.4.

    1705.5 Wood construction. Special inspections of prefabricated wood structural elements and assemblies shall be in accordance with Section 1704.2.5. Special inspections of site-built assemblies shall be in accordance with this section.

  • CBC § 1705A.3.9.2 High relevance — show source text

    1705A.3.9.2 Preconstruction tests. A shotcrete mockup panel shall be shot, cured, cored or sawn, examined and tested prior to commencement of the project. The mockup panel shall be representative of the project and simulate job conditions as closely as possible. The mockup panel thickness and reinforcing shall reproduce the thickest and most congested area specified in the struc- tural design. It shall be shot at the same angle, using the same nozzleman and with the same concrete mix design that will be used on the project. Adequate encasement of bars larger than No. 5 shall be demonstrated by the mockup panel. The equipment used in preconstruction testing shall be the same equipment used in the work requiring such testing, unless substitute equipment is approved by the building official. Reports of preconstruction tests shall be submitted to the building official as specified in Section 1704A.5. Approval from the enforcement agency must be obtained prior to performing shotcrete mockup panels.

    1705 A .4 Masonry construction. Special inspections and tests of masonry construction shall be performed in accordance with the quality assurance program requirements of TMS 402 and TMS 602, as set forth in Tables 3 and 4, Level 3 requirements and Chapter 21A. Testing shall be performed in accordance with Section 2105A ([DSA-SS/CC] 2115.8). Special inspection and testing of post-installed anchors in masonry shall be required in accordance with requirements for concrete in Chapters 17A and 19A. Batch plant inspection of grout materials shall be in accordance with Section 1705A.3.3.

    1705 A .4.1 Glass unit masonry and masonry veneer in Risk Category II, III or IV. Special inspections and tests for glass unit masonry or masonry veneer designed in accordance with Section 2110 A or Chapter 14, respectively, where they are part of a structure classified as Risk Category II, III or IV shall be performed in accordance with TMS 602 Tables 3 and 4, Level 2.

    1705A.4.1.1 TMS 602 Section 1.6 Quality Assurance. Replace footnote (d) in TMS 602 Table 4 as follows:

    (d) Periodic special inspection is required for all veneer.

    1705 A .4.2 Vertical masonry foundation elements. Special inspections and tests of vertical masonry foundation elements shall be performed in accordance with Section 1705 A .4.

    1705 A .5 Wood construction. Special inspections of prefabricated wood structural elements and assemblies shall be in accordance with Section 1704 A .2.5 except as modified in this section . Special inspections of site-built assemblies shall be in accordance with this section.

  • CBC § 1705.4.1 High relevance — show source text

    1705.4.1 Glass unit masonry and masonry veneer in Risk Category IV. Special inspections and tests for glass unit masonry or masonry veneer designed in accordance with Section 2110 or Chapter 14, respectively, where they are part of a structure classified as Risk Category IV shall be performed in accordance with TMS 602 Level 2. [OSHPD 1R, 2 & 5] Not permitted by OSHPD.

    [OSHPD 1R, 2 & 5] Glass unit masonry and masonry veneer in Risk Category II, III or IV. Special inspections and tests for glass unit masonry or masonry veneer designed by Section 2110 or Chapter 14, respectively, in structures classified as Risk Category II, III or IV, shall be performed in accordance with TMS 602 Tables 3 and 4, Level 2 Quality Assurance.

    1705.4.1.1 TMS 602 Section 1.6 Quality Assurance. [OSHPD 1R, 2 & 5] Replace footnote (d) as follows: (d) Periodic special inspection is required for all veneer.

    1705.4.2 Vertical masonry foundation elements. Special inspections and tests of vertical masonry foundation elements shall be performed in accordance with Section 1705.4.

    1705.5 Wood construction. Special inspections of prefabricated wood structural elements and assemblies shall be in accordance with Section 1704.2.5. Special inspections of site-built assemblies shall be in accordance with this section.

    1705.5.1 High-load diaphragms. High-load diaphragms designed in accordance with Section 2306.2 shall be installed with special inspections as indicated in Section 1704.2. The special inspector shall inspect the wood structural panel sheathing to ascertain whether it is of the grade and thickness shown on the approved construction documents. Additionally, the special inspector must verify the nominal size of framing members at adjoining panel edges, the nail or staple diameter and length, the number of fastener lines and that the spacing between fasteners in each line and at edge margins agrees with the approved construction documents.

    1705.5.2 Metal-plate-connected wood trusses spanning 60 feet or greater. Where a truss clear span is 60 feet (18 288 mm) or greater, the special inspector shall verify that the temporary installation restraint/bracing and the permanent individual truss member restraint/bracing are installed in accordance with the approved truss submittal package.

    1705.5.3 Mass timber construction. Special inspections of mass timber elements in Types IV-A, IV-B and IV-C construction shall be in accordance with Table 1705.5.3.

    2025 CALIFORNIA BUILDING CODE 17-11

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    SPECIAL INSPECTIONS AND TESTS

    TABLE 1705.5.3—REQUIRED SPECIAL INSPECTIONS OF MASS TIMBER CONSTRUCTION Col2 Col3 Col4 Col5
    TYPE TYPE TYPE CONTINUOUS
    SPECIAL INSPECTION    		 PERIODIC SPECIAL
    INSPECTION
    1. Inspection of anchorage and connections of mass timber construction to timber deep
    foundation systems.
  • CBC § 1705.3.9.1 High relevance — show source text

    1705.3.9.1 Visual examination for structural soundness of in-place shotcrete. Completed shotcrete work shall be checked visu- ally for reinforcing bar embedment, voids, rock pockets, sand streaks and similar deficiencies by examining a minimum of three 3- inch (76 mm) cores taken from three areas chosen by the design engineer which represent the worst congestion of reinforcing bars occurring in the project. Extra reinforcing bars may be added to noncongested areas and cores may be taken from these areas. The cores shall be examined by the special inspector and a report submitted to the enforcement agency prior to final approval of the shotcrete.

    Exception: Shotcrete work fully supported on earth, minor repairs, and when, in the opinion of the enforcement agency, no special hazard exists.

    1705.3.9.2 Preconstruction tests. A shotcrete mockup panel shall be shot, cured, cored or sawn, examined and tested prior to commencement of the project. The mockup panel shall be representative of the project and simulate job conditions as closely as possible. The mockup panel thickness and reinforcing shall reproduce the thickest and most congested area specified in the struc- tural design. It shall be shot at the same angle, using the same nozzleman and with the same concrete mix design that will be used on the project. Adequate encasement of bars larger than No. 5 shall be demonstrated by the mockup panels. The equipment used in preconstruction testing shall be the same equipment used in the work requiring such testing, unless substitute equipment is approved by the building official. Reports of preconstruction tests shall be submitted to the building official as specified in Section 1704.5.

    1705.4 Masonry construction. Special inspections and tests of masonry construction shall be performed in accordance with the quality assurance program requirements of TMS 402 and TMS 602. [OSHPD 1R, 2 & 5] as set forth in Tables 3 and 4, Level 3 require- ments and Chapter 21. Testing shall be performed in accordance with Section 2105. Special inspection and testing of post-installed anchors in masonry shall be required in accordance with requirements for concrete in Chapters 17 and 19. Batch plant inspection of grout materials shall be in accordance with Section 1705.3.3.

    Exception: [OSHPD 1R, 2 & 5] Not permitted by OSHPD. Special inspections and tests shall not be required for:

    1. Glass unit masonry or masonry veneer designed in accordance with Section 2110 or Chapter 14, respectively, where they are part of a structure classified as Risk Category I, II or III.
    2. Masonry foundation walls constructed in accordance with Table 1807.1.6.3(1), 1807.1.6.3(2), 1807.1.6.3(3) or 1807.1.6.3(4).
    3. Masonry fireplaces, masonry heaters or masonry chimneys installed or constructed in accordance with Section 2111, 2112 or 2113, respectively.
  • CBC § 2.1 High relevance — show source text

    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 .

    2025 CALIFORNIA BUILDING CODE 21A-3

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    �

    �

    �

    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

    2103 A .1 Masonry units. Concrete masonry units, clay or shale masonry units, stone masonry units, glass unit masonry shall comply with Article 2.3 of TMS 602. Architectural cast stone shall conform to TMS 504. Architectural cast stone construction shall be considered as an alternative system.

    Exception: Structural clay tile for nonstructural use in fireproofing of structural members and in wall furring shall not be required to meet the compressive strength specifications. The fire-resistance rating shall be determined in accordance with ASTM E119 or UL 263 and shall comply with the requirements of Table 705.5.

    2103 A .1.1 Second-hand units. Second-hand masonry units shall not be reused unless they conform to the requirements of new units. The units shall be of whole, sound materials and free from cracks and other defects that will interfere with proper laying or use. Old mortar shall be cleaned from the unit before reuse.

    2103 A .2 Mortar. Mortar for masonry construction shall comply with Section 2103 A .2.1, 2103 A .2.2, 2103 A .2.3 or 2103 A .2.4.

    2103 A .2.1 Masonry mortar. Mortar for use in masonry construction shall conform to Articles 2.1 and 2.6 A of TMS 602.

    2103 A .2.2 Surface-bonding mortar. Surface-bonding mortar shall comply with ASTM C887. Surface bonding of concrete masonry units shall comply with ASTM C946.

  • CBC § 4.1 High relevance — show source text

    1705 A .4.1 Glass unit masonry and masonry veneer in Risk Category II, III or IV. Special inspections and tests for glass unit masonry or masonry veneer designed in accordance with Section 2110 A or Chapter 14, respectively, where they are part of a structure classified as Risk Category II, III or IV shall be performed in accordance with TMS 602 Tables 3 and 4, Level 2.

    1705A.4.1.1 TMS 602 Section 1.6 Quality Assurance. Replace footnote (d) in TMS 602 Table 4 as follows:

    (d) Periodic special inspection is required for all veneer.

    1705 A .4.2 Vertical masonry foundation elements. Special inspections and tests of vertical masonry foundation elements shall be performed in accordance with Section 1705 A .4.

    1705 A .5 Wood construction. Special inspections of prefabricated wood structural elements and assemblies shall be in accordance with Section 1704 A .2.5 except as modified in this section . Special inspections of site-built assemblies shall be in accordance with this section.

    1705 A .5.1 High-load diaphragms. High-load diaphragms designed in accordance with Section 2306.2 or 2307.1 shall be installed with special inspections as indicated in Section 1704 A .2. The special inspector shall inspect the wood structural panel sheathing to ascertain whether it is of the grade and thickness shown on the approved construction documents. Additionally, the special inspector must verify the nominal size of framing members at adjoining panel edges, the nail or staple diameter and length, the number of fastener lines and that the spacing between fasteners in each line and at edge margins agrees with the approved construction documents.

    1705 A .5.2 Metal-plate-connected wood trusses spanning 60 feet or greater. Where a truss clear span is 60 feet (18 288 mm) or greater, the special inspector shall verify that the temporary installation restraint/bracing and the permanent individual truss member restraint/bracing are installed in accordance with the approved truss submittal package.

    1705 A .5.3 Mass timber construction. Special inspections of mass timber elements in Types IV-A, IV-B and IV-C construction shall be in accordance with Table 1705 A .5.3.

    2025 CALIFORNIA BUILDING CODE 17A-13

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    SPECIAL INSPECTIONS AND TESTS

    TABLE 1705A.5.3—REQUIRED SPECIAL INSPECTIONS OF MASS TIMBER CONSTRUCTION Col2 Col3 Col4
    TYPE TYPE CONTINUOUS
    SPECIAL
    INSPECTION    		 PERIODIC
    SPECIAL
    INSPECTION
    1. Inspection of anchorage and connections of mass timber construction to timber deep foundation
    systems.    		 — X
    2. Inspect erection of mass timber construction. — X
    3. Inspection of connections where installation methods are required to meet design loads.
    _3.1.
  • CBC § 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.

  • CBC § 1.10.1. High relevance — show source text

    [OSHPD 1R ] - For applications listed in Section 1.10.1.

    [OSHPD 2] - For applications listed in Section 1.10.2.

    [OSHPD 5] - For applications listed in Section 1.10.5.

    2101.1.4 Reference to other chapters. [DSA-SS/CC] Where reference within this chapter is made to sections in Chapters 17 and 18, the provisions in Chapters 17A and 18A respectively shall apply instead.

    2101.1.5 Additional amendments. [DSA-SS/CC] See Section 2115 for additional requirements.

    2101.2 Design methods. Masonry shall comply with the provisions of TMS 402, TMS 403 or TMS 404 as well as applicable requirements of this chapter. [OSHPD 1R, 2 & 5] TMS 403 Not permitted by OSHPD.

    2101.2.1 Masonry veneer. Masonry veneer shall comply with the provisions of Chapter 14.

    2101.2.2 Prohibition. [OSHPD 1R, 2 & 5] The following design methods, systems and materials in TMS402/602 are not permitted by 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.

    2101.3 Special inspection. The special inspection of masonry shall be as defined in Chapter 17, or an itemized testing and inspection program shall be provided that meets or exceeds the requirements of Chapter 17.

    2025 CALIFORNIA BUILDING CODE 21-3

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    �

    �

    MASONRY

    SECTION 2102—NOTATIONS

    2102.1 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—MASONRY CONSTRUCTION MATERIALS

  • CBC § 1705A.2.9 High relevance — show source text

    [DSA-SS, DSA-SS/CC] Requirements specified in Section 1705A.2.9 shall also apply.

    1705 A .13.4 Special inspection for special seismic certification . For structures assigned to Seismic Design Category D, E or F, the special inspector shall examine equipment and components requiring special seismic certification in accordance with Section 1705A.14.3 or ASCE 7 , Section 13.2.3 and verify that the label, anchorage and mounting conform to the certificate of compliance.

    1705 A .13.5 Architectural components. Periodic special inspection is required for the erection and fastening of exterior cladding, interior and exterior nonbearing walls, ceilings and interior and exterior veneer in structures assigned to Seismic Design Category D, E or F.

    [OSHPD 1] E x ception: Periodic special inspection is not required where continuous inspection of the work is performed in accor- dance with Section 7-145 of the CAC .

    1705 A .13.5.1 Access floors. Periodic special inspection is required for the anchorage of access floors in structures assigned to Seismic Design Category D, E or F.

    1705A.13.5.2 Structural sealant glazing. Special inspection shall be in accordance with Section 2410.1.2 Item 9.

    1705 A .13.6 Plumbing, mechanical and electrical components. Periodic special inspection of plumbing, mechanical and electrical components shall be required for the following:

    1. Anchorage of electrical equipment for emergency and standby power systems in structures assigned to Seismic Design Category D, E or F.
    2. Anchorage of other electrical equipment in structures assigned to Seismic Design Category D, E or F.
    3. Installation and anchorage of piping systems designed to carry hazardous materials and their associated mechanical units in structures assigned to Seismic Design Category D, E or F.
    4. Installation and anchorage of ductwork designed to carry hazardous materials in structures assigned to Seismic Design Category D, E or F.
    5. Installation and anchorage of vibration isolation systems in structures assigned to Seismic Design Category D, E or F where the approved construction documents require a nominal clearance of [1] / 4 inch (6.4 mm) or less between the equipment support frame and restraint.
    6. Installation of mechanical and electrical equipment, including duct work, piping systems and their structural supports, where automatic sprinkler systems are installed in structures assigned to Seismic Design Category D, E or F to verify one of the following: 6.1. Minimum clearances have been provided as required by Section 13.2.4 ASCE/SEI 7. 6.2. A nominal clearance of not less than 3 inches (76 mm) has been be provided between automatic sprinkler system drops and sprigs and: structural members not used collectively or independently to support the sprinklers; equipment attached to the building structure; and other systems’ piping.

    Where flexible sprinkler hose fittings are used, special inspection of minimum clearances is not required.

    2025 CALIFORNIA BUILDING CODE 17A-17

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    SPECIAL INSPECTIONS AND TESTS

  • CBC § 1705.13.4 High relevance — show source text

    1705.13.4 Designated seismic systems. For structures assigned to Seismic Design Category C, D, E or F, the special inspector shall examine designated seismic systems requiring seismic qualification in accordance with Section 13.2.3 of ASCE 7 and verify that the label, anchorage and mounting conform to the certificate of compliance.

    1705.13.5 Architectural components. Periodic special inspection is required for the erection and fastening of exterior cladding, interior and exterior nonbearing walls and interior and exterior veneer in structures assigned to Seismic Design Category D, E or F.

    Exception: Periodic special inspection is not required for the following:

    1. Exterior cladding, interior and exterior nonbearing walls and interior and exterior veneer 30 feet (9144 mm) or less in height above grade or walking surface.
    2. Exterior cladding and interior and exterior veneer weighing 5 psf (0.24 kN/m [2] ) or less.
    3. Interior nonbearing walls weighing 15 psf (0.72 kN/m [2] ) or less.

    1705.13.5.1 Access floors. Periodic special inspection is required for the anchorage of access floors in structures assigned to Seismic Design Category D, E or F.

    1705.13.6 Plumbing, mechanical and electrical components. Periodic special inspection of plumbing, mechanical and electrical components shall be required for the following:

    1. Anchorage of electrical equipment for emergency and standby power systems in structures assigned to Seismic Design Category C, D, E or F.
    2. Anchorage of other electrical equipment in structures assigned to Seismic Design Category E or F.
    3. Installation and anchorage of piping systems designed to carry hazardous materials and their associated mechanical units in structures assigned to Seismic Design Category C, D, E or F.
    4. Installation and anchorage of ductwork designed to carry hazardous materials in structures assigned to Seismic Design Category C, D, E or F.
    5. Installation and anchorage of vibration isolation systems in structures assigned to Seismic Design Category C, D, E or F where the approved construction documents require a nominal clearance of [1] / 4 inch (6.4 mm) or less between the equipment support frame and restraint.

    2025 CALIFORNIA BUILDING CODE 17-15

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    SPECIAL INSPECTIONS AND TESTS

    1. Installation of mechanical and electrical equipment, including duct work, piping systems and their structural supports, where automatic sprinkler systems are installed in structures assigned to Seismic Design Category C, D, E or F to verify one of the following: 6.1. Minimum clearances have been provided as required by Section 13.2.4 ASCE/SEI 7. 6.2. A nominal clearance of not less than 3 inches (76 mm) has been be provided between automatic sprinkler system drops and sprigs and: structural members not used collectively or independently to support the sprinklers; equipment attached to the building structure; and other systems’ piping.

    Where flexible sprinkler hose fittings are used, special inspection of minimum clearances is not required.

    1705.13.7 Storage racks. Steel storage racks and steel cantilevered storage racks that are 8 feet (2438 mm) in height or greater and assigned to Seismic Design Category D, E or F shall be provided with periodic special inspection as required by Table 1705.13.7.

  • CBC § 2.6 High relevance — show source text

    Fire district D102.2.6, D102.1 Fire-resistance ratings 703, 705.5, Table 705.5, 706.5.1, 707.4, 1402.4 Flashing, veneered walls 1404.11.1, 1404.4

    Foam plastic insulation 2603.4.1.4, 2603.5 Glazing, rated 715.8 Joints 705.10, 714 Light-transmitting plastic panels 2607 Materials 705.4, 1403.1, 1405 Metal composite material (MCM) 1406 Nonbearing Chapter 6 Opening protection 705.11, 705.9, 716.2.5.4

    Parapets 705.12 Performance requirements 1402 Projections 705.2 Structural stability 705.7 Vapor retarders 1404.3 Veneer (see Veneer) Weather resistance 1402.2, 1404.2, 1406.6, 1407.4 Weather-resistant barriers 1404.2 Wall, Fire (see Fire Walls) Wall, Foundation (see Foundations) Wall, Interior Finishes 803, 1210.2 Opening protection 716, 717 Wall, Interior Nonbearing (See Partitions) Wall, Masonry 202 Wood Contact 2304.12.1.3,

    2304.12.2.1

    Wall, Parapet 705.12, 1503.3, 2109.2.4.3 Wall, Party (See Fire Walls) Wall, Penetrations 714.4 Wall, Retaining (See Retaining Wall) Wall, Veneered (See Veneer) Chapter 14 Wall, Wood Construction Bracing 2308.10 Cripple walls 2308.9.6 Cutting, notching and boring of dimensional wood framing 2308.6 Exterior framing 2308.9 Fastening schedule Table 2304.10.2 Framing 2304.3, 2308.9 Hillside light-frame construction 2308.2.7 Interior bearing partition 2308.9.4 Interior nonbearing partition 2308.9.1 Openings 2308.9.5 Shear walls 2305.1, 2306.3 Sheathing (see Sheathing) Studs 2308.9.1 Top plates 2308.9.3.2 Waste, Construction 420.12 Water-Reactive Materials Table 307.1(1), 307.4, 307.5. 415.8.4

    Weather Protection

    Exterior walls 1404.2

    Roofs 1503 Welding Materials, verification of steel reinforcement 1705.3.2 Special inspections 1705.13.3, 1705.2, 1705.3.1 Splices of reinforcement in masonry 2107.3, 2108.3 Wildland-Urban Interface 101.4.8

    Wind Load 1609 Basic design wind speed 1609.3 Construction documents

    107, 1603.1.4 Exposure category 1609.4 Glazing 1609.2, 2404 Hurricane 1507.1.1 Masonry,

  • CBC § 3.1 High relevance — show source text

    [DSA-SS, DSA-SS/CC] The exception is not permitted by DSA.

    1704 A .3.1 Content of statement of special inspections. The statement of special inspections shall identify the following:

    1. The materials, systems, components and work required to have special inspections or tests by the building official or by the registered design professional responsible for each portion of the work.

    2. The type and extent of each special inspection.

    3. The type and extent of each test.

    4. Additional requirements for special inspections or tests for seismic or wind resistance as specified in Sections 1705 A .12, 1705 A .13 and 1705 A .14.

    5. For each type of special inspection, identification as to whether it will be continuous special inspection, periodic special inspection or performed in accordance with the notation used in the referenced standard where the inspections are defined.

    6. Deferred submittal items that require a supplemental statement of special inspections.

    1704 A .3.2 Seismic requirements in the statement of special inspections. Where Section 1705 A .13 or 1705 A .14 specifies special inspections or tests for seismic resistance, the statement of special inspections shall identify the equipment/components that require special seismic certification and seismic force-resisting systems that are subject to the special inspections or tests.

    1704 A .3.3 Wind requirements in the statement of special inspections. Where Section 1705 A .12 specifies special inspection for wind resistance, the statement of special inspections shall identify the main windforce-resisting systems and wind-resisting components that are subject to special inspections.

    2025 CALIFORNIA BUILDING CODE 17A-5

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    �

    �

    �

    �

    �

    �

    SPECIAL INSPECTIONS AND TESTS

    1704 A .4 Contractor responsibility. Each contractor responsible for the construction of a main wind- or seismic force-resisting system, installation of equipment/components requiring special seismic certification or a wind- or seismic force-resisting component listed in the statement of special inspections shall submit a written statement of responsibility to the building official and the owner or the owner’s authorized agent prior to the commencement of work on the system or component. The contractor’s statement of responsibility shall contain acknowledgement of awareness of the special requirements contained in the statement of special inspections. [DSA-SS, DSA-SS/CC] The contractor’s statement is required only when specified on the approved construction documents.

    1704 A .5 Submittals to the building official. In addition to the submittal of reports of special inspections and tests in accordance with Section 1704 A .2.4, reports and certificates shall be submitted by the owner or the owner’s authorized agent to the building official for each of the following:

    1. Reserved.

    2. Reserved.

    3. Certificates of compliance for equipment/components requiring special seismic certification in accordance with Section 1705 A .14.3.

    4. Reports of preconstruction tests for shotcrete in accordance with ACI 318 and Section 1705A.3.9.2.

    5. Certificates of compliance for open web steel joists and joist girders in accordance with Section 2207 A. 5.

Frequently asked questions

When is masonry veneer exempt from special inspection?

The CBC exception in §1705.4 states that glass‑unit masonry or masonry veneer need not have special inspections when part of structures classified as Risk Category I, II or III; however, agency A‑chapter amendments (for some jurisdictions) may require inspections for certain Risk Categories — always confirm applicable local/agency amendments before assuming exemption.

What TMS quality‑assurance level applies to structural masonry?

Structural masonry special inspections are performed in accordance with the TMS 402/TMS 602 quality‑assurance program as referenced in §1705.4; the CBC points to the TMS tables (Tables 3 & 4) which indicate the specific Level (Level 3 where shown).

Are mortar and grout tested during construction?

Yes. Chapter 21 (2105.3 and related subsections) sets out mortar and grout sampling/testing frequency (e.g., mortar samples at start and weekly; grout samples each day and at least every 5,000 sq ft) and permits use of prism testing per TMS 602 when that method is used.

Who decides whether inspection is continuous or periodic?

The statement of special inspections (per §1704A.3.1) must identify for each listed inspection whether it is continuous or periodic; TMS tables and any A‑chapter replacement footnotes (for veneer, etc.) also define which tasks are periodic or continuous.

Do anchors installed into masonry need special inspection?

Yes. §1705.4 requires special inspection/testing of post‑installed anchors in masonry in accordance with the requirements for anchors in concrete as contained in Chapters 17 and 19.

More in California Building Code

Ask about the CBC

Get cited, plain-English answers on the California Building Code for your project — any code section, any scenario.

Start Free Trial

Related in the CBC

What special inspections and nondestructive tests are required for steel construction?

What inspections and tests are required for concrete construction?

When are special inspections required for wood and mass timber construction?

Material- and System‑Specific Required Special Inspections

California Building Code