CBC · California Building Code
Where and how must flashing and parapet coping be installed to prevent water intrusion?
Flashing must be installed at roof/wall intersections, gutters, slope changes and penetrations and metal flashings must be corrosion‑resistant and at least 0.019 in. thick; parapet tops must be sloped for positive drainage and parapet coping for fire‑rated walls must be weatherproof, at least as wide as the parapet thickness and must not reduce the wall’s fire rating (CBC §§ 1503.2, 1503.3, 1503.3.1) .
Last reviewed: July 5, 2026
What the code requires — 2–4 sentences
Flashing must be installed wherever it is needed to prevent water from entering walls and roof assemblies — at roof/wall intersections, gutters, changes in slope, roof penetrations and similar locations — and metal flashing must be corrosion‑resistant and at least 0.019 in. thick (§ 1503.2; § 1503.2.1) . Parapet walls must be coped or covered and the parapet top must provide positive drainage; where parapets are required to have a fire‑resistance rating, the coping or cover must be weatherproof, at least as wide as the parapet thickness, and must not reduce the wall’s rated assembly (§ 1503.3; § 1503.3.1) .
Requirements in detail
1) Purpose and general rule
- Flashing is a means of preventing water entry at joints, through moisture‑permeable materials, and at intersections and penetrations in the roof plane; it must be installed so water does not enter the wall or roof (§ 1503.2) .
2) Where flashing is required
- Required locations include, at minimum: wall/roof intersections, gutters, wherever the roof slope or direction changes, around roof openings and other penetrations, and at the perimeters of openings and copings (§ 1503.2; § 1503.2.1) .
3) Materials and minimum sizing
- If metal flashing is used it must be corrosion‑resistant and have a minimum thickness of 0.019 inch (0.483 mm) — No. 26 galvanized sheet (§ 1503.2.1) .
- Parapet coping or cover must be weatherproof; for parapets required by § 705.12 (fire‑resistance‑rated parapets) coping/cover width must be not less than the thickness of the parapet wall and must not reduce the wall’s fire‑resistance rating (§ 1503.3; § 1503.3.1) .
4) Drainage
- The top surface of the parapet wall must provide positive drainage (i.e., slope or detail that sheds water away from the wall) (§ 1503.3) .
Decision‑relevant table
| Decision factor | Required value / condition | Code Reference |
|---|---|---|
| Flashing required locations | Wall/roof intersections, gutters, changes in roof slope/direction, around roof openings, other penetrations | § 1503.2; § 1503.2.1 |
| Metal flashing minimum thickness | ≥ 0.019 in. (0.483 mm) (No. 26 galvanized) and corrosion‑resistant | § 1503.2.1 |
| Parapet coping width (fire‑rated parapets) | Not less than the thickness of the parapet wall | § 1503.3.1; § 1503.3 |
| Parapet top condition | Must provide positive drainage | § 1503.3 |
| Coping material for fire‑rated parapets | Weatherproof material that does not decrease the wall’s fire‑resistance rating | § 1503.3.1 |
Exceptions & special cases
- The code text at § 1503.3.1 ties coping width and material to parapets that are required by § 705.12 (fire‑resistance requirement); for parapets that fall under exceptions in § 705.12 a different subsection (§ 1503.3.2) applies — consult those sections if your parapet is one of the exceptions (§ 1503.3.1; § 1503.3) .
- The CBC requires flashing be corrosion‑resistant and sets a minimum metal thickness; it does not, in these sections, prescribe particular attachment details, slopes, or drip dimensions — those are typically addressed by manufacturer instructions, accepted details, or other CBC sections and referenced standards (see Related provisions below) (§ 1503.2; § 1503.2.1) .
- If using non‑metal flashings (self‑adhered or fluid‑applied), follow applicable product standards and manufacturer instructions; the CBC’s § 1503 series establishes locations and basic material constraints but relies on referenced standards for product performance (§ 1503.2) .
Common mistakes
- Failing to install flashing at all required locations (e.g., only flashing the sill but not the head/side conditions at window/door openings) — § 1503.2 requires flashing at intersections and openings .
- Using metal thinner than 0.019 in. or non‑corrosion‑resistant metal for exposed flashing details — § 1503.2.1 sets the minimum thickness and corrosion requirement .
- Installing coping that is narrower than the parapet thickness or that compromises the fire rating of a fire‑resistance‑rated parapet — § 1503.3.1 requires coping width ≥ parapet thickness and that the coping not decrease the wall’s rating .
- Not providing positive slope/drainage on parapet tops so water ponds against the coping — § 1503.3 requires positive drainage .
- Assuming flashing details can be “one size fits all” — the code defers specific flashing designs and product performance to manufacturers, AAMA standards, or approved design — verify with those documents as needed (§ 1503.2; see Related provisions) .
Worked example
Scenario: You have a commercial parapet wall that is 8 inches thick and the parapet is required to be fire‑resistance‑rated under § 705.12. You plan to install metal coping and metal flashing at the roof/parapet intersection.
Step 1 — Coping width and material:
- Provide coping or cover that is weatherproof and at least 8 inches wide (not less than the parapet thickness) so the coping width meets § 1503.3.1. Confirm the chosen coping material and installation do not reduce the wall’s required fire‑resistance rating (§ 1503.3.1; § 1503.3) .
Step 2 — Drainage:
- Shape or slope the parapet top/coping to provide positive drainage (e.g., slope away from the wall faces and toward scuppers or a roof drain) so water cannot pond on the parapet top (§ 1503.3) .
Step 3 — Flashing at roof‑wall intersection:
- Install corrosion‑resistant metal flashing at the parapet/roof intersection and other roof penetrations. If using metal flashing, select material ≥ 0.019 in. thick (No. 26 galvanized or equivalent) per § 1503.2.1 and dress the flashing to prevent water entry into joints and through copings (§ 1503.2; § 1503.2.1) .
Step 4 — Verify details:
- Make sure flashing is integrated with the coping and the roof covering so water is directed to the exterior and not behind the coping; follow manufacturer details or an approved design for laps, shingle sequencing and termination points per § 1503.2 and referenced installation guidance (§ 1503.2) .
Related provisions
- § 1503.2.1 — Locations and material minimum for flashing (metal thickness requirement)
- § 1503.3.2 — Parapet coping/cover requirements for parapets that meet exceptions in § 705.12 (see if your parapet qualifies)
- § 1404.4 — Flashing for exterior wall assemblies and fenestration; guidance on flashing to water‑resistive barriers and referenced standards (AAMA, etc.) — relevant to how flashing integrates with wall WRBs
- § 705.12 — Parapet fire‑resistance requirements referenced by § 1503.3.1 (determines which parapets must meet the fire‑rated coping rule)
Code references
Grounded in the retrieved California Building Code — click a citation to read the verbatim passage:
CBC § 1501.1 High relevance — show source text
ICC code development note: Code change proposals to sections preceded by the designation [BF] or [P] will be considered by one of the code development committees meeting during the 2024 (Group A) Code Development Cycle. All other code change proposals will be considered by a code development committee meeting during the 2025 (Group B) Code Development Cycle.
SECTION 1501—GENERAL
1501.1 Scope. The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies, and rooftop structures.
SECTION 1502—ROOF DRAINAGE
[P] 1502.1 General. Design and installation of roof drainage systems shall comply with this section, Section 1611 of this code and Chapter 11 of the California Plumbing Code .
[P] 1502.2 Secondary (emergency overflow) drains or scuppers. Where roof drains are required, secondary (emergency overflow) roof drains or scuppers shall be provided where the roof perimeter construction extends above the roof in such a manner that water will be entrapped if the primary drains allow buildup for any reason. The installation and sizing of secondary emergency overflow drains, leaders and conductors shall comply with Section 1611 of this code and Chapter 11 of the California Plumbing Code .
1502.3 Gutters. Gutters and leaders placed on the outside of buildings, other than Group R-3, private garages and buildings of Type V construction, shall be of noncombustible material or not less than Schedule 40 plastic pipe.
SECTION 1503—WEATHER PROTECTION
1503.1 General. Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter. Roof coverings shall be designed in accordance with this code, and installed in accordance with this code and the manufacturer’s approved instructions.
1503.2 Flashing. Flashing shall be installed in such a manner so as to prevent water from entering the wall and roof through joints in copings, through moisture-permeable materials and at intersections with parapet walls and other penetrations through the roof plane.
1503.2.1 Locations. Flashing shall be installed at wall and roof intersections, at gutters, wherever there is a change in roof slope or direction and around roof openings. Where flashing is of metal, the metal shall be corrosion resistant with a thickness of not less than 0.019 inch (0.483 mm) (No. 26 galvanized sheet).
1503.3 Parapet walls. Parapet walls shall be coped or covered in accordance with Sections 1503.3.1 and 1503.3.2. The top surface of the parapet wall shall provide positive drainage.
1503.3.1 Fire-resistance-rated parapet walls. Parapet walls required by Section 705.12 shall be coped or covered with weatherproof materials of a width not less than the thickness of the parapet wall such that the fire-resistance rating of the wall is not decreased.
1503.3.2 Other parapet walls. Parapet walls meeting one of the exceptions in Section 705.12 shall be coped or covered with weatherproof materials of a width not less than the thickness of the parapet wall.
1503.4 Attic and rafter ventilation. Intake and exhaust vents for ventilation of attic and enclosed rafter assemblies shall be provided in accordance with Section 1202.2 and the vent product manufacturer’s installation instructions.
CBC § 1503.2 High relevance — show source text
1503.2 Flashing. Flashing shall be installed in such a manner so as to prevent water from entering the wall and roof through joints in copings, through moisture-permeable materials and at intersections with parapet walls and other penetrations through the roof plane.
1503.2.1 Locations. Flashing shall be installed at wall and roof intersections, at gutters, wherever there is a change in roof slope or direction and around roof openings. Where flashing is of metal, the metal shall be corrosion resistant with a thickness of not less than 0.019 inch (0.483 mm) (No. 26 galvanized sheet).
1503.3 Parapet walls. Parapet walls shall be coped or covered in accordance with Sections 1503.3.1 and 1503.3.2. The top surface of the parapet wall shall provide positive drainage.
1503.3.1 Fire-resistance-rated parapet walls. Parapet walls required by Section 705.12 shall be coped or covered with weatherproof materials of a width not less than the thickness of the parapet wall such that the fire-resistance rating of the wall is not decreased.
1503.3.2 Other parapet walls. Parapet walls meeting one of the exceptions in Section 705.12 shall be coped or covered with weatherproof materials of a width not less than the thickness of the parapet wall.
1503.4 Attic and rafter ventilation. Intake and exhaust vents for ventilation of attic and enclosed rafter assemblies shall be provided in accordance with Section 1202.2 and the vent product manufacturer’s installation instructions.
Exception: Unvented attic and unvented enclosed rafter assemblies in accordance with Section 1202.3.
1503.5 Crickets and saddles. A cricket or saddle shall be installed on the ridge side of any chimney or penetration greater than 30 inches (762 mm) wide as measured perpendicular to the slope. Cricket or saddle coverings shall be sheet metal or of the same material as the roof covering.
Exception: Unit skylights installed in accordance with Section 2405.5 and flashed in accordance with the manufacturer’s instructions shall be permitted to be installed without a cricket or saddle.
SECTION 1504—PERFORMANCE REQUIREMENTS
1504.1 Wind resistance of roofs. Roof decks and roof coverings shall be designed in accordance with Section 1504.
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ROOF ASSEMBLIES AND ROOFTOP STRUCTURES
1504.2 Wind resistance of asphalt shingles. Asphalt shingles shall be tested in accordance with ASTM D7158. Asphalt shingles shall meet the classification requirements of Table 1504.2 for the appropriate maximum basic wind speed. Asphalt shingle packaging shall bear a label to indicate compliance with ASTM D7158 and the required classification in Table 1504.2.
Exception: Asphalt shingles not included in the scope of ASTM D7158 shall be tested and labeled in accordance with ASTM D3161. Asphalt shingle packaging shall bear a label to indicate compliance with ASTM D3161 and the required classification in Table 1504.2.
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 § 2.9 High relevance — show source text
Fire district D102.2.9 Height modifications 503.1.4, 504.3 Impact resistance 1504.7 Insulation 1508 Lightning protection systems 1511.7.6 Materials 1506 Mechanical equipment screen 1511.6 Parapet walls 1503.2, 1503.3 Penthouses 713.12.1, 1511.2 Photovoltaic panels and modules 1511.10, 1511.10.1 Radiant barrier 1510
Tanks 1511.3 Towers, spires, domes and cupolas 1511.5, 3108 Weather protection 1503 Wind resistance 1504.1, 1504.3, 1504.4, 1609.6 Roof Construction Construction walkways 3306.7 Coverings (see Roof Coverings) 1609.6.2 Draftstopping 718.4 Fire resistance Table 601 Fireblocking 718.2 Live loads 1607.14, Table 1607.1,
3111.1.2
Materials Chapter 6 Penetration of fire-resistant assemblies
714 Protection from adjacent construction 3307.1
Rain loads 1611
Roof deck 1609.6.1 Signs, roof mounted H110 Slope, minimum Chapter 15
Snow load 1608 Solar systems, rooftop-mounted 3111.1, 3111.3.2 Trusses 2206.1.3, 2303.4, 2308.11.12 Ventilation 1202.2
Wood (see Roof Construction, Wood) Roof Construction, Wood 602.4, 602.5 Anchorage to walls 1604.8.2 Attic access 1209.2 Ceiling joists 2308.11.1 Diaphragms 2305.1, 2306.2 Fastening requirements 2304.10 Fire-retardant-treated Table 601,
603.1
Framing 2304.11.4, 2308.11 Rafters 2306.1.1, 2308.11.2 Sheathing 2304.8.2, 2308.11.9 Trusses 2303.4, 2308.11.12 Ventilation, attic 1202.2 Wind uplift 2308.11.4 Roof Coverings 1507 Asphalt shingles 1507.2, 1609.2.1 Built up 1507.10 Clay tile 1507.3, 1513 Concrete tile 1507.3, 1513 Fire district D102.2.4
CBC § 712.1 High relevance — show source text
Exceptions 712.1, 1019, 1023 Exterior walls 713.6
Fire-resistance rating 707.3.1, 713.4 Group I-3 408.5 High-rise buildings 403.2.1.2, 403.2.3, 403.3.1.3, 403.5.1 Joints 713.9, 715 Materials 713.3
Opening protection 713.10, 713.8, 714, 717.5.3 Penetration 713.8
Plumbing fixtures Chapter 29 Risk category Table 1604.5 Special provisions 510.2, 510.5, 510.6 Separation 419, 420, 508.2.4, 508.3.3 Swimming pools 3109.1 Sprinkler protection 903.2.8, 903.3.2 Resistance Factor 1604 Retaining Walls 1807.2, 2304.12.2.8 Flood provisions G112.4 Seismic 1803.5.12 Reviewing Stands (see Bleachers and Grandstands) Risers, Stair (see Stairway Construction) Alternating tread devices 1011.14 Assembly 1011.5.2, 1030.10, 1030.14 Closed 1011.5.5.3
General 1011.5
Spiral 1011.10 Uniformity 1011.5.4 Risk Category (Structural Design) 1604.5 Multiple occupancies 1604.5.1 Rodentproofing 1201.1, 2304.3.1.1, 1, Appendix F Roll Roofing 1507.6 Roof, Occupiable (see Occupiable Roofs) Roof Access 1011.12 Roof Assemblies and Rooftop Structures 202 Cooling towers 1511.4 Drainage 1504, 3201.4 Fire classification 1505
Fire district D102.2.9 Height modifications 503.1.4, 504.3 Impact resistance 1504.7 Insulation 1508 Lightning protection systems 1511.7.6 Materials 1506 Mechanical equipment screen 1511.6 Parapet walls 1503.2, 1503.3 Penthouses 713.12.1, 1511.2 Photovoltaic panels and modules 1511.10, 1511.10.1 Radiant barrier 1510
Tanks 1511.3 Towers, spires, domes and cupolas 1511.5, 3108 Weather protection 1503 Wind resistance 1504.1, 1504.3, 1504.4, 1609.6 Roof Construction Construction walkways 3306.7 Coverings (see Roof Coverings) 1609.6.2 Draftstopping 718.4 Fire resistance Table 601 Fireblocking 718.2 Live loads 1607.14, Table 1607.1,
3111.1.2
Materials Chapter 6 Penetration of fire-resistant assemblies
714 Protection from adjacent construction 3307.1
Rain loads 1611
CBC § 1403.2 High relevance — show source text
** Flashing shall be installed in such a manner so as to prevent moisture from entering the exterior wall or to redirect that moisture to the surface of the exterior wall covering or to a water-resistive barrier complying with Section 1403.2 and that is part of a means of drainage complying with Section 1402.2. Flashing shall be installed at the perimeters of exterior door and window assemblies in accordance with Section 1404.4.1, penetrations and terminations of exterior wall assemblies, exterior wall intersections with roofs, chimneys, porches, decks, balconies and similar projections and at built-in gutters and similar locations where moisture could enter the wall. Flashing with projecting flanges shall be installed on both sides and the ends of copings, under sills and continuously above projecting trim. Where self-adhered membranes are used as flashings of fenestration in exterior wall assemblies, those self-adhered flashings shall comply with AAMA 711. Where fluid applied membranes are used as flashing for exterior wall openings, those fluid applied membrane flashings shall comply with AAMA 714. 1404.4.1 Fenestration flashing. Flashing of the fenestration to the wall assembly shall comply with the fenestration manufacturer’s instructions or, for conditions not addressed by the fenestration manufacturer’s instructions, shall comply with one of the following:
- The water-resistive barrier manufacturer’s flashing instructions.
- The flashing manufacturer’s flashing instructions.
- A flashing design or method of a registered design professional.
- Other approved methods. 1404.4.2 Exterior wall pockets. In exterior walls of buildings or structures, wall pockets or crevices in which moisture can accumulate shall be avoided or protected with caps or drips, or other approved means shall be provided to prevent water damage.
1404.4.3 Masonry. Flashing and weep holes in anchored veneer designed in accordance with Section 1404.7 shall be located not more than 10 inches (245 mm) above finished ground level above the foundation wall or slab. At other points of support including structural floors, shelf angles and lintels, flashing and weep holes shall be located in the first course of masonry above the support.
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EXTERIOR WALLS
[BS] 1404.5 Fastening. Exterior wall coverings shall be securely fastened with corrosion-resistant fasteners in accordance with this code or the approved manufacturer’s instructions. Fastening of claddings or furring through foam plastic insulating sheathing shall comply with Section 1404.5.1, 1404.5.2 or 1404.5.3, as applicable.
[BS] 1404.5.1 Cladding attachment over foam sheathing to masonry or concrete wall construction. Cladding shall be specified and installed in accordance with this chapter and the cladding manufacturer’s installation instructions or an approved design. Foam sheathing shall be attached to masonry or concrete construction in accordance with the insulation manufacturer’s installation instructions or an approved design. Furring and furring attachments through foam sheathing shall be designed to resist design loads determined in accordance with Chapter 16, including support of cladding weight as applicable. Fasteners used to attach cladding or furring through foam sheathing to masonry or concrete substrates shall be approved for application into masonry or concrete material and shall be installed in accordance with the fastener manufacturer’s installation instructions.
CBC § 301.3 High relevance — show source text
202, 301.3, 302.1, 302.3, 303.2.1, 304.2, 405.2.3.1, 501.2, 506.1, 506.1.1, 802.6, 804.2, 1001.2, 1011.5.1, 1303.1, 1303.1.1, 1304.1.2, 1304.1.3, 1402.7, 1501.6.7, 1509.1, A102.2, A107.1, A108.1, A113.7, A205.3.2, A301.1, A301.2, A301.3, A302.1, A303.1, A304.2.1, A304.2.2, A304.2.3, Table A304.2.3(1), A304.2.3(2), Table A304.2.3(2), A304.5, A403.8, A403.9.3.2, A404.1, A405.3, A405.3.2 Compartmentation 1305.2.3, Table 1305.2.3, 1305.2.20, Table 1305.2.20, Table
1306.1 Compliance Methods Chapter 3 Performance compliance method Chapter 13, 301.3.3 Prescriptive compliance method Chapter 5, 301.3.1 Work area compliance method Chapter 6, Chapter 7, Chapter 8, Chapter 9, Chapter 10, Chapter 11, 301.3.2
Conflict 102.1, 102.4.1, 102.4.2, 104.2.4.1, 113.1, 302.2, 1302.1.2 Construction Documents 104.3, 105.3, 105.3.1, 105.4, 106, 113.4, 202, 601.2, A105.4, A205.3, A301.1, A406, A407.1 Construction Safeguards 101.5, Chapter 15 Accessibility 1511 Adjoining property 1505 Automatic sprinklers 1510 Fire extinguishers 1507 Means of egress 1508 Owner’s responsibilities 1502 Protection of pedestrians 1504 Sanitary 1503 Standpipes 1509 Water supply 1512 Corridor
Dead-end 801.4, 804.8, 1011.5.1, 1305.2.12, 1305.2.12.1, Table 1306.1 Doors 804.7.1, 1011.5.1 Exit access 801.4, 802.2.1, 802.4, 802.4.1, 901.2, 1011.8.2 Openings 804.7, 804.7.1, 804.7.2, 804.7.3, 804.7.3.1, 804.7.4, 1011.5.1,
1011.8.2
CBC § 14-3 High relevance — show source text
1402 Performance Requirements . . . . . . . . . . . . . . . . . . . . 14-3
1403 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-4
1404 Installation of Wall Coverings. . . . . . . . . . . . . . . . . . . 14-5
1405 Combustible Materials on the Exterior Side of
Exterior Walls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-16
1406 Metal Composite Material (MCM). . . . . . . . . . . . . . . 14-17
1407 Exterior Insulation and Finish Systems (EIFS). . . . 14-18
1408 High-Pressure Decorative Exterior-Grade Compact Laminates (HPL). . . . . . . . . . . . . . . . . . . 14-18
1409 Insulated Metal Panel (IMP) . . . . . . . . . . . . . . . . . . . 14-19
1410 Plastic Composite Decking . . . . . . . . . . . . . . . . . . . . 14-21 1411 Building-Integrated Photovoltaic (BIPV) Systems for Exterior Wall Coverings and Fenestration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-21
1412 Soffits and Fascias at Roof Overhangs . . . . . . . . . . 14-21
1413 [DSA-SS & DSA-SS/CC, OSHPD 1, 1R, 2, 4 & 5] Additional Requirements for Anchored and Adhered Veneer. . . . . . . . . . . . . . 14-23
CHAPTER 15 ROOF ASSEMBLIES AND ROOFTOP
STRUCTURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1
1501 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3
1502 Roof Drainage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3
1503 Weather Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3
1504 Performance Requirements . . . . . . . . . . . . . . . . . . . . 15-3
1505 Fire Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-5
1506 Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-6
1507 Requirements for Roof Coverings . . . . . . . . . . . . . . . 15-7
CBC § 11-3 Medium relevance — show source text
1101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-3
1102 Heights and Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-3
1103 Structural. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4
1104 Energy Conservation. . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4
CHAPTER 12 HISTORIC BUILDINGS . . . . . . . . . . . . . . . . . .12-1
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CHAPTER 13 PERFORMANCE COMPLIANCE METHODS. . 13-3
1301 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-3
1302 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-3
1303 Acceptance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-4
1304 Investigation and Evaluation . . . . . . . . . . . . . . . . . . . 13-4
1305 Scoring and Evaluation . . . . . . . . . . . . . . . . . . . . . . . . 13-4
1306 Building Score . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14
1307 Evaluation of Building Safety. . . . . . . . . . . . . . . . . . 13-16
CHAPTER 14 RELOCATED OR MOVED BUILDINGS . . . . . . 14-3
1401 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-3
1402 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-3
CHAPTER 15 CONSTRUCTION SAFEGUARDS . . . . . . . . . . 15-3
1501 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3
1502 Owner’s Responsibility for Fire Protection . . . . . . . 15-3
1503 Sanitary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-4
CBC § 1.3 Medium relevance — show source text
1.3_
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4||X||†||||||||||||||||||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4||||||||||||||||||||X||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.CBC § 1501.1 Medium relevance — show source text
0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4|BSC|BSC-
CG|SFM|1|2|1-AC|AC|** SS**|SS/CC|1|1R|2|3|4|5|6|6|6|6|6|6|6|6|6| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.CBC § 2.3. Medium relevance — show source text
1 to 2.3._ Exception: The gap-to-side plate thickness ratio shall be permitted to be modified for moment connections with unequal beam sizes on opposite sides of the column or when orthogonal beams acting as drag connections frame into the side plate. 8. Demand critical fillet welds {2}, {5}, {5a} and {7} shall have Magnetic Particle Testing (MT) in accordance with AWS D1.1 for procedure, technique and acceptance. Inspect the beginning and end of these welds for a 6-inch length, plus any location along the length of the weld where a start and restart is visually noted for a distance of 6 inches on either side of the start/stop location.
2202.4.3 Modifications to AISC 358 Chapter 11 Bolted Moment Connection The bolted sideplate steel moment connection shall be permitted, provided: 1. The beams shall consist of either rolled or built-up wide flange sections. Columns shall consist of rolled or built-up wide flange sections or noncomposite built-up box or HSS with a minimum wall thickness of [3] / 4 inch (19 mm), or satisfy the requirements of width-to-thickness ratios of highly ductile members in AISC 341-16. 2. The biaxial dual-strong axis and column minor axis configurations of the moment connection shall be considered as an alternative system. 3. For SMF and IMF systems, on the sideplate standard or configuration A the U-shaped cover plates shall be used with the k dimension extension. The k dimension extension length is defined as beam depth d b /6, rounded to the nearest [1] / 2 inch (12.7 mm).
4. The hinge-to-hinge span to beam depth, L h /d, shall be greater than or equal to 4.5. 5. The width-to-thickness ratios for beam flanges shall not be less than 3.5. Exception: For width-to-thickness ratios less than 3.5 the C pr shall be calculated in accordance with that for welded side- plate connections but in no case shall the width-to-thickness ratio be less than 3.0. 6. The minimum bolt-to-bolt spacing shall not be less than 3 bolt diameters. 7. The extension of the side plates beyond the face of the column shall be within the range of 0.65d to 1.5d. 8. The gap-to-side plate thickness ratio shall range from 2.1 to 2.3.
Exception: The gap-to-side plate thickness ratio shall be permitted to be modified for moment connections with unequal beam sizes on opposite sides of the column or when orthogonal beams acting as drag connections frame into the side plate. 9. Demand Critical fillet welds {2}, {5}, {5a} and {8} shall have Magnetic Particle Testing (MT) in accordance with AWS D1.1 for procedure, technique and acceptance. Inspect the beginning and end of these welds for a 6-inch (152 mm) length, plus any location along the length of the weld where a start and restart is visually noted for a distance of 6 inches (152 mm) on either side of the start/stop location. 10. The connection specific factor to account for peak connection strength, C pr _, shall be between 1.15 and 1.35.
Frequently asked questions
Do I always use metal flashing?
Not always — the CBC requires corrosion‑resistant metal flashing to meet a minimum thickness when metal is used (§ 1503.2.1), but other approved flashing types (self‑adhered or fluid applied) are acceptable when they meet product standards and manufacturer instructions; integrate with the wall water‑resistive barrier as required (§ 1503.2) .
How wide must coping be on a fire‑rated parapet?
Not less than the thickness of the parapet wall; and the coping must be weatherproof and must not decrease the wall’s fire‑resistance rating (§ 1503.3.1) .
Is slope required on parapet tops?
Yes — § 1503.3 requires the top surface of the parapet wall to provide positive drainage so water is shed away from the wall and coping .
What minimum metal thickness should I specify for exposed flashings?
Metal flashing must be corrosion‑resistant and not less than 0.019 inch (0.483 mm), which is No. 26 galvanized sheet (§ 1503.2.1) .
If my flashing detail affects a fire rating, what must I do?
For parapets required to be fire‑resistance‑rated, coping/cover details must be designed and installed so they do not decrease the wall’s rating; coordinate with the design documents and the fire‑resistance requirements of § 705.12 and § 1503.3.1 .
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