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Chapter 3 — BUILDING PLANNING

Section R337.8

California Residential Code (Title 24, Part 2.5) · 2019 edition · updated 2026-09-12 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

EXTERIOR WINDOWS, SKYLIGHTS AND DOORS

R337.8.1 General.

R337.8.2 Exterior glazing. The following exterior glazing materials and/or assemblies shall comply with this sec- tion:

1. Exterior windows.

2. Exterior glazed doors.

3. Glazed openings within exterior doors.

4. Glazed openings within exterior garage doors.

5. Exterior structural glass veneer.

6. Skylights.

7. Vents.

R337.8.2.1 Exterior windows, skylights and exterior glazed door assembly requirements. Exterior windows, skylights and exterior glazed door assemblies shall comply with one of the following requirements:

1. Be constructed of multipane glazing with a mini- mum of one tempered pane meeting the require- ments of Section R308 Safety Glazing, or

2. Be constructed of glass block units, or

3. Have a fire-resistance rating of not less than 20 minutes when tested according to NFPA 257, or

BUILDING PLANNING

4. Be tested to meet the performance requirements of SFM Standard 12-7A-2.

R337.8.2.2 Operable skylights. Operable skylights shall be protected by a noncombustible mesh screen where the dimensions of the openings in the screen shall not exceed 1 /8 inch (3.2 mm).

R337.8.2.3 Structural glass veneer. The wall assembly behind structural glass veneer shall comply with Sec- tion R337.7.3 Exterior walls.

R337.8.3 Exterior doors. Exterior doors shall comply with one of the following:

1. The exterior surface or cladding shall be of noncom- bustible material, or

2. The exterior surface or cladding shall be of ignition- resistant material, or

3. The exterior door shall be constructed of solid core wood that complies with the following requirements:

3.1. Stiles and rails shall not be less than 1 3 /8 inches thick

3.2. Panels shall not be less than 1 1 /4 inches thick, except for the exterior perimeter of the panel that shall be permitted to taper to a tongue not less than 3 /8 inch thick.

4. The exterior door assembly shall have a fire-resis- tance rating of not less than 20 minutes when tested according to NFPA 252.

5. The exterior surface or cladding shall be tested to meet the performance requirements of Section R337.7.3.1 when tested in accordance with ASTM E2707.

6. The exterior surface or cladding shall be tested to meet the performance requirements of SFM Stan- dard 12-7A-1.

R337.8.3.1 Exterior door glazing. Glazing in exterior doors shall comply with Section R337.8.2.1.

R337.8.4 Garage door perimeter gap. Exterior garage doors shall resist the intrusion of embers from entering by preventing gaps between doors and door openings, at the bottom, sides and tops of doors, from exceeding 1 /8 inch (3.2 mm). Gaps between doors and door openings shall be controlled by one of the following methods:

1. Weather stripping products made of materials that: (a) have been tested for tensile strength in accor- dance with ASTM D638 (Standard Test Method for Tensile Properties of Plastics) after exposure to ASTM G155 (Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non- Metallic Materials) for a period of 2,000 hours, where the maximum allowable difference in tensile strength values between exposed and nonexposed samples does not exceed 10 percent and (b) exhibit a V-2 or better flammability rating when tested to UL 94, Standard for Tests for Flammability of Plas- tic Materials for Parts in Devices and Appliances.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

BUILDING PLANNING

2. Door overlaps onto jambs and headers.

3. Garage door jambs and headers covered with metal flashing.

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▸Contents — California Residential Code (Title 24, Part 2.5)
California Residential Code (Title 24, Part 2.5)
  1. Chapter 2 — DEFINITIONS AND ABBREVIATIONS
  2. Chapter 1 — SCOPE AND APPLICATION
  3. ▸Chapter 3 — BUILDING PLANNING
    Overview
    1. Section R300
    2. Section R301
    3. Section R302
    4. Section R303
    5. Section R304
    6. Section R305
    7. Section R306
    8. Section R307
    9. Section R308
    10. Section R309
    11. Section R310
    12. Section R311
    13. Section R312
    14. Section R313
    15. Section R314
    16. Section R315
    17. Section R316
    18. Section R317
    19. Section R318
    20. Section R319
    21. Section R320
    22. Section R321
    23. Section R322
    24. Section R323
    25. Section 324
    26. Section R325
    27. Section R334
    28. Section R335
    29. Section R326
    30. Section R327
    31. Section R336
    32. Section R337
    33. Section R337.1
    34. Section R337.2
    35. Section R337.3
    36. Section R337.4
    37. Section R337.5
    38. Section R337.6
    39. Section R337.7
    40. Section R337.8
    41. Section R337.9
    42. Section R337.10
    43. Section R340
    44. Section R338
  4. Chapter 4 — FOUNDATIONS
  5. Chapter 5 — FLOORS
  6. Chapter 6 — WALL CONSTRUCTION
  7. Chapter 7 — WALL COVERING
  8. Chapter 8 — ROOF-CEILING CONSTRUCTION
  9. Chapter 9 — ROOF ASSEMBLIES
  10. Chapter 10 — CHIMNEYS AND FIREPLACES
  11. Chapter 44 — REFERENCED STANDARDS
  12. Appendix F — RADON CONTROL METHODS
  13. Appendix H — PATIO COVERS
  14. Appendix I — PRIVATE SEWAGE DISPOSAL
  15. Appendix J — EXISTING BUILDINGS AND STRUCTURES
  16. Appendix K — SOUND TRANSMISSION
  17. Appendix L — PERMIT FEES
  18. Appendix O — AUTOMATIC VEHICULAR GATES
  19. Appendix Q — TINY HOUSES
  20. Appendix R — LIGHT STRAW-CLAY CONSTRUCTION
  21. Appendix S — STRAWBALE CONSTRUCTION
  22. Appendix T — SOLAR-READY PROVISIONS—DETACHED ONE- AND
  23. Appendix V — SWIMMING POOL SAFETY ACT
  24. Appendix W — AREAS PROTECTED BY THE FACILITIES
  25. Appendix X — EMERGENCY HOUSING

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