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Appendix AH — PATIO COVERS

Section AH106

California Residential Code (Title 24, Part 2.5) · 2022 edition · updated 2026-09-12 · California

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

SPECIAL PROVISIONS FOR ALUMINUM SCREEN

ENCLOSURES IN HURRICANE-PRONE REGIONS

AH106.1 General.

Screen enclosures in hurricane-prone regions shall be in accordance with the provisions of this section.

AH106.1.1 Habitable spaces. Screen enclosures shall not be considered habitable spaces.

AH106.1.2 Minimum ceiling height. Screen enclosures shall have a ceiling height of not less than 7 feet (2134 mm).

AH106.2 Definition.

The following word and term shall, for the purposes of this appendix, have the meaning shown herein.

SCREEN ENCLOSURE. A building or part thereof, in whole or in part self-supporting, and having walls of insect screening, and a roof of insect screening, plastic, aluminum or similar lightweight material.

AH106.3 Screen enclosures.

Screen enclosures shall comply with Sections AH106.3.1 and AH106.3.2.

AH106.3.1 Thickness. Actual wall thickness of extruded aluminum members shall be not less than 0.040 inch (1.02 mm).

AH106.3.2 Density. Screen density shall be not more than 20 threads per inch by 20 threads per inch mesh.

AH106.4 Design.

The structural design of screen enclosures shall comply with Sections AH106.4.1 through AH106.4.3.

AH106.4.1 Wind load. Structural members supporting screen enclosures shall be designed to support the minimum wind loads given in Tables AH106.4.1(1) and AH106.4.1(2) for the ultimate design wind speed, Vult, determined from Figure AH106.4.1. Where any value is

TABLE AH106.4.1(1) DESIGN WIND PRESSURES FOR SCREEN ENCLOSURE FRAMING a, b, e, f, g, h

LOAD
CASE		 WALL ULTIMATE DESIGN WIND SPEED, V (mph)
ult
LOAD
CASE		 WALL 90 95 100 105 110 120 130 140 150 160 170 180
LOAD
CASE		 WALL Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf) Exposure Category B Design Pressure (psf)
Ac Windward and leeward walls (flow thru) and windward wall
(nonflow thru)L/W = 0-1		 5 6 6 7 8 9 11 13 14 16 18 21
Ac Windward and leeward walls (flow thru) and windward wall
(nonflow thru)L/W = 2		 6 7 7 8 9 11 12 14 16 19 21 24
Bd Windward: Nongable roof 7 8 9 10 11 13 15 18 21 23 26 30
Bd Windward: Gable roof 10 10 11 13 14 16 19 22 26 29 33 37
ROOF
Alle Roof-screen 2 2 2 3 3 3 4 4 5 6 7 7
Alle Roof-solid 6 6 7 8 8 10 12 13 15 18 20 22

For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.44 m/s, 1 pound per square foot = 0.0479 kPa, 1 foot = 304.8 mm. a. Design pressure shall be not less than 10 psf in accordance with Section AH106.4.1. b. Loads are applicable to screen enclosures with a mean roof height of 30 feet or less in Exposure B. For screen enclosures of different heights or exposure, the

pressures given shall be adjusted by multiplying the table pressure by the adjustment factor given in Table AH106.4.1(2). c. For Load Case A flow-thru condition, the pressure given shall be applied simultaneously to both the upwind and downwind screen walls acting in the same

direction as the wind. The structure shall be analyzed for wind coming from the opposite direction. For the nonflow-thru condition, the screen enclosure wall shall be analyzed for the load applied acting toward the interior of the enclosure. d. For Load Case B, the table pressure multiplied by the projected frontal area of the screen enclosure is the total drag force, including drag on screen surfaces

ction as the wind. The structure shall be analyzed for wind coming from the opposite direction. For the nonflow-thru condition, the screen enclosure wall shall be analyzed for the load applied acting toward the interior of the enclosure. d. For Load Case B, the table pressure multiplied by the projected frontal area of the screen enclosure is the total drag force, including drag on screen surfaces

parallel to the wind, that must be transmitted to the ground. Use Load Case A for members directly supporting the screen surface perpendicular to the wind. Load Case B loads shall be applied only to structural members that carry wind loads from more than one surface. e. The roof structure shall be analyzed for the pressure given occurring both upward and downward. f. Table pressures are MWFRS loads. The design of solid roof panels and their attachments shall be based on component and cladding loads for enclosed or

partially enclosed structures as appropriate. g. Table pressures apply to 20-inch by 20-inch by 0.013-inch mesh screen. For 18-inch by 14-inch by 0.013-inch mesh screen, pressures on screen surfaces shall

be permitted to be multiplied by 0.88. For screen densities greater than 20 inches by 20 inches by 0.013 inch, pressures for enclosed buildings shall be used. h. Linear interpolation shall be permitted.

APPENDIX AH-2 2022 CALIFORNIA RESIDENTIAL CODE

Copyright © 2022 by, or licensed to, International Code Council, Inc. (ALL RIGHTS RESERVED); licensed to California Building Standards Commission pursuant to License Agreement. No further reproductions is authorized. 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.

APPENDIX AH—PATIO COVERS

less than 10 pounds per square foot (psf) (0.479 kN/m 2 ) use 10 pounds per square foot (0.479 kN/m 2 ).

TABLE AH106.4.1(2) ADJUSTMENT FACTOR FOR BUILDING HEIGHT AND EXPOSURE

MEAN ROOF
HEIGHT (feet)		 EXPOSURE
MEAN ROOF
HEIGHT (feet)		 B C D
15 1.00 1.21 1.47
20 1.00 1.29 1.55
25 1.00 1.35 1.61
30 1.00 1.40 1.66
35 1.05 1.45 1.70
40 1.09 1.49 1.74
45 1.12 1.53 1.78
50 1.16 1.56 1.81
55 1.19 1.59 1.84
60 1.22 1.62 1.87

For SI: 1 foot = 304.8 mm.

AH106.4.2 Deflection limit. For members supporting screen surfaces only, the total load deflection shall not exceed l /60. Screen surfaces shall be permitted to include not more than 25-percent solid flexible finishes.

AH106.4.3 Roof live load. The roof live load shall be not less than 10 psf (0.479 kN/m 2 ).

AH106.5 Footings.

In areas with a frost line depth of zero, screen enclosures supported on a concrete slab-on-grade without footings shall conform to the provisions of Section R506, be not less than 3 1 /2 inches (89 mm) thick and the columns shall not support loads in excess of 750 pounds (3.36 kN) per column.

Copyright © 2022 by, or licensed to, International Code Council, Inc. (ALL RIGHTS RESERVED); licensed to California Building Standards Commission pursuant to License Agreement. No further reproductions is authorized. 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.

APPENDIX AH—PATIO COVERS

APPENDIX AH-4 2022 CALIFORNIA RESIDENTIAL CODE

Copyright © 2022 by, or licensed to, International Code Council, Inc. (ALL RIGHTS RESERVED); licensed to California Building Standards Commission pursuant to License Agreement. No further reproductions is authorized. 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.

CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

APPENDIX AI – PRIVATE SEWAGE DISPOSAL

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user.

See Chapter 1 for state agency authority and building applications.)

APPENDIX AI

PRIVATE SEWAGE DISPOSAL

The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.

User note:

About this appendix: Appendix AI has one simple requirement that private sewage disposal systems must be in accordance with the International Private Sewage Disposal Code ® .

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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. Appendix AF — RADON CONTROL
  3. Appendix AI — PRIVATE SEWAGE
  4. Appendix AJ — EXISTING
  5. Appendix AK — SOUND
  6. Appendix AO — AUTOMATIC
  7. Appendix AR — LIGHT STRAW-CLAY
  8. Appendix AS — STRAWBALE
  9. Appendix AU — COB CONSTRUCTION
  10. Appendix AV — BOARD
  11. Appendix AW — 3D-PRINTED BUILDING
  12. Chapter 1 — SCOPE AND APPLICATION
  13. Chapter 3 — BUILDING PLANNING
  14. Chapter 4 — FOUNDATIONS
  15. Chapter 5 — FLOORS
  16. Chapter 6 — WALL CONSTRUCTION
  17. Chapter 7 — WALL COVERING
  18. Chapter 8 — ROOF-CEILING CONSTRUCTION
  19. Chapter 9 — ROOF ASSEMBLIES
  20. Chapter 10 — CHIMNEYS AND FIREPLACES
  21. Chapter 44 — REFERENCED STANDARDS
  22. ▸Appendix AH — PATIO COVERS
    Overview
    1. Section AH101
    2. Section AH102
    3. Section AH103
    4. Section AH104
    5. Section AH105
    6. Section AH106
    7. Section AI101
    8. Section AJ101
    9. Section AJ102
    10. Section AJ103
    11. Section AJ104
    12. Section AJ105
    13. Section AJ106
    14. Section AJ107
    15. Section AJ108
    16. Section AJ109
    17. Section AJ110
    18. Section AJ111
    19. Section AK101
    20. Section AK102
    21. Section AK103
    22. Section AK104
  23. Appendix AL — PERMIT FEES
  24. Appendix AQ — TINY HOUSES
  25. Appendix AT — SOLAR-READY PROVISIONS—DETACHED ONE- AND
  26. Appendix AX — SWIMMING POOL SAFETY ACT
  27. Appendix AY — AREAS PROTECTED BY THE FACILITIES
  28. Appendix AZ — EMERGENCY HOUSING

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