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Appendix H — PATIO COVERS

Section AH106

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.

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.

TABLE AH106.4(1) DESIGN WIND PRESSURES FOR SCREEN ENCLOSURE FRAMING a, b, e, f, g, h

LOAD
CASE		 WALL ULTIMATE DESIGN WIND SPEED, V
ult
(mph)
LOAD
CASE		 WALL 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)
Ac Windward and leeward walls (flow thru) and
windward wall (nonflow thru)L/W = 0-1		 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		 7 8 9 11 12 14 16 19 21 24
Bd Windward: Nongable roof 9 10 11 13 15 18 21 23 26 30
Bd Windward: Gable roof 11 13 14 16 19 22 26 29 33 37
ROOF
Alle Roof-screen 2 3 3 3 4 4 5 6 7 7
Alle Roof-solid 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(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

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

n 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.

576 2019 CALIFORNIA RESIDENTIAL CODE

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

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) and AH106.4(2) for the ultimate design wind speed, Vult, determined from Figure AH106.4.1. Where any value is less than 10 pounds per square foot (psf) (0.479 kN/m 2 ) use 10 pounds per square foot (0.479 kN/m 2 ).

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.

PATIO COVERS

TABLE AH106.4(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.

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

PATIO COVERS

578 2019 CALIFORNIA RESIDENTIAL CODE

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

CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

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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
  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
    Overview
    1. Section AH101
    2. Section AH102
    3. Section AH103
    4. Section AH104
    5. Section AH105
    6. Section AH106
  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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