General Information
Carports shall be open on not less than two sides. Carport floor surfaces shall be of approved noncombustible material. The area of floor used for parking vehicles shall be slope to facilitate the movement of liquids to a drain or toward the main vehicle entry doorway. (CRC R309.2) Exception: Asphalt surfaces shall be permitted at ground level.
Structural Analysis by a licensed design professional is required for non-conventional construction, especially for lateral design since carports typically have very limited shear walls due to the open nature of the structure.
Common Features Requiring Structural Calculations & Plans
- Load-bearing beams, including glu-lams
- Large or high strength timber connections
- Non-standard foundations, including pier and grade beams
- Trusses -when they are site built or not manufactured by an approved truss company
- Construction other than conventional, wood framing, per CBC or CRC
- A structure with one or more plan or vertical irregularities, as defined in ASCE
If structural plans and calculations are required, they must be stamped and signed by a design professional licensed in California. You'll need to hire one of the following California licensed professionals:
- Licensed Architect
- Civil Engineer (P.E.)
- Structural Engineer (S.E.)
Conventional Wood-Framed Construction (maximum two-story structures only)
Simple two-story structures that meet certain criteria for conventional construction prescribed in the CA Building Code or the CA Residential Code do not require structural engineering.
Wildland Urban Interface (WUI):
If a carport is in the Wildland Urban Interface (WUI) area, CRC Chapter 337 or CBC Chapter 7A apply. Per County Code 12.10.220(H) and 12.10.215(D), accessory structures such as carports are not exempt.
- The underside of the roof covering is subject to the same requirements for covered porches.
- Posts need to be heavy timber, wrapped in a WUI-compliant material, or be fire resistant-treated lumber.
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