Section R301 — DESIGN CRITERIA — 2025 California Residential Code (Title 24, Part 2.5)

R301.1 Application. ¶

R301.1 Application. Buildings and structures, and parts thereof, shall be constructed to safely support all loads, including dead loads, live loads, roof loads, flood loads, snow loads, wind loads and seismic loads as prescribed by this code. The construction of buildings and structures in accordance with the provisions of this code shall result in a system that provides a complete load path that meets the requirements for the transfer of loads from their point of origin through the load-resisting elements to the foundation. Buildings and structures constructed as prescribed by this code are…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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R301.2 Climatic and geographic design criteria. ¶

R301.2 Climatic and geographic design criteria. Buildings shall be constructed in accordance with the provisions of this code as limited by the provisions of this section. Additional criteria shall be established by the local jurisdiction and set forth in Table R301.2. TABLE R301.2—CLIMATIC AND GEOGRAPHIC DESIGN CRITERIACol2Col3Col4Col5Col6Col7Col8Col9Col10Col11Col12Col13 --------------------------------------- GROUND<brSNOW<brLOADo WIND DESIGN WIND DESIGN WIND DESIGN WIND DESIGN SEISMIC<brDESIGN<brCATEGORYf SUBJECT TO DAMAGE FROM SUBJECT TO DAMAGE FROM SUBJECT TO DAMAGE FROM ICE…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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R301.3 Story height. ¶

R301.3 Story height. The wind and seismic provisions of this code shall apply to buildings with story heights not exceeding the following: 1. For wood wall framing, the story height shall not exceed 11 feet 7 inches (3531 mm) and the laterally unsupported bearing wall stud height permitted by Table R602.3(5). Exception: A story height not exceeding 13 feet 7 inches (4140 mm) is permitted provided that the maximum wall stud clear height does not exceed 12 feet (3658 mm), the wall studs are in accordance with Exception 2 or 3 of Section R602.3.1 or an on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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R301.4 Dead load. ¶

R301.4 Dead load. The actual weights of materials and construction shall be used for determining dead load with consideration for the dead load of fixed service equipment.

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R301.5 Live load. ¶

R301.5 Live load. The minimum uniformly distributed live load shall be as provided in Table R301.5. TABLE R301.5—MINIMUM UNIFORMLY DISTRIBUTED LIVE LOADS (in pounds per square foot)Col2Col3 --------- USE UNIFORM LOAD (psf) CONCENTRATED LOAD (lb) Uninhabitable attics without storageb10— Uninhabitable attics with limited storageb, g20— Habitable attics and attics served with fixed stairs30— Balconies (exterior) and deckse60— Fire escapes40— Guards—200h, i Guard in-fill componentsf—50h Handraild—200h Passenger vehicle garages502,000a Areas other than sleeping areas40— Sleeping areas30—…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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R301.6 Roof load. ¶

R301.6 Roof load. The roof shall be designed for the live load indicated in Table R301.6 or the ground snow load indicated in Table R301.2, whichever is greater. TABLE R301.6—MINIMUM ROOF LIVE LOADS IN POUNDS-FORCE PER SQUARE FOOT OF HORIZONTAL PROJECTIONCol2Col3Col4 ------------ ROOF SLOPE TRIBUTARY LOADED AREA IN SQUARE FEET FOR ANY STRUCTURAL MEMBER TRIBUTARY LOADED AREA IN SQUARE FEET FOR ANY STRUCTURAL MEMBER TRIBUTARY LOADED AREA IN SQUARE FEET FOR ANY STRUCTURAL MEMBER ROOF SLOPE 0 to 200 201 to 600 Over 600 Flat or rise less than 4 inches per foot (1:3)201612 Rise 4 inches per foot…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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R301.7 Deflection. ¶

R301.7 Deflection. The allowable deflection of any structural member under the live load listed in Sections R301.5 and R301.6 or wind loads determined by Section R301.2.1 shall not exceed the values in Table R301.7. TABLE R301.7—ALLOWABLE DEFLECTION OF STRUCTURAL MEMBERSb, cCol2 ------ STRUCTURAL MEMBER ALLOWABLE DEFLECTION Rafters having slopes greater than 3:12 with finished ceiling not attached to raftersL/180 Interior walls and partitionsH/180 FloorsL/360 Ceilings with brittle finishes (including plaster and stucco)L/360 Ceilings with flexible finishes (including gypsum board)L/240 All…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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R301.8 Nominal sizes. ¶

R301.8 Nominal sizes. For the purposes of this code, dimensions of lumber specified shall be deemed to be nominal dimensions unless specifically designated as actual dimensions.

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