City of Oceanside Allowable Spans Building Division 300 N. Coast Hwy for Wood Joists and Rafters Oceanside, CA 92054

This information is provided as a service to our customers. The allowable spans for a given load and type of framing member are based on the California Building Code Chapter 25 for uniformly loaded, simply supported (i.e., supported at each end) members using Douglas Fir No. 2 (DF#2) grade lumber. Spans for different loading, support, or lumber grade must be determined in some other manner.

LOADS Live Load Dead Load Roofs: Material Weight (psf) Slope ≥4 in 12 = 16 lbs per sq. ft. (psf) Framing o.c. spacing Framing Member Slope < 4 in 12 = 20 psf 12” 16” 24” Ceilings: 10 psf 2x6 2.5 1.9 1.3 Residential Floors: 40 psf 2x8 3.4 2.5 1.7 Use of Tables 2x10 4.3 3.2 2.2 Identify the type of framing member under 2x12 5.2 3.9 2.6 consideration (floor joist, ceiling joist, rafter) and enter it into the far right column. 2x14 6.1 4.6 3.1 Estimate the size of the framing member in Asphalt/Comp. Shingles 2.2 order to arrive at the appropriate dead Concrete / Clay Tile 19.01 load. (This may need to be adjusted based on the actual size determined). Built-up roof (3 layer felt / gravel) 5.8

Based on the framing section of the Built-up roof – other (per manufacturer) proposed assembly, enter the dead load weights of each material in the assembly as Wood sheathing 3/8 inch 1.1 indicated in the table to the right. Tabulate ½ inch 1.5 the total dead load.

Enter the appropriate live load as noted 5/8 inch 1.8 above. ¾ inch 2.2

Choose a member size and spacing for the 1 1/8 in. 3.3 actual span from the column corresponding to the appropriate column for the type of Batt Insulation – in. x 0.1 = member and total load. Total load columns are in 5 psf increments. Use the column Rigid Insulation – in. x 1.5 = equal to or exceeding the derived total Drywall – ½ inch 3.3 load. Drywall – 5/8 inch 4.2 Span for this application is the clear distance (feet-inches) between supports. Vinyl flooring 1.0 For sloping joists, the span is measured along the horizontal projection. For gable Carpet and pad 1.5 roofs, the span is the clear distance Other between ridge member and support, measured along the horizontal projection. Other Duration of load, repetitive member and Other size factor adjustments have been incorporated into the size table and no Other additional adjustments are necessary or permitted. Dead Load Live Load Total Load

1 This number is used in the absence of manufacturer’s information. Use manufacturer’s number if available. City of Oceanside Allowable Spans Building Division 300 N. Coast Hwy for Wood Joists and Rafters Oceanside, CA 92054

This information is provided as a service to our customers. The allowable spans for a given load and type of framing member are based on California Building Code Chapter 25 for uniformly loaded, simply supported (i.e., supported at each end) members using Douglas Fir No. 2 (DF#2) grade lumber. Spans for different loading, support, or lumber grade must be determined in some other manner. See the directions for use of this table on the reverse side.

The following assumptions and criteria have been used – base fb: 900; fv: 180; E: 1,600,000; Deflection: floor joists: L/360; roof rafters and ceiling joists: L/240. Source: Western Wood Products Association Western Lumber Span Tables - 2001

FLOOR JOISTS Total Load 50 55 60 65 70 75 12 10-9 11-1 10-8 10-3 9-10 9-4 2X6 16 9-9 9-7 9-3 8-10 8-6 8-3 24 8-3 7-10 7-6 7-3 7-0 6-9 12 14-2 14-1 13-6 12-11 12-6 12-1 2X8 16 12-9 12-2 11-8 11-2 10-10 10-5 24 10-5 9-11 9-6 9-2 8-10 8-6 12 18-0 17-2 16-5 15-10 15-3 14-0 2x10 16 15-7 14-11 14-3 13-8 13-2 12-9 24 12-9 12-2 11-8 11-2 10-9 10-5 12 20-11 19-11 19-1 18-4 17-8 17-1 2x12 16 18-1 17-3 16-6 15-10 15-4 14-9 24 14-9 14-1 13-6 13-0 12-6 12-1 12 22-9 22-0 21-3 20-3 19-9 19-1 2x14 16 20-1 19-6 18-11 18-3 17-1 16-6 24 15-8 15-3 14-9 14-4 13-11 13-6 RAFTERS / CEILING JOISTS / COMBINATION RAFTER/JOISTS Total Load 15 20 25 30 35 40 45 50 12 12-5 10-10 9-10 9-10 9-10 9-10 8-7 8-7 2x4 16 11-3 9-10 8-11 8-11 8-11 8-7 7-10 7-9 24 9-10 8-7 7-10 7-10 7-6 7-0 6-8 6-4 12 19-6 17-0 15-6 15-6 15-6 14-7 13-9 13-0 2X6 16 17-8 15-6 14-1 14-1 13-6 12-7 11-11 11-3 24 15-0 13-0 12-3 11-11 11-0 10-4 9-8 9-3 12 25-8 22-5 20-5 20-5 20-9 18-5 17-5 16-6 2X8 16 23-4 20-2 18-6 18-5 17-1 16-0 15-1 14-3 24 19-1 16-6 16-2 15-1 13-11 13-0 12-4 11-8 12 32-9 28-6 26-0 26-0 24-1 22-6 21-3 20-2 2x10 16 28-6 24-8 23-8 22-6 20-10 19-6 18-5 17-5 24 23-3 20-2 20-2 18-5 17-0 15-11 15-0 14-3 12 35-9 33-0 31-8 30-2 27-11 26-1 24-8 23-4 2x12 16 30-0 29-6 28-7 26-1 24-2 22-7 21-4 20-3 24 24-9 24-0 23-4 21-4 19-9 18-6 17-5 16-6