Floor Load Width Diagram

The bearer span non loadbearing single or continuous is determined from the floor load width flw which for an external bearer will be half the joist span.

Floor load width diagram.

Tile roofs impart a heavier dead load on the bearers than sheet roofs. 1 psf lb f ft 2 47 88 n m 2. But a single span of 3800 with a flw of 2400 and joist spacings at 450 no roof loads you could get away with 1 x 240x45 f27 kiln dried hardwood. Refer to figure 3 4 4 1 table a of the building code of australia.

Dead load weight of structure and fixed loads 10 lbs ft 2. A room used solely for sleeping might need to carry only 30 psf whereas a garage floor over a basement would need 50 psf or higher. This is the fourth video in the series on the timber framing code. Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.

This results in the load diagram given in figure ta 2 14. Calculating beam loading assume that the floor system must support. Depending on the floor live load you will need 2 x 240x45. For an internal bearer which i assume you aren t after it is the half span load in both directions.

This video looks at floor load width flw. Where the bearer supports load bearing walls the type of roof covering also needs to be determined. Flw is used to calculate the sectional size of. Live load is weight of furniture wind snow and more.

1 ft 0 3048 m. These diagrams may also be used to determine roof load width for floor joists. First floor live loads have higher requirements than second floor live loads 40 pounds per square foot vs. 2 grade of douglas fir are indicated below.

To calculate your bearer size accurately flw needs to be taken into account as well as the live load of thr floor. This is referred to as the floor load width flw. 8th sep 2011 03 37 pm. Beam b 3 6 8 tributary width tributary area 18 ft 6 67 ft 120 ft2 tributary area beam span length x tributary width.

Maximum floor joist span for no. Area 0 5 sqrt l 1 2 l 2 2 w c. An inaccessible attic space on the other hand might have a live load of only 20 psf. Figure ta 2 14 load diagram for girder bc.

Determination of roof load width. Beam uniform load floor loading psf x tributary width ft beam b 3 6 8 tributary width.