TIMBER STRINGERS. 



TABLE VII. 



SPACING OF TIMBER STRINGERS OR JOISTS. 

 Calculated for 15-ton Auto Truck, Without Impact. 



113 



TABLE VIII. 



SPACING OF TIMBER STRINGERS OR JOISTS. 

 Calculated for lo-ton Auto Truck, Without Impact. 



Steel I-Beam Floorbeams. The sizes of steel I-beams required for floorbeams for panel 

 lengths of 10 ft. to 24 ft. and widths center to center of trusses or girders of 15 ft. to 26 ft. to carry 

 a dead load of 100 Ib. per sq. ft., and a 2o-ton auto truck with 30 per cent impact, or a uniform live 

 load of 125 Ib. per sq. ft. with 30 per cent impact are given in Fig. 9; while the floorbeams required 

 to carry a 15-ton auto truck with 30 per cent impact, or a uniform live load of 100 Ib. per sq. ft. 

 with 30 per cent impact are given in Fig. 10. It will be noted that the uniform live load controls 

 for wide roadways or for long panels. 



9 



