p-ir- H _ 



-For use with 



Maximum Sfress in Steel = 16,000 Ibs. per sq . inch. 

 Maximum Stress in Concrete=30Olbs.per sq. inch . 



Maximum Bending Moment ~ 

 where 



w = +ofal load per sa. -ft. 

 l.= cenier lo center span. 



rz wT. 2 . 



.3 -A3 -O7~5 



Area = ^7. 07S 3<g. 



f% of w/t///>. 



ff-o' 



9-0- 



<? 



36 



23S 



. 



72 



2 



#7 







42 



3Z3 



67 



S3 



372 



20 



7? 



srs 



7 



33 



/2o 



467 



2/7 



76 



682 



393 



30 6 



S87 



