NOTES ON PLATE-GIRDEB DESIGN 



A, horizontal increment of stre in a length of 



one inch carried hy ai\ 

 t> r Vertical load per inch of length of Hang. 



by the conc.-n! rated load 



r r resultant of h r and v r , Vh? r + t^r 



M'\- 



Then if R= the value of tin- rivet, :i> 



R 



this he aj)plicl t( finding the pitch for connecting 

 the top flange angles to tin \veb for the end of the girder 

 of Fig. 5a. 



Va^ 193.500 X9.52 193,500 X9.52 

 ^a a " 57.24X12.33 = 70577 



JF_50,000 



__ 7876 7870 



P o**iri tvl. 



For the heavier concentrated loads, such as columns 

 bring when carried on the flanges of the girders, the flange 

 angles will often not contain enough rivets for security, 

 and stiffeners must he used, as will lx> explained later. 

 The foregoing gives a simple method for finding the max- 

 imum permissiMe pitch of the rivets connecting the vertical 

 legs of the flange angles to the web. 



The determination of the pitch of the rivets for con- 



