582 THE DESIGN OF STEEL DETAILS. CHAP. XVII. 



(3) By moment of inertia of net section (see 42, p. 58; 50, p. 142; 29, p. 206), 



M = (i") 



c 



(4) By moment of inertia of gross section (used by American Bridge Co. for plate girders 

 for buildings), 



M =*-- (i" ; ) 



c 



Rivets in Flanges Which do not Carry Concentrated Loads. 

 (i) Assuming that all bending moment is carried by flanges, 



Tr3 



mm 



Jjlllll 



lljlili 



HeutralAxh 



FIG. 8. WEB SPLICE FOR PLATE GIRDER. FIG. 9. WEB SPLICE FOR PLATE GIRDER. 



P-'- (2) 



(2) Assuming that one-eighth the gross area of web is available as flange area, 



Ai> + \A W * r-h' 



P = 

 (3) By moment of inertia of net section, 



AF' X V 



p= l 

 (4) By moment of inertia of gross section, 



2r-I' 



V-AF-h 



Rivets in Flanges Carrying Concentrated Loads. 



(i) Assuming that all the bending moment is carried by the flanges, 



P = 



(2) Assuming that one-eighth the gross area of the web is available as flange area, 



r 



P = 



(3) By moment of inertia of net section, 



P = 



(3) 

 (4) 

 (5) 



(6) 



(7) 

 (8) 



