52 v . - - -\ N.\Ti: (SIIIDKR DESIGN 



should equal the net area of the lei; -plic.-d. Iii Lieneral 

 in splicing or connecting material undo tin- >pli<v 



OF connection should be arranged to avoid any redistri- 

 Imtion of stress. This requires that angles with unequal 

 legs be spliced by cover anglo with unr<|iial legs, and 



that the net area of each leg of the one In- e|lial to the 



net area of each leg of the other. 



The number of rivets in the splice <n each Bide of the 

 point where the angles are cut should he determined with 

 care. The duty of the rivets in developing the flange 

 -tress as well as in connecting the splin-d parts should 

 he clearly understood. For the purpose of illustration let 

 it he supposed that for the girder of Fig. 5 the only 

 material available for the flange angles is I angles oXGXj 

 Hi' \\" long and 4 angles 6x6Xi -28' A\" Ion-. This 

 makes it necessary to splice the bottom flanp- at a point 

 ('>' from the center of the girder. l 4 'i,L r . 10 .-hows the splice 

 in considerable detail. The net area of the two angles = 9.52 

 >j. ins., and this at 16,000 = 152,320 Ibs. as 1 he strength 

 which must be developed by both the rivets and air. 

 of the splice. Two 6X6X& angles with the le:s cut to 

 5i"each and the corner of the an^le planed so to lit the fillet 

 of the flange angles will be used for the splicing material. 



The -hear, at the point of splicing, simultaneous with 

 maximum flange stress, is 50,000 Ibs. The pitch of the 

 rivets cannot be less than o" in each line without reducing 

 the flange section (see Art. :*). 



The horizontal flange increment / per rivet from Formula 



^0 OOO 

 (5) <r-X3 = 2540 when none of the web i- aumed 



