6J 



NOTES ON n.\Ti:-(,ii;ni:i; DKSICN 



The en. 1 stilYeiiers for tliis case should l>e .">x3J angles 

 and their radius of gyration in a direction transverse to 

 thr web i- 2.78" approximately. Tin- required area for 



lltMO 



1 1 1 1 n i rrrt 



(d) 



I ... 1-J. 



>iinVnore 



12.7 sq.in. [P - 16,000 - 



1 '.,000-750 = 15250]. 



Then-fore -1 angles 5 X3J Xl2(ft) = 14.11 sq.in. will he 

 ample. 



The addition of another pair of stififeners over the 

 center of the bearings would help greatly in distributing 

 the pressure over the wall plates, as their outstanding 



FIG. 12. 



legs would prevent an upward deflection of the plates 

 and angles between the pair.^ of stiffeners. The additional 

 stiffeners are shown by dotted lines in Fig. 12 (a) and (6). 



