328 PORTAL WITH POSTS FIXED AT ENDS. Art. 165 



Eq . (jig) B- 



(e a)( 



.......... (129) 



Recapitulation : 



Find x from equation (118) and z/ from a similar equation 

 in a' and c'. Find H and 5' from equations (103) and (102). 

 Find R! from (128) and JB/ from a similar equation in IP, a', 

 and c'. Find V and T 7/ from equations (124), (125) or (126). 



Now all the stresses may be found. 



At B Stress in BB'=R 2 PRi=R+%P+H ^- - ( 13 ) 



C 



At 5' Horiz. Comp. B'F= 



c a 

 At F, Using equations (129) and (102) 



Horiz. Comp. B'F= 



c a c a c a 



=11' + f #' 



c 



-H. . ( 133) 



The maximum stress in a'B' occurs at F' or a' and equals 

 -per. sq. in. 



DL+LL+V H f (a'x',)X width of a' B 1 (135) 



A 27' 



DL+LL+ V H'x'^vidth of o! B' 



~AT '+- -2T~ 



whichever is the larger. 



The maximum stress in aB occurs at F or a and equals per 

 sq. in. 



DL+LL V Hjax^X width of aB .^. 



A. 21 



DL-\-LLV Hx { Xwidth of aB ,^^ 



whichever is the larger. 



A gross area of cross section. 



Z>L=stress from Dead Load. LL=stress from Live Load 



