\\l.l* I'l.ATEB II 



for a girder of ' racter an* very dinYrnit from il 



of the girder of problem tta. If -u.-h a girdi-r were 

 -trueted without -tinVn.-r-, ami formula . applied 



.ding tin- int. inty of ;;, thbt intermity would be 

 found to IN- v.-ry high. The heavy vi-rtiml -tifTrneni an? 

 added to transf i of they loa<U 



the_ou[ 



of the center of tin- \\, -h. an.l th.-rrl.N -ii-n- 



j*ity of vcrtK al stn-ss on hori/oiital plains ju-l at thi- inner 

 edgy f tin tlan^. aii^l->. ThoiM* xtifTrfu-r* rannot fully 

 accomplish tli.-ir oi,j.-,-t. a> thry an* of - nntrrial and 



:!i. \ at* -hnrtcncd by compreii8ion t and, a. they are 



..-.I to tii.- \\.-h. the web anil -tifTrn.-rs move tog* 



t for a variation .lu- to tin- Irfi.rriiatimi of tin* r 

 Th .stitTmrrs also servo to n-lu-vr tin* flangr rivi-t.* from 



thr r^inpoiu-nt lin- to tin- v.-rtiral lnal. 



iTi'iirrs Mipportinn rmn -lit rat. -.1 InaiU may l>r 



..hmm> with thr forniiila /'- 16,000 -70-, in which / 



shoull IM taken as on< -half the pnlt-r d.-pth ami r an the 

 railius of gyration aUmt an a\i- in the longitudinal center 

 line of the ^ini- 



YY ihined Htn*w intensity on a web plate 



exceed- the allowable unit stress the stresses may be 

 !\ means of side plates, as *hov .>tt<-d lines. 



Where the mnreiit rated loal .-tifTi-iura are at theVnd 

 of a girder they should have their outstanding lc*g about 

 equal to the horizontal the flange for the sake of 



good appear: .d where it b desin d to fare the mds 



of such girdrr- the >tifTening angles must be macle ti 



