u 



NOTKS 



DKSKiX 



PROBLEMS 



l'i. The accompanying sketch hm\s ih, .T<>SS-S< -tion of the girder 

 of Prob. 6a and the cun'e of unit six ;u distribution. Construct the. 



FIG. 7c. 



figure to three times the size of the sketch shown and write in tin v.- 

 of the ordinates to the curve at points \" apart from the t<>|> t(. the 

 bottom of the section. 



76. Are stiffenere required on the web of the girder of Prob. 6a? 

 If not, show it by computation. 



7c. What is the minimum thickness permissible for the web of the 

 girder in Prob. 6a? 



ART. 8. STIFFENERS FOR WEB PLATES 



Stiffcners have several important functions, the chief of 

 which are: 



(a) They keep the web from buckling, due to the com- 



1'icssive stresses in it. 



(6) They help hold the compivssinn flange from lat-ral 

 failure as a whole and from failun in detail in 

 any direction, 

 (c) They are used to relieve the rivets connecting the 



