m 



A IN -tt. r IH ;1 M!./ for the end* of this girder could be 



by making it -Imrter in the direction of lengi 

 the girder and twing either a caat or built-up pedestal to 

 tmie the load in a transverse direction an in Jndfoaiod 

 in (/) and (g) of Fig. 1 h ..f 1. 



.-h..dd I :me (/) or (y) should 



be determined from tin- lawn of tl. \ur. . ami direct rtrm. 



u ii h . ;* to secure 



projx-r li>trihuti.n nf tin- load on the maMUiry and proper 

 :i|.|.li.-:iti..n of t: :<>n t,, th< -ir-l.-r, a bearing fhould 



bo used which by m< -aim of itu form and action will injure 

 this result. This is generally accomplushrd by means of 

 an upper and lt.\v.-r >ho,-, I Kith of which may fni-Iv rotaUs 

 about a pin. These upper and lower shoes should have 



Fio. 12A. 



proper bending strength and proper bearing on the pin 

 and masonry. These shoes may be either Imilt up of 

 rolled material or cast in one piece. Their detailed design 

 will not be undertaken here, as no new principle* a 

 be developed. 



PROBLEM 



12. Design an end bearing for a girder of a angle-track raOwajr 

 bridge of 96' effective length, the croarctk of the girder at the 



