WEIGHT OF ELECTRIC CRANES 19 



Pawling and Harnischfeger is given in Fig. 7. Cranes made by different 

 manufacturers differ considerably in weight. 



The weights and dimensions of typical traveling cranes as given 

 in Table Ilia have been proposed for adoption as a standard. 



TABLE Ilia. 

 TYPICAL ELECTRIC TRAVELING CRANES.* 



1. Wheel-load can be assumed as distributed in top flange, over a 

 distance equal to depth of girder, with a maximum limit of 30 in. 



2. In addition to the vertical load, the top flanges of the girder 

 shall withstand a lateral loading of two-tenths of the lifting capacity 

 of the crane, equally divided between the four wheels of the crane. 



s=Side clearance from center of rail. 

 v= Vertical clearance from top of rail. 



3. The top flanges of the crane girders shall not be of smaller 

 width than one-twentieth of their unsupported length. 



WEIGHTS OF MISCELLANEOUS MATERIAL. The 



weights of various kinds of merchandise are given in Table IV. For 

 weights of other materials consult steel makers hand books. 



* Mr. C. C Schneider in Trans. Am. Soc. C. E., Vol. 54, 1905. 



