16 



\oTKS OX PLATE-GIRDEfi DESIGN 



Another .Dimple formula by the author for finding the 

 lengths of cover plates I'm- this class of loading is given 

 in Eng. News, XXXII. page 278, the issue of Oct. 4, 1894. 



The second: For girders carrying loadings which may 

 not be rcprex-nted by a uniform load. Girders of this 

 their loads through other girders or columns 

 at definite points. The main girders of through plate 

 Birder spans with floorbeams are common examples of 

 this class. 



As before the resisting moment =*Sha, where 



a area of flange at end of any cover; 



A-= depth c. to c. of gravity of flanges at end of any 



cover; 

 -11 nit stress. 



The bending moment AT at any point along the length 

 of the beam and distant x from the left end, where PI, 

 P 2 , PS, etc., of Fig. 46 are the concentrated loads, w the 



R /- 



2 



> , i" I" 



FIG. 46. 



uniform load per foot of length, and RI the left hand reac 

 tion, is given from 



M 



-MX--;} -Pi(x -0) -P 2 (x -b) - etc. 



