50 STANDARD SPECIFICATIONS 



203. Straightening Material. Material shall be thoroughly 

 -straightened in the shop by methods that will not injure it, before 

 being laid off or worked in any way. 



The several pieces forming one built member shall be straight 

 and fit closely together, and finished members shall be free from 

 twists, bends or open joints. 



204. Lattice Bars. Lattice bars shall have neatly rounded 

 ends, unless otherwise called for. 



205. Finish. Shearing and chipping shall be neatly and 

 Accurately done and all portions of the work exposed to view 

 neatly finished with sharp cutting tools, a chisel, or a file. 



206. Edge Planing. In all material over |- in. thick the sheared 

 ^dges or ends shall be planed at least J- in. 



207. Finish of Joints. Abutting joints shall be cut or dressed 

 true and straight and fitted close together, especially where open 

 to view. In compression joints, depending on contact bearing, 

 the surfaces shall be truly faced, so as to have even bearings 

 after they are riveted up complete and when perfectly aligned. 



208. Field Connections. Holes for floor beam and stringer 

 connections shall be sub-punched and reamed according to Par. 

 212 to a steel templet one inch thick. 



All other field connections, except those for laterals and sway 

 bracing, shall be assembled in the shop and the unfair holes 

 reamed; and when so reamed the pieces shall be match-marked 

 before being taken apart. 



209. Connection Angles. Connection angles for floor beams, 

 stringers, and plate girders shall be flush with each other and 

 correct as to position and length of girder. 



When not correct after being riveted up milling will be required 

 And the removal of more than ^ in. from their thickness will be 

 cause for rejection. 



210. Rivet Holes. When reaming is not required the diameter 

 of the punch, shall not be more than fj in. greater than the 

 diameter of the rivet; nor the diameter of the die more than 

 J in. greater than the diameter of the punch. (Pars. 212 

 And 214.) 



211. Punching. All punching shall be accurately done. Drift- 

 ing to enlarge unfair holes will not be allowed. If the holes must 

 be enlarged to admit the rivet, they shall be reamed. Poor 

 matching of holes will be cause "for rejection. (Par. 212.) 



