408 



STRUCTURAL DRAFTING. 



CHAP. XII. 



of beam for anchors are best figured from wall end, not connecting them with other figures. The 

 distance between end holes in beams which connect through web or flange to columns, girders, etc., 

 shall always be given. When framing angles are standard, do not give any figures for either shop 

 or field rivets, except the distance from bottom of beam to center of connection or to first holes in 

 framing angle, and the horizontal distance between field holes. When special framing angles are 

 used, the fact must be noted and figures given for gages, etc. For standard connection holes in 

 web of beam all figures required are the distance from bottom of beam to centre of connection or 

 to first hole and the horizontal distance between holes. Whenever possible use standard punching. 



3 Separators for /8"W 



6 Hex dolts I *'*8' L Sl'l'L 



l6irder-5?I-3 rd fL 



cut 35 shown !*-- - 



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FIG. 17. STANDARD DETAILS FOR ROLLED BEAMS. 



ERECTION PLAN FOR MILL BUILDINGS. The preceding method for office buildings 

 will need considerable modification for steel frame mill buildings. The following method for 

 making erection plans lor steel frame mill buildings has been found very satisfactory. 



If the points of the compass are known, mark all pieces on the north side with the letter, N, 

 those on the south with the letter, S, etc. Mark girts N.G.i; N.G.2; etc. Mark all posts with a 

 different number, thus: N.P.i; N.P.2; etc. Mark small pieces which are alike with the same 

 mark; this would usually include everything except posts, trusses and girders, but in order to 

 follow the general marking scheme, where pieces are alike on both sides of a building, change the 

 general letter; e. g., N.G.7 would be a girt on the north side and S.G.7 the same girt on south side. 

 Then in case the north and south sides are alike, only an elevation of one side need be shown, and 

 under it a note thus: "Pieces on south side of building, in corresponding positions have the same 



