430 ESTIMATES OF STRUCTURAL STEEL. CHAP. XIII. 



Mr. Gage makes the following comments on the cost of drafting: "The cost of drafting 

 materials and blue prints was not included. There is always a noticeable decrease in cost of 

 the details when the plans for the ironwork are made and designed by an engineer and separated 

 from the general work. On the average it cost 35 per cent more to make shop drawings of the 

 structural steel when the data were taken from the architect's plans than when the data were 

 taken from carefully worked out engineer's plans. Inaccurate plans where the draftsman is 

 continually finding errors which must be referred to the architect materially increase the cost of 

 shop drawings." 



(6) COST OF MILL DETAILS. If material is ordered directly from the rolling mill the 

 price for the necessary cutting to exact length, punching, etc., is based on a standard "card of 

 mill extras." 



CARD OF MILL EXTRAS. If the estimate is to be based on card rates it will be necessary 

 to have the subdivisions a, b, c, d, e, f, r, etc., as follows: 



a = o.i $cts. per Ib. This covers plain punching one size of hole in web only. Plain punching, 

 one size of hole in one or both flanges. 



b = o.2^cts. per Ib. This covers plain punching one size of hole either in web and one flange 

 or web and both flanges. (The holes in the web and flanges must be of same size.) 



c = o.^octs. per Ib. This covers punching of two sizes of holes in web only. Punching of 

 two sizes of holes either in one or both flanges. One size of hole in one flange and another size 

 of hole in the other flange. 



d = o.$5cts. per Ib. This covers coping, ordinary beveling, riveting or bolting of connection 

 angles and assembling into girders, when the beams forming such girders are held together by 

 separators only. 



e = o.^octs. per Ib. This covers punching of one size of hole in the web and another size of 

 hole in the flanges. 



/ = o.i^cts. per Ib. This covers cutting to length with less vibration than + f in. 



r = o.$octs. per Ib. This covers beams with cover plates, shelf angles, and ordinary riveted 

 beam work. If this work consists of bending or any unusual work, the beams should not be 

 included in beam classification. 



Fittings. All fittings, whether loose or attached, such as angle connections, bolts, separators, 

 tie rods, etc., whenever they are estimated in connection with beams or channels to be charged 

 at i.55cts. per Ib. over and above the base price. The extra charge for painting is to be added 

 to the price for fittings also. The base price at which fittings are figured is not the base price of 

 the beams to which they are attached but is in all cases the base price of beams 15 in. and under. 



The above rates will not include painting, or oiling, which should be charged at the rate of 

 o.iocts. per Ib. for one coat, over and above the base price plus the extra specified above. 



For plain punched beams where more than two sizes of holes are used, o.iscts. per Ib. should 

 be added for each additional size of hole, for example, plain punched beams, where three sizes of 

 holes occur would be indicated as: c + o.iscts., four sizes of holes; e + o.iocts. For example: 

 a beam with f in. and f in. holes in the flanges and f in. and f in. holes in the web should be 

 included in class e. 



Cutting to length can be combined with any of the other rates, class d excepted, and would 

 have to be indicated; for example: Plain punching one size of hole in either web and one flange, 

 or web and both flanges, and cutting to length would be marked bf, which would establish a total 

 charge of o.4octs. per Ib. 



Note to class d. No extra charge can be added to this class for punching various sizes of 

 holes, or cutting to exact lengths; in other words; if a beam is coped or has connection angles 

 riveted or bolted to it, it makes no difference how many sizes of holes are punched in this beam, 

 the extra will always be the same, namely o.35cts. When beams have angles or plates riveted to 

 them, and same are not half length of the beam, figure the beams as class d, and the plates and 

 angles as beam connections. 



Note to class r. This rate of o.socts. per Ib. applies to all the material making up the riveted 

 beam. In case of assembled girders in which one of the beams should be classed as a riveted 

 beam, in making up the estimate, figure only the beam affected as included in class "r." When 

 beams have angles or plates riveted to them and same are half length or more than half length 

 of the beam, figure the beams as class "r," including the plates or angles and rivets. When 

 1 8 in., 20 in., or 24 in. beams are in "r" class keep the I's separate from the material (plates, 

 cast iron, separators, angles and nvets) which should go under heading, "15 in. I's and Under." 



Beams should be divided as 15 in. I's and under, and 18 in., 20 in. and 24 in. I's. If there 

 are only one or two sizes of beams in any particular class, give exact sizes, instead of "15 in. I's 

 and Under." 



