18 



Annealing 



Castings 



Welds 



Weight 

 Paid For 



Variation 

 in Weight 



Computed 

 Weight 



Marking 

 and Shipping 



Shipping 

 Invoices 



Inspectors 



173. Shoe plates of plate girders shall have full contact with the girder flanges. 

 Shoe and bed plates shall be planed or hot-straightened. Cast bed plates shall be planed 

 on the surfaces in contact with steel, and shall have the bottom surfaces resting on 

 masonry rough finished. 



174. Excepting minor details, steel which has been partially heated shall be properly 

 annealed. 



175. Castings shall be free from large or injurious blow-holes; and steel castings 

 shall be annealed. 



176. Welds in steel will not be allowed. 



WEIGHING AND SHIPPING 



177. The payment for pound price contracts shall be based upon the scale weight 

 of the metal in the fabricated structure, (including field rivets) shipped. The weight of 

 the field paint, cement and erection bolts, boxes and barrels used for packing, and materi- 

 al used for staying or supporting members on cars, shall be excluded. 



178A. If the weight of any member is more than 2^ pet* cent, under the computed 

 weight, it shall be cause for rejection. The greatest allowable variation of the total 

 scale weight of any structure from the weights computed from the approved shop draw- 

 ings shall be 2 per cent. The Railway Company will not pay for any weight in excess 

 of 2 per cent, above the computed weight, and when actual scale weights are not ob- 

 tained the computed weights with no percentage allowance shall be used for making 

 payments. 



179. The computed weights of rolled shapes, and of plates up to and including 36 

 inches in width, shall be calculated on the basis of their dimensions as shown on the 

 approved shop drawings, deducting for copes, cuts and open holes. 



180. The computed weights of plates wider than 36 inches shall be calculated on 

 the basis of their dimensions as shown on the approved shop drawings, deducting for cuts 

 and open holes. To this shall be added one-half of the allowed percentage for over-run 

 in weight, as given in the specification for the material. 



181. The weight of the heads of shop driven rivets shall be included in the com- 

 puted weight. 



182. The computed weight of castings shall be calculated from the dimensions 

 shown on the approved shop drawings, with an addition of 10 per cent, for fillets and 

 over-run. 



183. Finished work shall be weighed in the presence of the Inspector, if practic- 

 able. The Contractor shall furnish satisfactory scales, and shall do the handling of 

 the material for weighing. 



184. Members weighing more than 5 tons shall have the weight marked thereon. 

 Bolts and rivets of the same length and diameter, and loose nuts or washers of each size, 

 shall be packed separately. Pins, other small parts, and small packages of bolts, rivets, 

 washers and nuts shall be shipped in boxes, crates, kegs or barrels; and the gross weight 

 of any package shall not exceed 200 Ibs. A list and description of the contained materi- 

 als shall be plainly marked on the outside of each package, box or crate. 



185. Long girders shall be loaded and marked so that they will arrive at the bridge 

 site in position for erection without turning. 



186. For each shipment, the Contractor shall furnish the Engineer with complete 

 copies of shipping invoices, showing the scale weights of individual pieces. 



INSPECTION 



187A. At the time of awarding the contract, the Railway Company will name to 

 the Contractor the person or persons authorized to act as Inspector. 



