INSPECTION, PAINTING, AND ERECTION 55 



the work. If the inspector, through an oversight or otherwise, 

 has accepted material or work which is defective or contrary 

 to the specifications, this material, no matter in what stage of 

 completion, may be rejected by the purchaser. 



245. Shop Plans. The purchaser shall be furnished complete 

 shop plans. 



246. Shipping Invoices. Complete copies of shipping invoices 

 shall be furnished to the purchaser with each shipment. 



247. Test to Prove Workmanship. Full-sized tests on eye- 

 bars and similar members, to prove the workmanship, shall be 

 made at the manufacturer's expense and shall be paid for by 

 the purchaser at contract price if the tests are satisfactory. If 

 the tests are not satisfactory the members represented by them 

 will be rejected. 



248. Eye-Bar Tests. In eye-bar tests the minimum ultimate 

 strength shall be 55,000 Ibs. per sq. in. The elongation in 10 

 ft., including fracture, shall not be less than 15 per cent. Bars 

 shall generally break in the body and the fracture shall be silky 

 or fine granular, and the elastic limit as indicated by the drop 

 of the mercury shall be recorded. Should a bar break in the 

 head and develop the specified elongation, ultimate strength and 

 character of fracture, it shall not be cause for rejection, pro- 

 vided not more than one-third of the total number of bars 

 break in the head. (Par. 224.) 



PAINTING 



249. Cleaning. Steelwork, before leaving the shop, shall 

 be thoroughly cleaned and given one good coating of pure lin- 

 seed oil, or such other paint as may be called for in the contract, 

 well worked into all j oints and open spaces. 



250. Contact Surfaces. In riveted work the surfaces com- 

 ing in contact shall each be painted before being riveted together. 



251. Inaccessible Surfaces. Pieces and parts which are not 

 accessible for painting after erection, including tops of stringers, 

 eye-bar heads, ends of posts and chords, etc., shall have a good 

 coat of paint before leaving the shop. 



252. Condition of Surfaces. Painting shall be done only 

 when the surface of the metal is perfectly dry. It shall not 

 be done in wet or freezing weather, unless protected under cover. 



