56 STANDARD SPECIFICATIONS 



253. Machine-Finished Surfaces. Machine-finished surfaces 

 shall be coated with white lead and tallow before shipment or 

 before being put out into the open air. 



254. Painting Omitted. Rods, wires, hoops, etc., used 

 for concrete reinforcement and all other steelwork, or parts of 

 steelwork, entirely embedded in concrete shall not be painted. 



255. Painting after Erection. After the structure is erected 

 the metal work shall be cleaned of scale, rust, and dirt, and then 

 thoroughly and evenly painted. 



Steelwork in buildings, or where otherwise protected from 

 exposure, shall have one additional coat of paint, mixed with 

 pure linseed oil, or as specified by the Engineer. 



Steelwork in bridges, or other exposed structures, shall have 

 two additional coats of paint as specified. 



The various coats of paint shall be of distinctly different 

 shades or colors, and one coat must be allowed to dry before 

 the next is applied. 



ERECTION 



256. When the Contractor Erects. Whenever the contractor 

 is required to do the erection this requirement shall be specific- 

 ally stated in the contract. 



The erection will then include the removal of any existing 

 structure, all necessary hauling, the unloading of the materials 

 and their proper care until the completion and acceptance of 

 the work, as specified in Pars. 257 to 263. 



257. Removal of Old Structure. Whenever new structures 

 are to replace existing ones the latter shall be carefully taken 

 down, marked and scheduled to facilitate re-erection, and removed 

 by the contractor to some place as specified in the contract. 



258. Interruption of Traffic. All operations shall be so con- 

 ducted as not to impede or interrupt the work of other con- 

 tractors, the traffic of any railroad, nor close any thoroughfare 

 or waterway, nor conflict with any law, regulation, or ordinance 

 of any properly constituted authority. 



259. Permits. Before commencing operations the contrac- 

 tor shall, at his own expense, obtain all necessary permits and 

 comply with their requirements. 



260. Erection. The contractor shall furnish, at his own 

 expense, all necessary staging, falsework, materials, and tools, 



