SPECIFICATIONS FOR THE ERECTION OF RAILWAY BRIDGES. 



19. Inspection. The work of erection shall at all times be subject to the inspection and 



:it.iili C <H I In- Kiininrrr. 



20. Engineer. The term "Engineer," as used herein, shall be understood to mean the 

 Cliu-l Kn^im-iT of the Railway Company, or his accredited representative. 



INSTRUCTIONS FOR THE INSPECTION OF BRIDGE ERECTION.* 



(1) Study and observe the plans and specifications for steel construction. Study the masonry 

 .s ami i tu ( k i he m.isonry as built with the steel plans. 



(2) F.imili.iri/i 1 yourself with the local conditions affecting erection. 



Make the acquaintance of the principal men engaged upon the work and of local residents 

 M- interests may be affected thereby. 



(3) Obtain and study carefully the time table and be well posted concerning the time when 

 regular and extra trains are due and their relative importance. Acquaint yourself with all special 

 traffic arrangements, made because of the work in hand. 



(4) Secure full information concerning the conditions of the work in the bridge shop and the 

 probable dates of shipment. 



(5) Obtain reports of any uncompleted or erroneous work that must be attended to after 

 arrival of the material in the field. 



(6) Study the erection program in order to avoid delays and be able to recommend some 

 other procedure in an emergency. 



(7) Endeavor to have full preparations made before disturbing the track so that the erection 

 may proceed rapidly and the period of such disturbance be made a minimum. 



(8) Keep a record of the arrival of all materials. The contractor's record should be sufficient 

 if available. Strive to anticipate any shortage of material and use all available facilities to hasten 

 delivery of the needed parts. 



(9) Study the progress of the work and determine whether it is likely to be completed in the 

 time allotted. If not, endeavor to secure such additions to the force and equipment as will insure 

 such completion. 



(10) Make a daily record of the force employed and the distribution of labor, in a way that 

 will assist in following clauses 9 and 23. 



(n) Exercise a constant supervision of any temporary structure or falsework and make 

 soundings if necessary with the purpose of discovering any evidence of failure or lack of safety 

 and having it corrected before damage is done. Examine erection equipment with a view to its 

 safety and adequacy. 



(12) Be constantly on hand when work is in progress and note any damage to the metal, 

 failure to conform to the specification or any especial difficulty in assembling. 



(13) Make sure that each member of the structure is placed in its proper position. If match 

 marks are used, examine them with care. 



Endeavor to have the several members assembled in such order that no unsatisfactory make- 

 shifts need be resorted to in getting some minor member in place. 



(14) Prevent any abuse or rough usage of the material. Bending, straining and heavy pound- 

 ing with sledges are included in such abuse. 



(15) Watch carefully the use of fillers, washers and threaded members to see that they are 

 neither omitted nor misused. 



(16) Make certain that all parts of the structure are properly aligned and that the required 

 camber exists before riveting. It is possible for a structure to be badly distorted although the 

 rivet holes are well filled with the bolts. 



(17) Watch the heating of rivets to insure against overheating and to make sure that scale 

 is removed. 



Examine and test carefully all field-driven rivets and have any that are loose or imperfect 

 replaced. 



Have cut out and replaced all rivets, whether shop-driven or field-driven, that may be loosened 

 during erection and riveting. 



Prevent injury to metal while removing rivets. 



(18) Present to the contractor at once for his attention any violation of the specifications 

 or contract, and secure a correction or refer the matter to the proper authorities as soon as possible. 



(19) _Keep informed concerning the use of Company material and work trains and assist 

 in procuring such material and trains when needed, and preserve a record thereof. 



(20) Secure a match-marking diagram of any old structure to be removed and see that each 

 part of such structure is properly marked in accordance therewith. Make a record of the manner 

 of cutting the old structure apart and report any damage to the members of the old structure. 



* Am. Ry. Eng. Assoc., Vol. 14, p. 90. 



