Indian Raod cngress

Section 1900
Structural Steel
Hammering which will injure or distort the members shall not be done. Bearing surface or
surfaces to be in permanent contact shall be cleaned, before the members are assembled.
The truss spans shall be erected on blocking, so placed as to give the proper camber.
The blocking shall be left in place until the tendon chord splices are fully riveted and all
other truss connections pinned and bolted. Rivets in splices of butt joints of compression
members and rivets in railings shall not be driven until the span has been swung.
All joint surface for bolted connections including bolts, nuts, washers shall be free from
scale, dirt, burrs, other foreign materials and defects that would prevent solid seating of
parts. The slope of surface of bolted parts in contact with bolt head and nut shall not
exceed 1 in 20, plane normal to bolt axis, otherwise suitable tapered washer shall be
used.
All fasteners shall have a washer under nut or bolt head whichever is turned in tightening.
Any connection to be riveted or bolted shall be secured in close contact with service bolts
or with a sufficient number of permanent bolts before the rivets are driven or before the
connections are finally bolted. Joints shall normally be made by filling not less than
50 percent of holes with service bolts and barrel drifts in the ratio 4:1. The service bolts
are to be fully tightened up as soon as the joint is assembled. Connections to be made by
close tolerance or barrel bolts shall be completed as soon as practicable after assembly.
Any connection to be site welded shall be securely held in position by approved methods
to ensure accurate alignment, camber and elevation before welding is commenced.
The field riveting, welding, bolted and pin connection shall conform to the requirements of
Clause 1904 as appropriate.
The correction of minor misfits involving harmless amounts of reaming, cutting and chipping
will be considered a legitimate part of erection. However, any error in the shop fabrication
or deformation resulting from handling and transportation which prevents proper assembling
and fitting up of parts by moderate use of drifts or by a moderate amount of reaming and
slight chipping or cutting shall be reported immediately to the Engineer and his approval of
the method of correction obtained. The correction shall be made in the presence of the
Engineer.
1905.7 Field Inspection
1905.7.1 General
All materials equipment and work of erection shall be subject to the inspection of the
Engineer who shall be provided with all facilities including labour and tools required at all
reasonable times. Any work found defective is liable to be rejected.
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