The work covered by this specification consists of furnishing ad erecting of structural steel complete in strict accordance with this specifications ad the applicable drawings.
All structural steel shall be of standard sections
as marked on the drawings ad shall be free of scale, blisters, laminations,
cracked edges ad defects of any sort. If the structural steel
is not supplied
by the Department
and the Contractor
is required to
bring such steel,
the Contractor shall furnish duplicate copies of all mill orders and /
or also the test report received from the mills, to satisfy the
Engineer-in-charge. All structural steel and electrodes shall comply in all
respects with relevant I.S.S. for structural steel.
All workmanship shall be of first class quality in
every respect to get greatest accuracy to ensure that all parts will fit
together properly on erection. All ends shall be cut true to planes. They must
fit the abutting surfaces closely. All stiffeners shall fit tightly at both
ends. All holes in plates and section between 12mm and 20 mm thick shall be
punched to such diameter that 3mm of metal is left all around the hole to be
cleaned out to correct size by reamer.
The base connection shall be provided as shown on drawings and
the greatest accuracy of workmanship shall be ensured to provide the best
connections. Figured dimensions on the drawings shall be taken.
and Marking :
Erection ad fabrication shall be according to IS
800-1984 section -11. During erection, the work
shall be securely braced and fastened temporarily to provide safety for all
erection stresses etc. No permanent welding shall be done until proper
alignment has been obtained. Any part which do not fit accurately or which are
not in accordance with the drawings and specifications shall be liable to
rejection and if rejected, shall be at once be made good. Engineer-in-charge
shall have full liberty at all reasonable times to enter the contractors
premises for the purpose of inspecting the work and no work shall be taken
down, painted r dispatched until it has been inspected and passed. The
contractor shall supply free of charge all labour ad tools required for testing
at Site :
The contractor shall deliver the component parts
of the steel work in an undamaged state at the site of the works and the
Engineer-in-charge shall be entitled to refuse acceptance of any portion which
has been bent or otherwise damaged before actual delivery on work. Shop
drawings of structural steel based on contract drawings hall be submitted to
the Engineer-in-charge. The necessary information for fabrication, erection,
painting of structure etc. must be furnished immediately after acceptance of
should be strictly according to IS. 1477-1971 (Part-I-Pretreatment) and IS
1477-1971 (part-II painting). Painting should be carried out
on dry surfaces free from dust, scale etc. The paint shall be approved by the
Engineer-in-charge. Once coat of shop paint (red lead) shall be applied on
steel, except where it is to be encased in concrete or where surfaces are to be
Welding shall be in accordance with IS.
816-1969,IS819-1957, IS 1024-1979, IS1261-1959, IS 1323-1982 and IS 9595-1980
as appropriate. For welding of any particular type of joint, welders shall give
evidence of having satisfactory completed appropriate test as described in ay
of IS 817-1966, IS 1393-1961, IS 7307 (part-I) -1974, IS
7310 (part-I) 1974 and IS 7318 (part-I) 1974 as relevant.
Covered electrodes shall conform to IS 814
(part-I) - 1974 and IS814 (part-II)- 1974 or IS
1395-1982 as appropriate. Filler rods and wires for gas welding shall conform
1278-1972. The bar wire electrodes for submerged are welding
shall conform t IS 7280-1974. The combination of are and flash shall satisfy
the requirements of IS 3613-1974.
The filler rods ad bare electrodes for gas shielded metal, are
welding shall conform to IS 6419-1971 and IS 6560-1972 as appropriate .
welding (direct or alternating current) or Oxyacetylene welding may used. Field
welding may be used. Field welding shall be by D.C.