Indian Raod cngress

Section 1900
Structural Steel
Weight of weld fillets and the weight of protective coatings shall not be included.
Weight of rivet heads shall be computed by taking the weight of 100 snap heads as given
in Table 1900-4.
When specially agreed upon, allowance for snap heads may be taken as a flat percentage
of the total weight. This percentage may be taken as 3 percent or modified by mutual
agreement.
Dia of Rivet as manufactured
mm
Table 1900-4 Weight of Rivet Heads
Weight of 100 snap heads
kg
12 1.3
14 2.1
16 3.4
18 4.45
20 6.1
22 8.1
24 10.5
27 15.0
30 20.5
33 27.2
The Contractor shall supply detailed calculation sheets for the weight of the metal in the
fabricated structure.
No additions shall be made for the weight of protective coating or weld fillets.
Where computed weight forms the basis for payment, the weight shall be calculated for
exact cut sizes of members used in the structure, deductions being made for all cuts,
except for rivet holes. Additions shall be made for the rivet heads as mentioned above.
When specially agreed upon, the basis for payment may be the bridge weight complete,
according to specifications included in special provision of the Contract.
1909 RATE
The contract unit rate for the completed structural steel work shall include the cost of all
materials, labour, tools, plant and equipment required for fabrications, connections, oiling,
painting, temporary erection, inspection, tests and complete final erection as shown on
the drawings or as directed by the Engineer and as specified in these Specifications.
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