BID Document for Guest House with Boundary Wall.pdf - Integrated ...

Bricks shall be of first class quality, well burnt in kiln, sound hard , true to shape and of the standard
dimensions, and to be got approved by the Engineer-in-charge before use.
3.4 Plasticiser:
Super-Plasticiser of SIKA / CICO make conforming to IS: 2645-1975 & IS: 9103-1974 must be used.
3.5 Bolts & Nuts:
Make: GKW / TATA or Equivalent
Bolts and nuts conform to the requirements of turned grade bolts of symbol 4D, 5D and 53 specifications - IS:
1363 (latest edition) – Technical supply conditions for threaded fastener. The screw thread shall conform to
coarse series – medium class referred in IS: 1367 (latest edition)/.
4.0 MAT CONCRETE OR FOUNDATION CONCRETE
100 mm thick concrete of proportion 1:2:4 with 20 mm downgraded stone chips (Chandil / Pakur variety) shall
be provided below all the foundations and structures over a layer of Brick Flat soling as approved by
Engineer-in-charge.
5.0 EXCAVATIONS AND FILLING
5.1 Excavations necessary for the works may require digging and penetration through any soil or strata, removal
of stems and roots of tress, breaking and removal of old structures, dewatering from all sources e.g. rain,
seepage, leakage, subsoil water etc. protecting the trench and well pit and adjoining structures and service
lines, by timbering, shoring, propping, sheet piling etc. Excavation shall be done only upto the required level
and all extra depth of excavation, if made, has to be filled in with materials and manners approved by the
Engineer-in-charge.
5.2 All excavated materials must be carefully deposited in spoil bank allowing the access to workers and plant
machinery. The toe of the spoil bank shall be set at sufficient distance and should not be less than 3 to 4 times
the depth of excavation. If so ordered by the Engineer-in-charge, the excavated materials have to be carried
away and placed within a lead of 75 mtr. Such quantity of extra materials as may be required, shall be brought
back to back-fill the trench with proper consolidation in layers of 150 mm thickness, properly rammed.
Flooding of trench pit during back filling may be resorted to if so directed by the Engineer-in-charge.
5.3 Contractor must make good at his own cost, all damages or settlements sustained by any structure founded on
the trench or adjacent to the trench.
5.4 All excavated materials will remain the property of the Government and the contractor shall be responsible for
their custody till the completion of the works or taking over by the Department.
5.5 Fill below the pipe trenches, inside building below the floor etc. shall have to be done with sand free from any
foreign material.
5.6 In case of over-excavation below the stipulated depth the space between the foundation bottom and overexcavated
area shall be filled up with silver sand consolidated by watering and vibrating. Where such consolidation
is not achievable, the depth of excavation shall be filled with plain cement concrete of mix 1:4:8. The cost in
both the cases shall have to be borne by the Contractor.
5.7 All materials obtained from any excavation required to be carried out under this contract will be utilized by
the contractor for spreading over the land uniformly at his cost.
6.0 PROTECTION WORKS:-
6.1 Damp proofing work:
Unless otherwise specified, damp proof course shall be 25 mm thick cement concrete with stone chips (Prop.
1:2:4) with 3% “CICO” or specified percentage of “Rola / Sica” or similar approved water proofing compound
by weight of cement. The proportioning, mixing, laying etc. shall be done in conformity with relevant I.S.
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