PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
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The gantry shall be of single/double girder construction and traveling track of the<br />
crane shall be of 50 mm MS sq. bar supported on MS base plate of 8 mm. thick at<br />
an interval of 500 mm. The load chain shall be of grade M 8 conforming to IS 3109<br />
or grade 80 of IS 6216. Hand chain shall be at least grade 30 of IS 6216. The crane<br />
shall consist of long travel trolley and the gantry girder shall be suitable for<br />
movement of cross travel along with hoisting block.<br />
All gears shall be machine cut from solid cast or forged steel blanks. All pinions<br />
shall be of forged carbon / heat treated alloy steel. Axles and shafts shall be of<br />
carbon steel. Chain Pulley Block for H.O.T crane shall be provided with an<br />
automatic load brake switch to prevent self lowering of load and shall be of Screw<br />
and Friction Disc Type and the gearing system shall be resistance less during<br />
hoisting. The lifting hook shall be forged heat treated alloy or carbon steel<br />
conforming to IS 8610/IS 3815.Overload test with 150% of rated load shall be<br />
carried out for the chain pulley block and trolley and overload test with 125% of<br />
rated load shall be carried out for the entire crane assembly.<br />
19.21 Hand chain.<br />
The length of hand chain for the travel trolley and cross travel of H.O.T crane shall<br />
be such that the lowest point of suspended loop shall stand at least 500mm above<br />
the operating floor level. Hand chain wheel shall be flanged and guides shall be<br />
provided to prevent coming out or jamming out of chain.<br />
19.22 Bearings.<br />
All bearings to be fitted with H.O.T crane and Chain Pulley Block shall be pre<br />
lubricated and sealed type or provided with filling and seals for pressure lubrication.<br />
The crane and gantry structure shall be degreased, cleaned and all rust, scales, sharp<br />
edges removed and treated with one coat of primer and finished with two coats of<br />
final paints as per specification.<br />
The following documents are to be furnished by the contractor after award of the<br />
work:<br />
(a) G.A. Drawing of crane with all details from the manufacturer.<br />
(b) Note on erection and testing by the manufacturer.<br />
(c) Test certificate for hook, chain and chain pulley block assembly including overload<br />
test report of the crane as per standard proforma etc. (to be furnished prior to supply<br />
of the crane).<br />
DTS : Detailed Tender Specification. Page 204
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