NATIONAL ALUMINIUM COMPANY LIMITED - Rites

14.0 MONORAILS AND HOISTS
14.1 GENERAL
Suitable handling arrangements shall be provided for all equipment’s included in
Contractor’s scope to transfer the equipment to maintenance area within the building
and/or to transfer the equipment outside the building upto ground level for further
transportation by the Owner. For this purpose Contractor shall provide monorails and hoist
blocks with cross travel facility.
14.1.1 CODES AND STANDARDS
The design, manufacture, inspection and testing of Monorails and Hoists shall comply with
all the currently applicable statutes, regulations and safety codes in the locality where the
equipment is to be installed. The Monorails & Hoists shall conform to the latest edition of
the following standards & codes. Other internationally acceptable standards/codes, which
ensure equal al or higher performance than those specified, shall also be accepted. Nothing in
this specification shall be construed to relieve the contractor of the required statutory
responsibility. In case of any conflict in the standard and this specification, the decision of
the Owner/RITES shall be final and binding.
14.2 DESIGN REQUIREMENTS
• IS:3938 : Specification for Electric Wire Rope Hoist
• IS:3832 : Chain pulley blocks
• IS:2429 : Round steel short link chain
• IS:6216 :Short link chain grade 80
• IS:8610 :Points hooks with shank for gener general al engineering purposes
• IS:210 : Cast Iron Castings
14.2.1 For the Hoists with more than 2.0 tonne lifting capacity or more than 10.0 M lift, with the
exception of hoists for GTU and bend pulleys motor operated hoist blocks for both long
travel and lift shall be provided. Other hoist blocks shall be of hand operated type for both
travel and lift. For hoists for GTU’s and bend pulleys clause no. 1.02.18 shall be referred to.
All monorails coming out of the buildings shall be provi provided ded with electric hoist blocks,
irrespective of load and lift. Minimum 3 meter length of Cantilever shall be provided in
monorails coming out of the building to lower the equipment to ground level clearing the
building sidewalls and any other facilities be beneath neath the floor upto ground level.
14.2.2 The exact lift/travel and the number of the hoisting mechanisms and the mode of lifting
equipment’s to various floors of the buildings shall be as decided by the Owner Owner/RITES at the
time of detailed engineering. Us Use e of single hoist shall be avoided for handling more than one
equipment. Clear height shall be maintained when handling one equipment over other, in
such case dismantling of any equipment shall not be permitted. The center line of monorail
shall not deviate e by more than 500 mm from the center of gravity of any equipment that is
to be lifted. Contractor shall take clear note of the fact that the number and monorail
hoisting systems shall also be decided considering the movement of the equipment being
Technical Specification:Sec-4,System System Parameters, Operation & Control Philosophy
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