with a 3 in. top slab, supported on longitudinal main beams with 24 ft. and 36 ft. alternate spans. The main beams are 24 in. x 36 in. overall generally.
The 24 ft. spans are splayed to a depth of 24 in. at mid span to permit the crossing of services across the building without increasing the ceiling depth or cutting holes in the main beams. The equivalent thickness of the floor slab was less than 8 in. Columns are uniformly 24 in. x 24 in. through- out. A 1⁄21⁄2 in. expansion joint is provided across the podium.
The structural floor system of the tower is similar to that of the podium. As there were to be no bracing walls to the tower, the service core com- prising lift shafts, staircases and vertical ducts, was designed to resist wind stresses as a vertical cantilever, thereby enabling the columns in the office area to be reduced in size. A further reduc- tion in the size of the columns was achieved by employing composite col- umn construction using steel joist cores for the tower columns, which sup- ported about 1,500 tons at the bottom storey to be uniformly 24 in. x 24 in. over the full height of the building, at marginal extra cost.
The lift shaft was slipformed, at the rate of one storey per day, in advance of the tower construction. A temporary lift was installed for trans- portation of labour and for inspection. Details of the slipforming were pub- lished in Far East Architect and Builder,
July 1967. The rest of the tower con- struction was carried out by conven- tional methods using hoists to trans- port materials vertically, and took about four weeks per floor.
Work on the substructure com- menced on March 1, 1965, sheet piling on March 20, 1965 and bearing piles on April 20, 1965. The piling was completed on August 2, 1965. The substructure was concreted between October 13, 1965 and April 24, 1966.
Contractors
The supersturcture contract was awarded on May 1, 1966 and was com- pleted between May 1, 1966 and August 3, 1967.
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Substructure waterproof grouting - Treego (Sdn.) Bhd.
Air-conditioning Singapore Ltd.
Electrical installation (Singapore) Pte. Ltd.
Lifts
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Sime Darby
GEC-AEI
China Engineers Ltd.
Sanitary and drainage installations Watts and Baker Ltd.
Curtain wall and aluminium works
- Diethelm & Co. Ltd.
Demountable partitions
Waugh (S) Pte. Ltd.
Guthrie
Ventgrid suspended ceiling system - Brady's (S) Ltd.
Interior works
Co.
Booking hall - Patent Furniture
Boardroom interior
Furniture Co. Ltd.
Cheng Meng
Boardroom lounge furniture - Die- thelm & Co. Ltd.
Theatrette seating, office and wait- ing areas furniture Yang Ah Kang
The total cost was approximately & Sons. M$12.3 million.
Piling and substructure work was carried out by Wing Co. The main con- tractor for the superstructure was Loke Hong Kee.
Sub-contractors included:
Ltd.
Curtain tracks
Diethelm & Co.
Curtain furnishing materials - La Belle Boutique (KL).
Boardroom and lounge special light fittings Malayan Plastics.
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MEM
electrical products are known and
appreciated everywhere
Sole Agents:-
INNISS & RIDDLE (CHINA) LIMITED,
608 - 616, Prince's Building, 6th Floor,
P. 0. Box 73, Hong Kong.
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4·4 14 TD
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MEM electrical accessories comprise full ranges of surface and flush mounting switches and ring circuit accessories (socket outlets and fused spur boxes, switched or unswitched). Finishes include moulded and metalclad, including stainless steel.
MIDLAND ELECTRIC MANUFACTURING CO. LTD. Reddings Lane Tyseley Birmingham England
MEM
Far East BUILDER, May 1969
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