Indoor garden in administration block
concrete portal frame supporting a jack roof in the dyeing/weaving mill and covering an area of 75,712 sq. ft.
The structural steel frame is com- posed of main and secondary tubular steel lattice girders, supported by I- stanchions at 39ft. 6in. by 36ft. 6in. centres. The stanchions are encased in 2in. concrete for fire protection.
Due to the extremely large area of flat roof in the spinning/weaving mill, two expansion joints are provided right across the building to accom- modate the anticipated temperature movement. Diagonal bracings to the roof trusses at the intermediate and both ends of the mill help stiffen the structure.
Reinforced concrete portal frames
of 42 ft. span at 52 ft. centres were chosen in preference to a steel struc- ture for the dyeing/finishing mill for reasons of resisting attack by steam and chemical fumes generated by the plant during the industrial process.
The seven-bay reinforced concrete portal frame structure is separated from the laboratory, screen-making room and the warehouse by a rein- forced concrete membrane wall at both ends. This wall was designed to act as an expansion joint between the concrete and steel structures; slots are provided in the supporting templates for the latter to move freely.
The reinforced concrete pre-treat- ment tank consists of two compart- ments a dosing tank and a mixing
tank. A series of wall baffles in the dosing tank reduces the velocities of the flow, resulting in the settlement of the suspended particles in the trade effluents from the dye baths and rinses of the dyeing/finishing mill.
In the mixing tank, effluents con- taining highly concentrated acid and alkaline compositions, discharged at different times, can be retained and neutralised by mixing with one an- other so that the Ph value falls within limits required by the health authority before final discharge into the sewer main.
Contractors
The total cost of the mill, including electric sub-station, boiler house, water tower and pre-treatment tank, but excluding air-conditioning plants, was approximately $4 million.
The main contractor was Chong Che Cheng & Co. Ltd. Subcontractors included:
Steelwork - Daiwa (M) Ltd. Suspended false ceiling - Sharikat National.
Sanitary and sewer works - Fong- hin & Co. Ltd.
Steel roof decking - Guthrie Co. (FE) Ltd.
Electrical sub-station and treat- ment tank Fong Lee Construction Co.
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Roof insulation Harrisons & Crosfield (M) Sdn. Bhd.
Fire fighting equipment
Alister & Co. Ltd.
Air conditioning - Luwa Ltd.
Mc-
LU
Dyeing/finishing mill seen from boiler house
32
Far East BUILDER, December 1969