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frame, and provide up to one hour fire resistance for the complete ceiling.

The floor skin is formed from 21 mm. thick chipboard (flooring grade) on to which a p.v.c. resilient floor covering is fixed. The ends of the floor are closed with an external 3⁄4 in. thick Asbestolux fascia, which is finished black. The floor is provided with a minimum of three removable sections of top floor skin, to facilitate the laying of services in the inter- mediate floor.

Walls

Each end wall consists of two ver- tical columns with separately framed infill panel. The columns are of 4 in. by 211⁄2 in. Douglas Fir for single- storey only or are 4 in. by 2 in. by 8g mild steel hollow sections for multi-storey, secured by screws to the infill panel and to the intermediate floor beams by a flexible nylon strap hinge, or to the main roof beams by miki steel pivotal plates, which enable the building to be erected with preci-

sion.

Each pair of double or multi-storey columns is provided with 3⁄41⁄2 in. thick Asbestolux linings and coverboards, both internally and externally. The wall panels incorporate windows, doors or solid sections as required.

Both fixed and opening windows are hung on outwards opening friction stays. Fanlights are hung on 111⁄2 pairs of 3 in. galvanized hinges.

External doors measure 6 ft. 6 in.

by 2 ft. 9 in. and are 14 in. thick. They are of the flush type with ex- terior grade plywood with hardwood edges and have 3 in. mortice lock and silver anodized aluminium furniture fitted. External double doors have re- bated meeting styles and are fitted with rebated mortice locks. Glazed doors are back puttied, sprigged and beaded.

The wall infill panels are faced ex- ternally with 4 in. thick Douglas fir plywood with a textured paint finish. Internal linings are of in. thick asbestos board, while all door and window furniture is fitted in anodized aluminium and chromium plated steel.

Plain or half-glazed prefabricated asbestos board faced internal parti- tions can be supplied and fixed ac- cording to requirements. Standard partitions are based on a 4 ft. plan- ning grid.

All wall and partition surfaces are factory painted.

Roofs

Roofs are constructed of a series of stressed skin interlocking panels screwed and bonded to two stressed skin box beams. The ends of these are enclosed by fascias of a similar depth. The roof panels are formed with a top skin of 5/16 in. underlay sheathing of plywood and a lower skin of % in. asbestos board bonded with urea-formaldehyde adhesive to Douglas fir members.

a double sided aluminium foil mem- brane, placed in the cavities of the roof panels. The stressed skin box beams are constructed of two 1⁄4 in. skins of plywood bonded to 2 in. by 2 in. and 4 in. by 2 in. frame mem- bers with urea-formaldehyde adhesive. The depth of the beams is 16 in.

The roof covering is a single layer of 130 lb. per 75 yd. asbestos-based roofing felt, bedded with hot bitumen to the roof decking. A further layer may be site-applied where required.

The weather joints between roofs of adjoining pack buildings are made by a section, coupling two continuous upstand flashings.

The roof is laid to a monolateral fall and rainwater disposal is by means of an outlet discharging to a plastics hopper head and 21⁄2 in. dia- meter plastics rainwater pipe.

Wind Bracing

External wind bracing panels are provided for inclusion in the gable ends of the Terrapin multi-storey buildings. The structure is designed to have one windbraced panel per floor at each gable end.

The minimum number of Terrapin multi-storey units which may be used side by side is four. If a greater num- ber than this is used, a wind bracing partition panel is employed at the junc- tion of each consecutive fourth unit.

The external wind bracing panels are located immediately adjacent to Additional insulation is provided by and at right-angles to the end wall

Footings in position

Floor component released roof raised wall panels hinge down

Pack lowered on

to footings

Erected unit

Far East Architect & Builder August, 1966