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114
BRITISH KINEMATOGKAPHY
Vol. 18, No. 4
last component of structure to be completed. An annexe block was subsequently added, to provide toilet and dressing-room accommodation for the ever-increasing staff requirements of the Telekinema. This projects into the garden area at the York Road side of the building, and is constructed of reinforced concrete with simple finishings.
Cross-section of Building
The main structural elements had to be clothed in various forms of insulational and
W outer skin
I * ROCKWOOL IV HARD SKIN ,-2V AIRSPACE I * ROCKWOOL
I 10" R C WALL
, 2 "ROCK WOOl
3" AIRSPACE
I " HARD PLASTER
MAIN WALL
insulational diagram of the roof itself. Below this membrane, hangers with an insulational break of rubber are slung to support the suspended ceiling of metal lathing and plaster, or of perforated fibrous plaster with 2 ins. or 4 ins. of rockwool for those areas, adjacent to the screen, where sound-absorbing wall linings are required.
Sound Isolation
The main flank walls of the theatre section are constructed, as was noted before, of
STEEL TRUSS
4' DRY
CONCRETE
ROCKWXX BLANKET
SUSPENDED CEILING
KOOF
Fig. 6. Diagram showing the Construction of the Wall and the Roof.
" finishing " techniques ; the diagrams showing these (Fig. 6) may be described as follows : —
The main roof, constructed as already described, has a 3-inch concrete cover plus asphalte roofing, with a pure aluminium " trim " or flashing. On the topside of the lower layer of sheeting of these bowstring units, rockwool blankets are laid loose, and these are weighted down with dry concrete of 4-inch depth ; this latter mass is, therefore, not in direct contact with any structural steel and forms the final chain in the
10-inch reinforced concrete. This panel, which reveals externally the upper section of the " lobster-claw " form, is faced with a " quilt " constructed of the following layers or membranes: —
1. Light rendering for finish, on expanded metal, with a " quilted " indentation at the point of support of each of the studs described later.
2. 1 inch of rockwool covered both sides with bituminous paper.
3. 1| ins. cement render on metal lathing hung on a series of studs which are anchored in insulated rubber mountings in the 10-in.