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BRITISH KINEMATOGRAPHY
Vol. 18, No. 4
Fig. 4. Entrance Foyer to the Telekinema, showing the Viewing Window of the Projection Room.
tion of the types of structure employed, and the sound insulation used, may now be made : —
1 . Acess block containing main entrance, main staircase, usual " offices " and " crossovers " to the stalls and circle seating, together with the viewing platform facing the back of the projection room.
2. Main theatre, containing two subsidiary components : —
(a) Balcony steppings, projection room and suspended floor over the back rows of the stalls.
(6) The screen chamber, containing also intake ventilation equipment, at the far end of the theatre ; this forms a separate structure, projecting from thr end of the main theatre block.
Main Structure
These elements of the Telekinema are constructed in the following manner: —
The main structure is of reinforced concrete 10 ins. thick, forming the " tanking " to ground level — to deal with Hood levels on this site — and carried up to the roof line on side walls, together with certain flank walls
acting as wind bracings. This part of the structure is roofed with prefabricated bowstring units made entirely of dovetail steel sheet units of standard dimensions: o4 ft. span, 3 ft. height at centre of chord, 2 ft. in width, anchored to the 10-in. reinforced concrete walls, and carrying a suspended ceiling internally.
The access block is similarly constructed of reinforced concrete, without beams or columns, and is structurally disconnected from the main theatre by a 1-inch insulational gap ; thus this element of the building, located closest to the railway bridge, is able to vibrate independently without transmitting sound to the main structure.
The balcony steppings, together with the projection room floor, carrying a suspended ceiling over the back row of stalls, are constructed of a skeletal framework of structural steel ; a portion of the main girders is revealed inside the projection room. These elements are enclosed by prefabricated dovetail steel sheet units ; this method allowed a