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The Courtyard Theatre is 40.8 x 26.6m and just under 14m high. It has a shallow steel portal frame of HEA 280 columns, and roof beams supporting lighting and access bridges. The Trocal singleply membrane roof protects thermal and acoustic insulation layers, with cementitious board interlayers, on a profiled structural roof deck.

The exterior selfsupporting 5mm-thick profiled Cor-ten steel panels were chosen for their natural, maintenance-free finish and warm colour that sets off the brick and tile of Stratford.

The 2,028mm x 13.95m panels are formed of two profiles, factory welded at the vertical seam and bolted together on site with 5mm-thick steel connection plates. Base plates are bolted to the concrete slab, and folded top plates to steel edge beams. At each corner of the building a Cor-ten corner plate is fixed to the projecting edges of adjacent panels, sealed with Compriband strips. Doors are clad in Cor-ten.

Behind the panels is a 160mm layer of mineral wool with acoustic pads. Internal walls are lined with stained 15mm fire-rated ply panels on U-shaped profi les.

A wide gutter at the eaves is lined with roofing material.

Downpipes are hidden by a Cor-ten cover plate.

By Susan Dawson Drawings based on those of main contractor ZNS Van Dam

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