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Monopitch roof with a zinc gutter and hopper

working details

In contrast with the relatively cellular bedrooms, the dining hall of the care centre is a large single-storey space. It has a light and airy character, created by a monopitch roof with a clerestory which admits high-level light from the east and a fully glazed west wall which faces the 'village green' and chapel.

The roof structure consists of four raked glulam beams braced with steel tie-rods. The beams, supported by four vertical 220mm diameter CHS columns at the west wall, slope upwards to the apex, where they are supported by four 220mm diameter CHS columns which rake inwards from the east wall.

A continuous clerestory runs below the apex and the roof below it extends beyond the east wall to form an external canopy; its soffit, a curved bulkhead clad with pine slats, contains a service duct.

The top of each column has a semi-spherical steel cap and a 15mm thick steel plate welded to it. The plate is flitched to the beam and bolted with recessed bolts and 60mm diameter washers.

The east wall is fully glazed with a composite timber framing system.The mullions are braced with plates flitched between them and welded, via a projecting fin, to the glulam flitch plates.

The roof is of pre-weathered zinc with standing seams, except for a 1.5m strip of glazing which follows the 13 degree plane of the roof down to the east wall.A zinc gutter runs just above the glazed strip; it projects beyond the north wall and terminates in a curved end section which supports a conical zinc hopper.

The hopper discharges rainwater onto four steel chains, collared together, which act as a downpipe.

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