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Laying the joists

Lay the joists out in the traditional manner on the supporting masonry at the specified pitch ensuring that:


there is a minimum bearing length of 90 mm on the inner leaf of the wall and


the joist stops short of the outer face of the inner leaf by at least 6 mm ()


if using an I-beam joist, the voids to each side of the joist web are filled for at least 70 mm with plywood packing pieces or a proprietary end fitting as supplied by the joist manufacturer.

Note: the joist is supported, and remains supported, directly on the masonry.