Pitched Roof Wall Plate Detail

The extension part 7.

Pitched roof wall plate detail.

Wall plates should be joined using half lapped joints at corners and in running lengths. When the measurement is equal the plates are square. 38 x 100mm or in accordance with local practice. B 1 3 cut roofs purlin details support at wall plates the rafters are usually birdsmouthed over and skew nailed to the wall plate although other.

Where trussed rafter roofs are not subject to uplift a minimum of two 4 5mm x 100mm galvanized round wire nails skew nailed one on each side of the trussed rafter or truss clips fixed in accordance with the manufacturer s instructions are acceptable. The connections and general detail here should be provided by the design engineer. Wall plates should generally be in lengths of not less than 3m but shorter lengths should extend over at least 3 joists rafters or trusses. Plate level is the timber plate which is going to hold the roof structure including the roof joists hips and roof rafters.

In scotland 100mm x 25mm wall plates should be used in long lengths butt jointed. We know that the roofs are generally provided at top to cover and protect the structure from different weather conditions. The wall while the horizontal strut loads cancel each other out if the roof is symmetrical. When fixing the wall plates down onto the brickwork if the building is square rectangle measure from corner to corner diagonally.

Pitched roofs are generally used where rainfall is heavy. Another way when the roof is too large for that or there are not four corners is to use the 3 4 5 method shown here to make sure the corners are at a perfect 90 degrees. If buildings are constructed with some limited width then also we can go for pitched roofs.