Pitched Roof Wall Plate Detail

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.

Pitched roof wall plate detail.

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. 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. In scotland 100mm x 25mm wall plates should be used in long lengths butt jointed. When the measurement is equal the plates are square.

The connections and general detail here should be provided by the design engineer. Fixings used to connect the roof structure to the wall plate should be specified according to the roof construction and exposure of the site. Setting out the roof wall plates the extension project is now up to plate level so it s time for pythagoras theorem. 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.

38 x 100mm or in accordance with local practice. Wall plates should be joined using half lapped joints at corners and in running lengths. Pitched roofs are generally used where rainfall is heavy. When fixing the wall plates down onto the brickwork if the building is square rectangle measure from corner to corner diagonally.

If buildings are constructed with some limited width then also we can go for pitched roofs. The wall while the horizontal strut loads cancel each other out if the roof is symmetrical. Pitched roof is a type of roof which is provided with some slope as structure covering.