Pitched Roof Wall Plate Detail

Plate level is the timber plate which is going to hold the roof structure including the roof joists hips and roof rafters.

Pitched roof wall plate detail.

Normally trussed rafter roofs and traditional cut roofs should be supported on timber wall plates. Line up wall plate against existing joists and make a mark on the wall plate in line with the centre of the joists. When it comes to pitched rooftop construction there are a few different options. When the measurement is equal the plates are square.

Pitched roofs are generally used where rainfall is heavy. 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. Drill holes at these marks to allow a 6 nail to be driven through the wall plate into the joists. Lay a thick layer of cement on existing brick work then place the wall plate on this and get a good level.

When fixing the wall plates down onto the brickwork if the building is square rectangle measure from corner to corner diagonally. Hipped gabled shed and mansard. Wall plates should be as detailed in clause d6 b with regard to the table concerning minimum sizes. Pitched roof is a type of roof which is provided with some slope as structure covering.

The wallplate is then used to secure the rafter to. The wallplate is secured to the internal wall separated by dpc. Wall plates should be joined using half lapped joints at corners and in running lengths. 38 x 100mm or in accordance with local practice.

The cavity is closed with a proprietary cavity closer. A pitched rooftop is very distinct to other roofs with less obvious angled options than may be found in some houses. We know that the roofs are generally provided at top to cover and protect the structure from different weather conditions. 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.

The wall while the horizontal strut loads cancel each other out if the roof is symmetrical. Fixings used to connect the roof structure to the wall plate should be specified according to the roof construction and exposure of the site. The connections and general detail here should be provided by the design engineer. 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.

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. A pitched roof is very angular in natural. A notch is taken out of the rafter known as the birds mouth. Setting out the roof wall plates the extension project is now up to plate level so it s time for pythagoras theorem.

Fixings to connect the roof structure to the wall plate should be specified having regard to the roof construction and the exposure conditions of the site.