Setting out the roof wall plates the extension project is now up to plate level so it s time for pythagoras theorem.
Pitched roof wall plate detail.
Normally trussed rafter roofs and traditional cut roofs should be supported on timber wall plates.
Pitched roof is a type of roof which is provided with some slope as structure covering.
The wallplate is secured to the internal wall separated by dpc.
We know that the roofs are generally provided at top to cover and protect the structure from different weather conditions.
Plate level is the timber plate which is going to hold the roof structure including the roof joists hips and roof rafters.
The extension part 7.
In scotland 100mm x 25mm wall plates should be used in long lengths butt jointed.
Hipped gabled shed and mansard.
The connections and general detail here should be provided by the design engineer.
Pitched roofs are generally used where rainfall is heavy.
Lay a thick layer of cement on existing brick work then place the wall plate on this and get a good level.
A pitched roof is very angular in natural.
Wall plates should be as detailed in clause d6 b with regard to the table concerning minimum sizes.
When it comes to pitched rooftop construction there are a few different options.
A notch is taken out of the rafter known as the birds mouth.
The wallplate is then used to secure the rafter to.
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.
When fixing the wall plates down onto the brickwork if the building is square rectangle measure from corner to corner diagonally.
38 x 100mm or in accordance with local practice.
Eaves detail the eaves detail shows where the roof members and coverings meet the wall of the dwelling.
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.
When the measurement is equal the plates are square.
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.
Fixings used to connect the roof structure to the wall plate should be specified according to the roof construction and exposure of the site.
Wall plates should be joined using half lapped joints at corners and in running lengths.
The wall while the horizontal strut loads cancel each other out if the roof is symmetrical.
The cavity is closed with a proprietary cavity closer.
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.
A pitched rooftop is very distinct to other roofs with less obvious angled options than may be found in some houses.
