Pitched Roof Wall Plate Detail

Wall plates shall be bedded to distribute roof loads and fixed to prevent wind uplift roof construction details should be available on site particularly for combination and specialist roofs.

Pitched roof wall plate detail. Setting out the roof wall plates the extension project is now up to plate level so it s time for pythagoras theorem. In order for all the roof components to work they must be square parallel level and fixed down properly. Getting the wall plates or top plates as they are sometimes called right is important because all the ceiling joists roof rafters hips etc. Pitch can vary a great deal from a shallow slope up to a very steep pitch.

Plate level is the timber plate which is going to hold the roof structure including the roof joists hips and roof rafters. Pitch for a gable roof the most common is generally 1 4 or 1 3. Their length is determined by the length of the wall plate to the ridge. Eaves detail the eaves detail shows where the roof members and coverings.

The connections and general detail here should be provided by the design engineer. The wall while the horizontal strut loads cancel each other out if the roof is symmetrical. Colm flynn 2013 flat roof roof surfaces which are pitched at 10 degrees or less are classified as flat roofs. There are ridges eaves hips abutments and the centerline of the ridge.

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. Pitch is the slope or angle from the wall plate to the roof ridge line. These are nailed to a wall plate at the top of each supporting wall. There are two basic methods of pitched roof construction.

Pitched roof construction. The trusses are secured to the wall plate using galvanised steel truss clips. The extension part 7. Fixings used to connect the roof structure to the wall plate should be specified according to the roof construction and exposure of the site.

Pitch is nothing but slope of roof with the horizontal plane and is calculated as the ration of rise to. First of all there are many details to pitched roof types that can make construction more complex. 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. A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc.

Will all be fixed to them. And these are generally made of wood and are used to fix the common rafters. Wall plates should be bedded to line and level using nails or straps to hold them down in accordance with the design requirements. The vertical distance or height of top of ridge from wall plate is called as rise.

Wall plates are provided at top of wall or supports.