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.

Refer to the details. This is part two of the porch build where i am doing the roof. Pitch for a gable roof the most common is generally 1 4 or 1 3. Which is equal to 1 4 or 1 3 the total span of the building not counting any overhang.

There are ridges eaves hips abutments and the centerline of the ridge. The trusses are secured to the wall plate using galvanised steel truss clips. Pitch is the slope or angle from the wall plate to the roof ridge line. Wall plates are provided at top of wall or supports.

And these are generally made of wood and are used to fix the common rafters. They are cut to the same length as the brickwork they sit on a half lap joint is great for the corners to be fixed to. In order for all the roof components to work they must be square parallel level and fixed down properly. Setting out the roof wall plates the extension project is now up to plate level so it s time for pythagoras theorem.

Eaves detail the eaves detail shows where the roof members and coverings. Their length is determined by the length of the wall plate to the ridge. I show how i construct it showning in detail how to do the lead flashing. The bracing is placed length ways and also diagonally across the trusses.

This wall plate will sit on the first skin brick work. 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. Line up wall plate against existing joists and make a mark on the wall plate in line with the centre of the joists. Getting the wall plates or top plates as they are sometimes called right is important because all the ceiling joists roof rafters hips etc.

Include roof pitch roof geometry slope length and climatic factors such as heavy snowfall or rainfall. 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. These are nailed to a wall plate at the top of each supporting wall.

Colm flynn 2013 flat roof roof surfaces which are pitched at 10 degrees or less are classified as flat roofs. Pitch is nothing but slope of roof with the horizontal plane and is calculated as the ration of rise to. Whenever possible begin trim installation at the downwind end of the roof farthest away from the source of prevailing winds to al low flashing laps to face away from wind driven rain. Drill holes at these marks to allow a 6 nail to be driven through the wall plate into the joists.

Pitch can vary a great deal from a shallow slope up to a very steep pitch.