The extension part 7.
Pitched roof wall plate detail.
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.
Eaves detail the eaves detail shows where the roof members and coverings.
Pitch is the slope or angle from the wall plate to the roof ridge line.
Getting the wall plates or top plates as they are sometimes called right is important because all the ceiling joists roof rafters hips etc.
Will all be fixed to them.
The vertical distance or height of top of ridge from wall plate is called as rise.
First of all there are many details to pitched roof types that can make construction more complex.
Refer to the details.
Line up wall plate against existing joists and make a mark on the wall plate in line with the centre of the joists.
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.
Wall plates are provided at top of wall or supports.
Their length is determined by the length of the wall plate to the ridge.
The bracing is placed length ways and also diagonally across the trusses.
Pitch for a gable roof the most common is generally 1 4 or 1 3.
Setting out the roof wall plates the extension project is now up to plate level so it s time for pythagoras theorem.
Drill holes at these marks to allow a 6 nail to be driven through the wall plate into the joists.
Pitch is nothing but slope of roof with the horizontal plane and is calculated as the ration of rise to.
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.
Pitch can vary a great deal from a shallow slope up to a very steep pitch.
The trusses are secured to the wall plate using galvanised steel truss clips.
Wall plates should be bedded to line and level using nails or straps to hold them down in accordance with the design requirements.
I show how i construct it showning in detail how to do the lead flashing.
Which is equal to 1 4 or 1 3 the total span of the building not counting any overhang.
And these are generally made of wood and are used to fix the common rafters.
Plate level is the timber plate which is going to hold the roof structure including the roof joists hips and roof rafters.
This wall plate will sit on the first skin brick work.
In order for all the roof components to work they must be square parallel level and fixed down properly.
Include roof pitch roof geometry slope length and climatic factors such as heavy snowfall or rainfall.
