As the mortar does not bond the wall plate to the wall steel straps are used to ensure that the roof structure remains secure.
Flat roof wall plate fixing.
If the wall plate of the flat roof is level with the wall plate of the existing house can you make the two wall plates the same height then you will need to strip off some roof tiles and run the new joists through butting and fixing them up to either the roof rafter or the ceiling joist on top of the house wall plate.
And attaching the wall plate for it theme.
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 cavity closer should be provided to the top of the walls to prevent fire spread and to stop damp air entering the roof space.
Generally wall plates are in lengths of not less than 3 m.
To fix the joists and rafters down on to the wall plates they should be toe or skew nailed to the top plate like below.
Hi guys just need some advice on fixing my wall plate to an old granite wall.
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Where a new flat roof abuts an existing external wall the joists can be hung on metal joist hangers which are fixed to a horizontal timber plate wall bolted to the wall.
Fixing joists to an existing wall.
Creating a fall on a flat roof.
These are typically 1 2 m long with a cranked end and are fixed to the wall plate at 2 m centres.
The roofs size is 2 8mx1 6m.
The roof only hits.
By way of metal flat roof joist hangers.
The plate straps at least should be in your spec also yes to the half laps.
Also for your wall plates fix them down about every 500mm with concrete screws and then every 1500 with plate straps.
Fixings used to connect the roof structure to the wall plate should be specified according to the roof construction and exposure of the site.
