On a flat roof yes it is more so but on a pitched roof it would try and push the plate off the wall.
Timber wall plate flat roof.
And a timber fixed to the face of a wall is called what.
Timber packing plates are installed over walls between the top chords of top chord supported open web joists.
In the uk the term typically refers to a length of timber bedded on mortar on top of the internal leaf of an external cavity wall.
Sip roof construction to check 66.
When the roofing carpenter builds in the roof he will wrap the ties around the rafter and nail them to the roof timbers.
The sheets of plywood are fixed to the flat roof joists to make a flat base hence the name flat roof.
Profiled timber wallplates or headbinders if required are fixed into the sip wall panels and onto purlins in accordance with the fixing schedule to resist uplift.
Wall plates should be.
Fix the new joists to the ledger with appropriate timber to timber joist hangers.
If your plate and ledger are straight and level the you will have a nice flat ceiling.
To improve strength timber noggins are sometimes used between the joists.
Normally i would set the joists out at 400mm on center for the ceiling plasterboard and set them in 50mm from the inside wall.
The weight of the roof will be carried by the timber wall plate that rests on the internal skin and the roof structure will be supported by the external walls or skin of the house.
The panels are laid with the longer edges across the flat roof joists and staggered to offer a more stable surface.
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.
This provides a fixing point for the feet of rafters and distributes the load exerted by the roof structure down through the walls without creating pressure points where each rafter meets the wall and also acts to prevent wind uplift.
Trussed rafters should only be supported at the junction between the ceiling tie and rafter unless specifically designed otherwise e g.
Ensure the top of the brickwork is as flat as possible and the wall plates can sit down tight onto it.
For square or rectangle buildings cutting opposing plates the same length will help keep things square.
Bedded to line and level.
Guidelines for anchoring roof trusses.
On the front wall i know i need to fit a 4 x 2 wooden wall plate but do i need to fit wooden wall plates on the side walls.
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.
Fixing joists to an existing wall.
The roof joists 175mm x 63mm will fix to the back wall of my house on joist hangers and then the other end will fit to the front wall of my extension.
First work your way along the brickwork and clear any snots off lumps of much the bricklayer has left.
Is there an alternative method to fix a wall plate to a facing brick wall rather than use metal strapping.
