Fixing Flat Roof Joists To Wall Plate

I m having an extension built and would like to know how to properly and safely fix for example anchor bolts what size etc a wall plate to an external masonry wall so that the joist will hold a 102kg rooflight.

Fixing flat roof joists to wall plate.

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. The best way to repair the end of a joist is to remove the damp or affected end after the floor or ceiling has been propped up as one would if removing or forming an opening through a load bearing wall with acrow props. Fixing a wall plate hi. 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.

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. 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. Create timber frame structures with toolstation s range of nail plates including galvanised nail plates and safe metal fixing plates. Stainless steel brackets stainless steel fixings steel strapping heavy duty joist hangers and square plate washers.

How to position fix and align joist plates. Otherwise setting roof trusses onto wall plates can be done by the average do it yourselfer usually in one to two days depending on the size and scope of the project. Joist repair plates fixed to timbers. Fixing joists to an existing wall.

Set out the ceiling joists onto the wall plates the ceiling joists are installed before the rafters as they will stop the roof spreading and also give something for you to lay planks across to stand on when building the roof. Fixing roof trusses to a wall plate requires a small amount of carpentry knowledge such as the abilities to read a tape measure and operate a framing square. A new piece of timber is cut a to replace the damaged piece and the joists plates are.