Hi I have a single storey extension going in with a 4m long bifold to the garden, it is likely that due to this span we would be installing this steel with welded plate as you’ve shown in your detail drawing. My question is: Where this steel is supported at either side of the bifold, will the padstone simply be on the inner leaf? As the welded late is there to support the outer leaf of bricks and is not relying on the external bricks below as a load wall? hope anyone can understand and give me advice. Heres a sketch I’ve done if it helps, it’s a detail of the steel at the supporting wall at either side of the bifold.