At present I have a set of 2400 x 2350 aluminium sliding doors which are to be replaced with a set of timber 2400 x 2090 bifold doors.
Due to the height difference I can not fix to the existing beam above so I was intending to bridge the gap needed by fixing a 2400mm timber to the bulkhead above (hopefully steel beam) and construct a new wooden beam to act as a new bulkhead for the new doors from 2 x 75 x 35 c 16 pressure treated timbers, bolted together to make 1 x 70 x 150 beam fixed via joist hangers to 2 plates of wood 300 x 600 x 35 fixed via 4 x 110mm masonary screws (to each plate). The left over space between the new bulk head and new beam I intended to add supports every 600mm running vertical, fixed via ties.
My concerns are whether the above would be adequate to support the doors when fully open. The bifold doors would be fixed accordingly to the blockwork side walls and floor, however will the new bulk head be suffice? The joist hangers support 1.1kn short uplift 3.2 km long term (each I presume) while the doors weigh 101kilos. If my calcs are correct the load should be fine however when the doors are fully open will the load hang down or pull out??? The doors are top hung will a timber joist be strong enough for the job? In theory I am fixing a 220mm timber to the side walls and bulkhead (steel or catnic beam).
Due to the height difference I can not fix to the existing beam above so I was intending to bridge the gap needed by fixing a 2400mm timber to the bulkhead above (hopefully steel beam) and construct a new wooden beam to act as a new bulkhead for the new doors from 2 x 75 x 35 c 16 pressure treated timbers, bolted together to make 1 x 70 x 150 beam fixed via joist hangers to 2 plates of wood 300 x 600 x 35 fixed via 4 x 110mm masonary screws (to each plate). The left over space between the new bulk head and new beam I intended to add supports every 600mm running vertical, fixed via ties.
My concerns are whether the above would be adequate to support the doors when fully open. The bifold doors would be fixed accordingly to the blockwork side walls and floor, however will the new bulk head be suffice? The joist hangers support 1.1kn short uplift 3.2 km long term (each I presume) while the doors weigh 101kilos. If my calcs are correct the load should be fine however when the doors are fully open will the load hang down or pull out??? The doors are top hung will a timber joist be strong enough for the job? In theory I am fixing a 220mm timber to the side walls and bulkhead (steel or catnic beam).
