Steel Beams Supporting Cavity Wall, Trussed Rafter Roof and Flat Roof Extension
These structural calculations are based upon information provided by the client, should any variation between site conditions and the information provided by the client be identified, these calculations will be void.
Construction work not to be started until calculations have been approved by Building Control.
All construction work should be carried out by a competent builder.
The builder is responsible for all temporary supports and is to ensure that the structure is adequately supported during the works.
Steel beams are heavy components and may require mechanical lifting aids.
All weak or damaged masonry is to be re-built.
Existing foundations are assumed to be adequate, however, this is subject to exposing the existing foundations and an inspection for the satisfaction of the Building Control Officer.
Steel beam end bearings not to be located above lintels or openings.
Steel beam end bearings not to clash with or be located near the end bearings of existing beams or existing lintels.
Steel beam end bearing not to be inserted into a chimney or chimney breast.
Steel beam end bearing not to be located within 50mm of a flue.
Steel beam end bearings to be located on substantial load bearing masonry walls or piers. Plan area of bonded masonry supporting steel beam to be greater than or equal to 0.1m².
The minimum end bearing length at supports to be 100mm.
Supporting masonry to comply with Eurocode 6 or BS 5628.
Steel beams to be encased in fireline board to achieve 1/2 hour fire resistance in accordance with manufacturer’s recommendations.
No point loads or concentrated loads are to be applied to the steel beam.
The ends of every load bearing wall should be bonded or otherwise securely tied throughout the full height of the wall to a buttressing return wall, the return wall should not be less than 665mm long.
Walls exceeding 9m long should be provided with intermediate buttressing support (wall, pier, chimney). Intermediate buttressing walls should not be less than 550mm long.
Buttressing end return walls and intermediate buttressing supports should be provided in accordance with Approved Document ‘A’, which can be downloaded from the following website; www.planningportal.gov.uk.
CDM Regulations - Under the Construction (Design & Management) Regulations 2015 for commercial clients, the client duties apply in full. For Domestic clients, the client duties pass on to the Principal Contractor or Sole Contractor. For more information visit www.hse.gov.uk.