Loft Conversion Steel Floor Joists

There are many ways of altering roof structures for loft conversions but they all have one common element the ceiling joists will almost certainly be inadequate as floor joists.

Loft conversion steel floor joists.

Most loft conversions employ at least one pair of steel beams to support the new floor structure and the roof slopes at purlin level and sometimes also at ridge level e g. To overcome this problem new floor joists would need to be installed to take these new loads. The new floor joists of your loft conversion will need to offer at least 30 minutes worth of fire protection which could mean replastering the ceilings in those first floor rooms below. Ceiling joists are tied to the floor joists with steel straps to stabilise the ceiling.

Floor joist span tables for surveyors floor construction. Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors. Telebeam is a totally pre fabricated entirely bespoke and adaptable loft conversion system for a wide range of roof spans and pitches. This is part 2 in my series of loft conversion videos.

New floor joists are measured and trimmed to size then dropped into the joist hangers and secured in position. Bungalows houses detached semi or terrace barns or garages. Where you re adding a large dormer. Ceiling joists for non habitable loft floors c16 strength grade timber.

When you re carrying out your planned loft conversion it s highly likely you ll find that the existing ceiling joists or gang nailed roof truss chords in your property are not designed to carry a full domestic floor load. It is unlikely that the existing ceiling joists will be adequate to support the weight loads that arise from the construction contents and use of a typical habitable room developed in a loft. The loft room will also have to be separated by a fire door either at the top or bottom of the new stairs. However manoeuvring long heavy steels into place at high level can be enormously difficult necessitating the use.

Timber loft floor joist calculations trimming joists. This means that new floor joists are fitted alongside them slightly raised above the ceiling plasterboard to avoid contact with it.