Roof Trusses


Trussed Rafters

Trussed Rafters

Trussed rafters are today’s preferred choice of roof construction for domestic buildings and are becoming increasingly favoured for commercial and industrial developments such as offices, retail, hotels and leisure centres. Attic rooms in residential developments are becoming increasingly popular to maximise plots, with some developers choosing to incorporate attic roof trusses as a precaution for future change of use.

This popularity is in part thanks to trussed rafters’ cost effectiveness and compatibility with a variety of construction methods including timber frame, masonry and steel frame. The use of timber in construction is an ideal environmental solution as the only truly renewable building resource.

Our roof trusses are CAD designed using Gang-Nail software. Strict design and fabrication standards ensure that our trussed rafters are consistently highly engineered to BS 5268: Part 3 and BS EN 14250.

Metal Web Joists

Metal Web Joists

The SpaceJoist open web joist system for floor and roof applications comprises of timber chords with steel “V” webs and timber vertical webs. Combining the best features of I-joists together with an open web construction, SpaceJoist delivers a quality product for maximum job site efficiency and overall cost effectiveness.

*These dimensions include a 3mm clearance. These dimensions are approximate as discrepancies may occur in manufacture.

Maximum Duct Opening Sizes (mm)

Metal Web Joists

Why choose SpaceJoists?...

Open web design
Fast and simple installation of services, without the need for drilling or notching.

Longer spans
Longer spans are achievable in comparison to solid timber. This may eliminate the need for intermediate load bearing internal walls, thus reducing a building’s overall cost.

Design flexibility
A number of end conditions are available to the designer, including top chord supported. SpaceJoists can be designed for precisely locating bearing walls and accommodating large services.

Reduced site wastage
Bespoke design eliminates the need for site alterations. SpaceJoist also saves timber resources by reducing the amount of waste timber generated during construction.

Wider spacing
Fewer joists are required to complete a floor installation, reducing labour time.

Light weight
The light weight construction allows the joists to be manoeuvred easily and safely on site, often without the need for specialist lifting equipment.

Wide nailing surface
Floor and ceiling application is simpler and quicker.

Save money
Trades work faster on site, reducing labour costs. The necessity for intermediate load bearing walls is also reduced.

SpaceJoist is manufactured off-site ensuring consistent quality and reliability. We are able to design SpaceJoist floors to a variety of specifications.

Metal Web Joists

Why choose JSI Timber Frame?

    Why choose JSI Timber Frame?
  • We have procedures in place, to ensure that from ordering, to completion of your timber frame, runs efficiently.
  • Qualified, competent, friendly staff with knowledge of our product, coupled with more than 10 years timber frame erecting experience.
  • We take pride in our product and service.

Mission Statement
We ensure that we will supply a quality product manufactured & installed accurately and efficiently.

Trussed Rafters

Alan Boswell
Kevin O’Neill

Caer Developments ordered from JSI Timber Frame Ltd the supply and fix of the timber frames for two semi detached dormer bungalows at our development in North Pembrokeshire. Their quote was accepted on 1st September 2008 as it met all our requirements and was 15% below the prices offered by several local competitors.

Clear timeframes were provided by JSI Timber Frame Ltd for the supply of the timber frame and were adhered to, with  Construction of the structure commencing on site in early October. What we particularly liked about JSI is that they arranged the whole package including delivery and unloading at site including the provision of the crane. Most of the other companies quoting required us to arrange crane hire even though erection of the Frames was included in their quotes.

The site team were excellent workers operating well with others on site and with the owners of the neighbouring properties. The service provide by Nathen Houston and his team was of the highest standard, at all times helpful and the finished product is of excellent quality and workmanship and the bill was exactly as quoted with no attempts to charge for any amendments that arose during the project.

Based on our experience with JSI Timber Frame Ltd we consider them to offer a highly professional service, quality timber frames with a good standard of workmanship, a complete work package at highly competitive prices.

C.A.T.G RegisteredTruss Mark Registeredtrussed Rafter Association