Joistz

SpaceJoists

Under the licence of ITW Gang-nail, Joistz are able to design, supply and install CE marked, PEFC certified Metal Web Open Floor SpaceJoists.

We design and manufacture for all types of building, a joist with a superior span, that doesn’t shrink and allows services to pass freely within the web.

Joistz for Steel Frames - We are able to use SpaceJoists for the structural timber floors within multi-storey, steel framed buildings. Using joists with steel frames is a quicker, more sustainable and cost effective process of build. They can be Top Chord Support or Bottom Chord Support.

Joistz for Timber Frames - We can supply SpaceJoists for standard timber frame. These can be top hung or can be fitted to a rim board or ring beam to satisfy the requirements of disproportionate collapse.

Benefits

  • Easy access for installation of services.
  • Metal webs allow longer spans and reduced costs.
  • Reduced timber content which means fewer squeaks in the future.
  • More flexibility with how the joists are supported due to the variety of end details available. Easier Part E compliance.
  • All SpaceJoists are manufactured off site as bespoke designs meaning they are of consistent quality and reliability.
  • Lightweight construction makes SpaceJoists easy to handle on site without the need for crane hire.

SpaceRafters

SpaceRafters are a more efficient way of forming an attic space through using off-site construction. We can provide Loose SpaceRafters or Cassette SpaceRafters which would enable a speedier installation time on site.

SpaceRafters are constructed with plated blocks which allows for the support to be sunk into the joist minimising down stand.

The below table shows the spans we can achieve with SpaceRafters. This table is indicative and only to be used as an estimating tool. The spans are calculated using typical roof loading when using TR26 timber.

Web TypeDepth (mm)Centres (mm)Width (mm)Flat Roof Span (<5∞)Pitched Roof Span (45∞)
SJ9219mm60047 x 72
47 x 97
47 x 122
47 x 72
5150
5650
6100
4500
4950
5350
SJ10254mm60047 x 72
47 x 97
47 x 122
5900
6500
7000
5100
5650
6050
SJ12304mm60047 x 72
47 x 97
47 x 122
6650
7300
7850
5800
6400
6900
TW14375mm60047 x 72
47 x 97
47 x 122
7800
8550
9150
6750
7500
8050
TW16425mm60047 x 72
47 x 97
47 x 122
8550
9350
10050
7350
8050
8800

Roof Trusses

Roof Trusses are the most popular form of roof framing within the UK. They provide a flexible, quick installation at a lower cost.

Depending on the specific requirements of the customer’s project, we have a team of experienced, professional designers who can decide the best solution for your roof framing based on the range of Roof Truss configurations available. The variation of roofing arrangements possible with truss rafters is unlimited. Our trusses are produced with precise manufacturing which enables them to be delivered to site and erected immediately.

Our trusses are designed in accordance to the current codes of practice, which is BS 6399-1, BS EN 1991-1-1 and EC5. The timber which we use is kiln dried and stress graded which complies with the current European and British standards.

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