• a fink truss with a white background

    Fink

    Simple, quick and cost-effective, the fink truss is a staple choice for simpler builds or ones working to a budget.

  • an attic truss with a white background

    Attic

    Utilising what would otherwise be wasted space, the humble attic truss is our favourite option for almost every project.

  • a raised-tie truss with a white background

    Raised Tie

    Popular in garages and upper floors, the raised tie adds a touch of interest to any room with the practical benefit of some extra headroom.

  • Scissor

    Costing roughly the same as a fink truss yet adding bags of character thanks to its vaulted ceiling, the scissor truss is an underrated option.

  • animated monopitch truss

    Mono

    Ideal for sheds, extensions, garages or simply as an element within your overall design in combination with other truss types.

Free Guidance

If you're in the initial stages of design, reach out to us and one of our experienced designers can provide expert guidance on the feasibility of incorporating a trussed roof into your project. As an example of what can be done, have a look at one of our recent projects below.

Explore one of our designs ⤵

  • The World of Roof Technology

    This comprehensive guide to trussed rafters includes and roof truss framing includes information for specifiers, technical information on trusses and information for safe handling of trusses on site.

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  • Guide to Attic Trusses

    The ‘Room-in-Roof’ (‘RiR’) or attic truss is a simple means of providing the structural roof and floor in the same component.

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  • Strength properties of TR26

    The characteristic strength properties of TR26 timber.

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The benefits of Posi-Joists

  • Strength 💪

    Thanks to the clever combination of timber and steel in their design, Posi-Joists can span greater distances than solid timber, reducing or even eliminating the need for load-bearing walls or steel beams.

  • Service Routing 🚽

    Thanks to their open-web structure, Posi-Joists can accommodate various services without modification. With MVHR becoming all the more common, this is a huge benefit to both installer and customer.

  • Ease of installation 🔨

    Posi-Joists are manufactured to the size of the building and can be simply dropped into place. If the building isn't perfectly straight, Posi-Joists can be supplied with trimmable ends.

  • Weight 🏋️‍♂️

    Posi-Joists use less material to achieve the same strength as solid timber, making them significantly lighter and easier to handle.

  • Quality ✏️

    Posi-Joists are designed in specialist software and produced under factory-controlled conditions, ensuring an unmatched level of quality every time.

Posi-Joist Span Table

  • The World of Posi Technology

    This comprehensive guide to all things Posi includes standard details for masonry and timber frame construction, installation guidance, information on acoustic and fire performance and much more.

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  • Posi-Joist Brochure

    This brochure provides a general overview of the product outlining the many advantages of specifying Posi-Joist.

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  • Posi-Joist Acoustic Test Report

    Full acoustic test report for different Posi-Joist floor makeups detailing Posi-Joist’s different acoustic performances in different situations.

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  • Posi-Joist Standard Details

    A comprehensive set of Posi-Joist standard details including masonry and timber frame details.

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  • Posi-Joist Installation Guide

    A pictorial guide to best installation practice, including detailed written installation instructions and useful Do’s and Don’ts

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  • Benefits of Posi-Joists

    Constructed of kiln dried stress graded timber and plated together with high strength steel webs, metal web floor systems have a number of benefits compared with other floor and joist systems.

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  • Posi-Joist Fire Summary

    This document details the extensive programme of fire tests that MiTek has undertaken in order to provide a range of compliant floor build ups for 30, 60 and 90 minutes fire resistance to EN Standards.

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