• a posi-joist with a white background
  • posi joists installed and ready for a floor covering
  • close up of a posi-joist
  • a building without a roof taken from above
  • posi-joists stacked up in front of a loaded lorry
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Posi-Joist: 225mm Depth

Posi-Joist: 225mm Depth

£27.58
£27.58
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What's included?

All strongback bracing timber is included in the price. If you need restraint straps, please add these separately here.

Disclaimer

Please note, maximum span refers to the total length of the joist including bearings. Posi-Joists ordered here are intended for domestic floors only or flat roofs with a build up weight not exceeding 100kg per m2. They should be spaced at no more than the centres specified, and should not be used as beams or trimmers supporting other elements. For all other requirements, please contact us for a full design and quotation.

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  • Place your order

  • We'll contact you to confirm your requirements

  • Then deliver on a day that suits you

Posi-Joists, also known as metal web joists or engineered joists, offer the perfect combination of timber’s lightness and steel’s strength, creating a versatile floor and roof truss system that spans much longer distances compared to other timber options. Their open-web structure makes it simple to route services like plumbing and electrics without needing alterations.

How Far Will Posi-Joists Span?

FAQs

Does the span include bearings?

Yes, if your joists are sitting on your bearings, please include these in your span measurement.

How does ordering work?

After you've placed your order, we'll give you a ring to confirm your measurements, delivery location, delivery dates/times and any other essential pieces of information before we begin manufacturing your products. This gives you some time to let us know if anything needs changing before it's too late. Once you're fully happy and have given us the go-ahead, we'll begin manufacturing your joists ready to be delivered for your specified date.

Can I supply more measurements?

Yes—either use the 'order special instructions' box in the basket or send us an email with any specific requirements you may have along with your name and/or order number.

What are your delivery options?

We can deliver trusses, joists or glulam in 5-10 working days. The price is a flat fee of £50 + £2 per mile. The maximum we will charge you is £150. We will ring you after you've placed your order to confirm which day you'd like us to deliver on using our own fleet of vehicles.

For metalwork, it'll be delivered in 1-3 working days using a courier service and costs £20. If spending more than £150 on metalwork, delivery is free.

Is bracing timber included?

Yes—all strongback bracing timber is included in the price above.

Do I need a structural engineer?

No, you don't need a structural engineer. We will design the roof truss and provide you with the necessary structural calculations for building control.

Are Posi-Joists treated?

99% of the time Posi-Joists are not treated. Treatment is only necessary if you live in the red marked areas on this map. If you do require treatment, please get in touch.