UK’s leading producer of Posi-Joist, metal web joists

What is a Posi-Joist?

Posi-Joist, metal web joists are a hybrid structural building material, designed for use in both flooring and roofing applications, that combines timber chords with steel webbing.

Each joist features a top and bottom chord, steel webs, and end supports. Unlike traditional solid timber joists, Posi-Joist are engineered using specialist MiTek software and manufactured across our Crendon Timber Engineering manufacturing facilities.

With the flexible design, Posi-Joist, metal web joists enable adjustments to load capacities, specific configurations and placements before production begins.

Also known as Eco Joist, Metal Web Joists and Easi-Joist, each one of these have the same benefits, the steel webbing is where the metal web joists originates from.

What are the benefits of Posi-Joist?

Posi-Joist, metal web joists combine the lightness of timber with the strength of steel, they’re easy to install and span greater distances than timber alternatives to allow unequalled design freedom.

They offer exceptional floor performance from a minimum 72mm wide fixing surface, and the unique open web design makes it easier for plumbers and electricians to install services with no drilling, notching or cutting needed – helping reduce time and costs. 

Why Choose Posi-Joist?

There are many reasons to choose Posi-Joist, metal web joists in your build, here are six good reasons to consider.

Longer Span

They offer much longer spans than conventional solid timber joists, all while being lighter in weight. This makes them an ideal choice for contemporary construction techniques that favour open-plan living. With their extended span capabilities, they often remove the need for internal load-bearing walls or central supports, enabling more versatile and spacious floor plans.

Easy Routing For Other Trades

The open web configuration of Posi-Joist makes them perfect for accommodating plumbing, electrical wiring, and ventilation systems. There’s no need for time-consuming drilling or notching, which speeds up installation and helps maintain the structural integrity of the joist. Whether it’s a new build or a renovation, they deliver an efficient and budget-friendly option for routing essential services.

Lightweight

By using less material while maintaining strength, they are considerably lighter than solid timber joists. This is especially advantageous on sites with limited access for cranes or when you want to avoid additional lifting equipment and costs.

Simple Installation

Custom designed and manufactured to suit your building’s dimensions, they are straightforward to position during installation. They can also be supplied with trimmable ends, offering flexibility for irregular or older structures where perfect straightness is rare.

High Quality

Each Posi-Joist is designed using advanced MiTek software and manufactured under strict factory conditions. This ensures consistently high quality and precision with every unit.

Zero Shrinkage

Unlike traditional timber, they resist shrinkage and warping, two of the most common causes of squeaky floors, ensuring long-term performance and comfort.