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I Beams Timber Joists

I Beams or I Joists are well known in the Offsite MMC Timber Frame Industry and are used in joists for floor systems, roof structures and also walls . They generally have a top and bottom timber or LVL chord and a central board of OSB/Plywood or hardboard.

Advantages: they are light and easy to use, extremely stable and can be made to handle longer spans than equivalent sized solid timber joists. They can be made from finger jointed timber allowing up to 12M production runs which can be cut to size to specific projects.

I Beams – Lightweight alternative to Steel, Concrete, and Solid. Extended Spans and easy to use. All supplied to Certified systems and accredited Design criteria.  


Thicknesses: 220,225, 240,300mm

Widths: 47, 60, 70, 97mm

Lengths: up to 12M (Max 18M)


Floors, Roofs or Walls can be designed to specific requirements.

Other Sizes on Application

Submit Drawings to receive Free Quote (subject order)

Available for Shipping, Imported in FULL LORRY LOADS/CONTAINERS from European and North America by LORRY LOAD QUANTITIES from UK stockists.


Lightweight and dimensionally stable

Service: design, take offs, extensive technical brochures

Superior strength and easy installation of services

Reduces thermal bridging

Easy cutting with hand or machine tools

Solid timber or Kerto LVL flanges – dried, machine stress graded and finger jointed

Webs from high grade natural fibreboard or OSB/Plywood

PEFC Certified

Environmentally friendly