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Twitter12 Aug The STA will be exhibiting at this year’s @ExploreOffsite Expo held at Coventry Building Society Arena on stand F10… Aug In the latest guest blog for Time for Timber, Head of Education and Engagement at Timber Development UK, Tabitha Bi… Aug The STA are proud to be a headline sponsor for this year’s @STAwards22 The awards ceremony will take place on 12th… Aug This month Time for Timber interviewed Stewart Dalgarno, Director of Innovation and Sustainability at the Stewart M…

Floor Systems

The use of timber floors has been around for centuries and the performance is dependent on the use of the floor. Timber floor structures are engineered, designed and built to achieve structural compliance as well as acoustic, fire and in some instances, thermal performance. For most floor designs and installations it is the serviceability checks that dictate the spacing and size of floor joists or the depth of solid floors. It should be noted that where the finish of the ceiling is exposed timber, such as cross laminated timber, the structural capacity will include a fire resistance check which may dictate the finished depth of floor required. Timber floors are no more sensitive to different loading types than other materials.

Floor Panels and Cassettes

Floor panels and cassettes are modular floor systems, which can be manufactured using I-Joists, open web joists or traditional joists to meet customer requirements. They are pre-decked and manufactured offsite, providing an easy-to-fit, low maintenance flooring option, with the instant stability of a working platform.

Cross laminated timber
A structural two-way spanning solid wood panel product that can be used to form floors as well as roofs and shear walls. It is produced by stacking a number of layers of timber, known as lamellas, at 90º to the layer below and subsequently glued to create panels of up to 24m in length and 2,950mm in width, which can encompass between three and seven layers.

To find out more about cross laminated timber, click here


Structurally engineered timber joists, combining high-grade softwood with an engineered composite panel. I-Joists are lightweight, easy to install and have an excellent strength to weight ratio. The most notable difference from dimensional lumber is that the I-joists carries heavy loads with less lumber than a dimensional solid wood joist. The advantage of I-joists is they are less likely to bow, crown, twist, cup, check or split as would a dimensional piece of lumber. I-joists' dimensional soundness and little or no shrinkage help eliminate squeaky floors.

Open Web Joists

Composite timber and steel joists, forming an open web design which are also known as Posi Joists. They are lightweight, strong, easy to install and available in long lengths. Open web joists provide the lightness of timber with the strength of a steel web. The open web design means that using these joists can eliminate cutting and drilling when installing services.

To find a member that specialises in Floor Systems, click here