7x2 Treated Timber C24 Regularised Sawn 47x175mm - 4.8m

In metric measurements, the dimensions of 7x2 timber translate to 47x150mm. However, the actual millimetre size of 7x2 timber is slightly reduced due to the regularisation process our structural timber undergoes. This process involves machining the length of the timber to ensure smooth and consistent dimensions throughout.

Consequently, the "finished" size may be slightly smaller than 47x175mm, usually closer to 45mm x 170mm. This slight difference does not impact the large majority of projects and is a standard feature of using 7x2 regularised timber joists.

7x2 timber joists can be used in various construction projects, particularly floor joists or in structural projects where the timber is graded to C16 or C24 strength grading. Treated timber is suitable for both internal and external projects.

Our timber joists are often referred to as “regularised” - meaning the lengths of timber are machine-finished to achieve a smooth finish and a uniform dimensions along the length of the timber joist. This can impact the finished size of the product by a few millimetres. The most common types of regularised timber joists are C16 and C24.

Kiln-dried refers to a process where timber or wood is placed inside a kiln to remove excess moisture from it. The controlled heat and airflow in the kiln facilitate faster and more uniform drying compared to air-drying methods. This process reduces the moisture content of the wood, making it lighter, stronger, less prone to warping or cracking, and more stable for various applications in construction, woodworking, or furniture making.

Our 7x2 Timber joists are available in 2.4m, 3m, 3.6m, and 4.8m. We try to keep all of these lengths in stock wherever possible, but on occasions where stock levels or availability in your area is low, we may substitute for a longer length.

UK regularised timber is commonly categorised into two grades: C16 or C24. The "C" specifies the wood type: Conifer. The numerical value denotes the bend strength (determined by factors like imperfections and knots) C24 is the stronger grade of the two.

Typically, C16 timber joists are used in wall and roofing applications, while C24 is favoured for situations requiring exceptional strength, notably in roofing and flooring joists.