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7x3 Timber

Our heavy-duty 7x3 timber is designed for demanding structural applications, including load-bearing walls, roof joists and large-scale framing, for reliable performance in indoor and outdoor builds where strength is key.

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    C16 Timber Joists Untreated Kiln Dried Regularised FSC 75 x 175mm (7x3)

    C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher...
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    C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 75 x 175mm (7x3)

    These C16 carcassing timber lengths are UC3u treated timber, meaning they perfect for outdoor use providing it is above ground. Carcassing is a generic trade term which refers to the use of a species of timber. Spruce/Pine and Fir are used to form...

Our 7x3 timber is pressure treated and suitable for indoor and outdoor use for joists, rafters and load-bearing frames. With excellent strength and stability, this timber size is ideal for both professional construction and robust DIY projects.

Why choose 7x3 timber?

Heavy-duty 7x3 timber is designed for situations where extra width and strength are required. Common uses include:

  • Roof joists and rafters
  • Load-bearing walls
  • Large-scale frames
  • Structural applications

    • What is 7x3 timber in mm?

    7x3 timber is approximately 75mm x 175mm.

    Sizes and options

    We stock 7x3 timber in a variety of lengths to suit your project needs. It's also available in both C24 and C16 grades.

    Shop our full range for reliable, long-lasting construction materials. Strong, stable and versatile – perfect for any structural project.