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3x2 Timber (47X75mm) C16 Graded Tanalised Treated

Timber Joists C16 & C24 Grade

At Armstrong Cheshire, we offer high-quality, regularised timber for both DIY and professional use, available in both C16 and C24 grades. These versatile timber joists are ideal for outdoor decking, roof rafters, and structural applications. Sizes range from 4x2 (47mm x 100mm) to 9x3 (75mm x 225mm).

What is C16 & C24 Timber?

C16 and C24 are both kiln-dried for strength and durability. C24, with tighter growth rings, offers superior performance compared to C16, making it ideal for heavier loads and wider spans.

  • C16: Suitable for lighter applications, offering good strength for general use.

  • C24: Superior strength and durability, perfect for structural applications like decking, ceiling joists, and roof rafters.

Popular Uses:

  • Ceiling Joists

  • Roof Rafters

  • Deck Joists

  • Floor Joists

  • Web Joists

  • Timber Framing

Environmental Considerations

We offer responsibly sourced timber from sustainably managed forests, with both treated and untreated options available.

Size & Finishing

Our timber is machined to ensure consistent section sizes. For example, a 47 x 150mm (6x2) timber joist will finish at 45 x 145mm.

Why Choose C24 Over C16?

C24 timber provides higher load-carrying capacity and strength compared to C16, making it ideal for larger projects. However, for less demanding applications, C16 may be sufficient. The choice between C16 and C24 depends on your project's performance requirements.

Associated products

We are able to provide a complete range of materials to complete your project. For example, if you're using joists for a flat roof, we supply Furring Strips to give the slight slope that would be needed. 

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