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DIY Building Supplies  |  SKU: JS-FAJT4715-4.2

6x2 Treated Timber C24 Regularised Sawn Joist 47x150mm - 4.2m

£11.52 Ex VAT
£13.82 Inc VAT
Shipping calculated at checkout.

Nationwide Delivery in 3-5 WORKING DAYS

  • Delivery: £35 ex VAT (only £25 with order value over £120 inc vat)
  • FREE DELIVERY OVER £500

Need a next-day or named day delivery? Call Us.


Our 6x2 C24 Timber Joists undergo a kiln-drying process to ensure optimal straightness and durability. Made with responsibly sourced, high-quality timber from FSC Certified forests, these joists are designed with smoothed edges for convenient handling. Sized at 47x150mm (with a finished size approximately 45x145mm), they are 4.2m long. 

  • FSC Certified
  • For use in timber framing, decking and roofing
  • Graded to C24 strength grade
  • Regularised for uniform size, with eased corners
  • Kiln Dried for additional strength and durability
  • Conforms to BS 4978 and EN 14081:2006

What is 6x2 Timber in mm?

While "6x2" in inches translates to 47x150mm in metric measurements, the specific dimensions of our 6x2 Timber in mm are slightly smaller due to the regularisation process. This process involves machining the length to ensure consistent width and thickness throughout, resulting in a size that is slightly reduced from the initial measurements.

Consequently, the "finished" size tends to be slightly smaller, usually around 45mm x 145mm rather than the initial 47x150mm measurements. This slight difference is typically insignificant in the majority of projects and is a common characteristic when using 6x2 regularised timber joists.

What are 6x2 Treated Timber Joists Used For?

6x2, C24 treated timber joists, are well-suited for a variety of applications, including roofing, flooring, house framing, and deck framing due to their particularly strong bend strength. Treated to resist moisture and pests, they are ideal for both indoor and outdoor projects, offering versatility and durability across a multitude of applications.

What is Regularised Timber?

Regularised timber undergoes mechanical finishing to achieve consistent and uniform dimensions along its entire length. This process ensures a smooth and even finish, resulting in a finished size slightly smaller by a few millimeters. Commonly used in structural components such as joists, studs, and framing materials, regularised timber ensures consistency, streamlining assembly processes and ensuring accurate fittings.

What Does Kiln Dried Mean?

Kiln-dried wood undergoes a process wherein the timber is placed inside a kiln to lower its moisture content to a specific level. Controlled heat and airflow within the kiln to expedite and standardise the drying process, effectively minimising problems like warping, cracking, and fungal growth in the wood.

What Lengths Do 6x2 C24 Timber Joists Come in?

Our6x2 Timber joists are available in 2.4m, 3m, 3.6m, 4.2m 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.

What Is C24 Timber?

C24 timber is a commonly used grade of timber in the UK. The "C" denotes the wood type (coniferous), while the number signifies its bend strength, with C24 possessing greater strength compared to C16.

Renowned for its robustness and ability to handle heavy loads, C24 timber is most commonly used for rigorous structural applications. It is frequently used construction projects that demand sturdy timber, especially for larger spans, heavy loads, or scenarios requiring exceptional structural resilience. C24 timber is often favoured for critical elements such as roof trusses, beams, and other essential structural components due to its emphasis on elevated strength and durability.

Do I Need Treated 6x2 Timber?

Our 6x2 Treated timber is versatile and well-suited for various purposes, particularly in projects prone to moisture or potential pest issues. Its treatment makes it suitable for both indoor and outdoor applications, demonstrating adaptability across a broad spectrum of projects.



Need Help? Call our Team on 0115 6976 800
  • Size
    47mm x 150mm
  • Finished Size
    approx 45mm x 145mm
  • Thickness
    47mm
  • Length
    4200mm
  • Width
    150mm
  • Material
    Treated Timber
  • Finish
    Treated to UC2
  • Strength Grading
    C24
  • Chain of Custody Scheme
    FSC

Do You Ship to My Address?

We deliver to most mainland UK addresses. If you are in one of the areas listed below and are unable to checkout, please give us a call to put together a custom quote.

Northern Ireland (BT), Isle of Wight (PO30-37), Isle of Man (IM), Scottish Highlands and Orkney Isles (PA, ML, EH, KA, G, KY, PH, DD, AB, IV, KW), Outer Hebrides and the Shetland Isles (HS, ZE) will incur additional charges and may also experience delivery delays.

How Much Will My Delivery Cost?

You can work out the cost of delivery on your order before checkout by heading to our Delivery Info page.

How Long Will Delivery Take?

We aim to deliver your items in 3 - 5 Working Days unless otherwise specified (eg - Sheds and Paving Kits). After you have placed your order, we will process your order and book a delivery day - which will then be sent to you via Email.

If have a specific request, please do give our team a call on 01156976800 and we will do our best to help.

What If I Need to Return Something?

If for any reason you wish to return your purchase, we will offer a refund or an exchange as long as this is requested within 14 days of receiving your order.

A manufacturer’s restocking charge may also apply on certain products such as non-stock items, which may be up to 30% of the purchase price, and you will be notified of this amount when you request a refund or exchange.

For full information visit our Returns Policy.

DIY Building Supplies

6x2 Treated Timber C24 Regularised Sawn Joist 47x150mm - 4.2m

£11.52 Ex VAT
£13.82 Inc VAT

Our 6x2 C24 Timber Joists undergo a kiln-drying process to ensure optimal straightness and durability. Made with responsibly sourced, high-quality timber from FSC Certified forests, these joists are designed with smoothed edges for convenient handling. Sized at 47x150mm (with a finished size approximately 45x145mm), they are 4.2m long. 

What is 6x2 Timber in mm?

While "6x2" in inches translates to 47x150mm in metric measurements, the specific dimensions of our 6x2 Timber in mm are slightly smaller due to the regularisation process. This process involves machining the length to ensure consistent width and thickness throughout, resulting in a size that is slightly reduced from the initial measurements.

Consequently, the "finished" size tends to be slightly smaller, usually around 45mm x 145mm rather than the initial 47x150mm measurements. This slight difference is typically insignificant in the majority of projects and is a common characteristic when using 6x2 regularised timber joists.

What are 6x2 Treated Timber Joists Used For?

6x2, C24 treated timber joists, are well-suited for a variety of applications, including roofing, flooring, house framing, and deck framing due to their particularly strong bend strength. Treated to resist moisture and pests, they are ideal for both indoor and outdoor projects, offering versatility and durability across a multitude of applications.

What is Regularised Timber?

Regularised timber undergoes mechanical finishing to achieve consistent and uniform dimensions along its entire length. This process ensures a smooth and even finish, resulting in a finished size slightly smaller by a few millimeters. Commonly used in structural components such as joists, studs, and framing materials, regularised timber ensures consistency, streamlining assembly processes and ensuring accurate fittings.

What Does Kiln Dried Mean?

Kiln-dried wood undergoes a process wherein the timber is placed inside a kiln to lower its moisture content to a specific level. Controlled heat and airflow within the kiln to expedite and standardise the drying process, effectively minimising problems like warping, cracking, and fungal growth in the wood.

What Lengths Do 6x2 C24 Timber Joists Come in?

Our6x2 Timber joists are available in 2.4m, 3m, 3.6m, 4.2m 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.

What Is C24 Timber?

C24 timber is a commonly used grade of timber in the UK. The "C" denotes the wood type (coniferous), while the number signifies its bend strength, with C24 possessing greater strength compared to C16.

Renowned for its robustness and ability to handle heavy loads, C24 timber is most commonly used for rigorous structural applications. It is frequently used construction projects that demand sturdy timber, especially for larger spans, heavy loads, or scenarios requiring exceptional structural resilience. C24 timber is often favoured for critical elements such as roof trusses, beams, and other essential structural components due to its emphasis on elevated strength and durability.

Do I Need Treated 6x2 Timber?

Our 6x2 Treated timber is versatile and well-suited for various purposes, particularly in projects prone to moisture or potential pest issues. Its treatment makes it suitable for both indoor and outdoor applications, demonstrating adaptability across a broad spectrum of projects.



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