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DIY Building Supplies  |  SKU: JS-FBJT4775-3.6

3x2 Treated Timber C16 Kiln Dried Regularised Joist 47x75mm - 3.6m


£5.26 Ex VAT
£6.31 Inc VAT
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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 3x2 Timber is quality, FSC certified timber, graded to a C16 standard and treated to resist moisture and pests. Measuring 47x75mm (finished size approx 45mm x 70mm) and spanning 3.6m in length, this timber undergoes kiln-drying and regularisation, ensuring a resilient yet lightweight structure suitable for a multitude of applications.

  • Conforms to BS 4978 and EN 14081:2006
  • Regularised with eased corners
  • Suitable for partitioning and constructional applications
  • FSC Certified Timber
  • Kiln Dried for additional strength and durability

What is 3x2 Treated Timber in mm?

"3x2" relates to the joist size in inches which equates to 47 x 75mm. However, our 3x2  timber joists are regularised to ensure a smooth and consistent size along the entire length of the timber, which means the "finished" size is slightly smaller, approximately 45mm x 70mm.

This small size difference in the majority of projects will make no material difference, and is typical across 47x75mm (3x2) timber joists.

What are 3x2 C16 Treated Timber Joists Used For?

Often utilised in stud walling and partitioning, C16 timber boasts exceptional strength, making it well-suited for interior construction tasks. While it's not recommended for supporting the building's structure, its treatment extends its suitability to various outdoor applications like decking, fencing, sheds, pergolas, and various other outdoor structures.

What Does Kiln Dried Mean?

Kiln-dried timber is a popular choice for construction due to its numerous advantages over air-dried wood. The controlled environment within a kiln enables quicker and more uniform drying, minimising the typical risks of warping, cracking, and other imperfections often found in air-dried methods. This consistent moisture content significantly improves wood stability and strength.

What Lengths Does 3x2 C16 Timber Joist Come in?

We offer 3x2 timber in various lengths: 2.4m, 3m, 3.6m, 4.2m, and 4.8m. Although we strive to maintain stock across all sizes for efficient delivery, there might be intermittent delays or shortages in certain lengths. Should this occur, we may substitute longer lengths to ensure your order arrives promptly.

What Does C16 Stand For?

Timber is graded based on strength and quality, with C16 and C24 being among the most common grades in the UK. These grades indicate how well the timber can handle loads, particularly under bending stress.

C16 and C24 are primarily used in construction for structural purposes but serve different needs. C24 is ideal for tasks needing greater load-bearing capacity, like expansive spans or heavier loads.

However C16, while slightly less robust than C24, remains sturdy and widely used in wall and roofing applications with less stringent load requirements. Both grades offer reliability, but the choice between them depends on the specific structural demands of the project.

Do I Need Treated 3x2 Timber Joists?

Our 3x2 Treated Timber is suitable for both internal and external use. However, if your project might face moisture or pest challenges, treated timber is particularly suited to outdoor projects such as decking, roofing, and similar applications due to its enhanced resistance to moisture and pests.



  • Size
    3x2
  • Finished Size
    approx 45mm x 70mm
  • Thickness
    47mm
  • Length
    3.6m
  • Width
    75mm
  • Material
    Treated Timber
  • Finish
    Treated to UC2
  • Strength Grading
    C16
  • Chain of Custody Scheme
    FSC
Need Help? Call our Team on 0115 6976 800

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.

3x2-c16-treated-timber-joist-structural-timber
DIY Building Supplies

3x2 Treated Timber C16 Kiln Dried Regularised Joist 47x75mm - 3.6m

£5.26 Ex VAT
£6.31 Inc VAT

Our 3x2 Timber is quality, FSC certified timber, graded to a C16 standard and treated to resist moisture and pests. Measuring 47x75mm (finished size approx 45mm x 70mm) and spanning 3.6m in length, this timber undergoes kiln-drying and regularisation, ensuring a resilient yet lightweight structure suitable for a multitude of applications.

What is 3x2 Treated Timber in mm?

"3x2" relates to the joist size in inches which equates to 47 x 75mm. However, our 3x2  timber joists are regularised to ensure a smooth and consistent size along the entire length of the timber, which means the "finished" size is slightly smaller, approximately 45mm x 70mm.

This small size difference in the majority of projects will make no material difference, and is typical across 47x75mm (3x2) timber joists.

What are 3x2 C16 Treated Timber Joists Used For?

Often utilised in stud walling and partitioning, C16 timber boasts exceptional strength, making it well-suited for interior construction tasks. While it's not recommended for supporting the building's structure, its treatment extends its suitability to various outdoor applications like decking, fencing, sheds, pergolas, and various other outdoor structures.

What Does Kiln Dried Mean?

Kiln-dried timber is a popular choice for construction due to its numerous advantages over air-dried wood. The controlled environment within a kiln enables quicker and more uniform drying, minimising the typical risks of warping, cracking, and other imperfections often found in air-dried methods. This consistent moisture content significantly improves wood stability and strength.

What Lengths Does 3x2 C16 Timber Joist Come in?

We offer 3x2 timber in various lengths: 2.4m, 3m, 3.6m, 4.2m, and 4.8m. Although we strive to maintain stock across all sizes for efficient delivery, there might be intermittent delays or shortages in certain lengths. Should this occur, we may substitute longer lengths to ensure your order arrives promptly.

What Does C16 Stand For?

Timber is graded based on strength and quality, with C16 and C24 being among the most common grades in the UK. These grades indicate how well the timber can handle loads, particularly under bending stress.

C16 and C24 are primarily used in construction for structural purposes but serve different needs. C24 is ideal for tasks needing greater load-bearing capacity, like expansive spans or heavier loads.

However C16, while slightly less robust than C24, remains sturdy and widely used in wall and roofing applications with less stringent load requirements. Both grades offer reliability, but the choice between them depends on the specific structural demands of the project.

Do I Need Treated 3x2 Timber Joists?

Our 3x2 Treated Timber is suitable for both internal and external use. However, if your project might face moisture or pest challenges, treated timber is particularly suited to outdoor projects such as decking, roofing, and similar applications due to its enhanced resistance to moisture and pests.



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