Standard structural timber for general construction, internal framing, and agricultural projects.
C16 Timber Products
Strength-graded C16 timber in 4.8m lengths, ideal for internal stud walls and structural framing projects across North Yorkshire and East Yorkshire.
✓ Perfect for internal stud walls and partition framing
✓ Regularised edges guarantee consistent width (±1mm)
✓ Kiln-dried to prevent warping after installation
✓ Building regulation compliant (BS EN 14081)
✓ Low cost delivery within 30 miles of Pickering, North Yorkshire
Pressure-Treated Structural Timber | 175×75mm | External Use
✓ Perfect for agricultural building roofs and shed structures
✓ Pressure-treated throughout for long-term weather resistance
✓ Kiln-dried to prevent warping after installation
✓ 15ft length (4.57m) suits standard roof spans
✓ Low cost delivery within 30 miles of Pickering, North Yorkshire
Regularised Structural Grade | Pressure-Treated | External Use
✓ Pressure-treated for long-term outdoor durability
✓ C16 structural grade for certified load-bearing use
✓ Regularised edges for consistent width and easy installation
✓ Available in 3.6m and 4.8m lengths
Pressure-Treated Structural Timber | 225×75mm | External Use
✓ Larger section for longer spans and heavier roof loads
✓ Pressure-treated for decades of outdoor durability
✓ C16 structural grade for certified load-bearing performance
✓ 15ft length suits agricultural and commercial roof structures
2×2 tanalised timber With EASED EDGES (easy edge) for easy handling)used for light structural and outdoor applications where treated durability is required.
4×2 C16 tanalised structural timber used for framing and external construction where strength grading and moisture resistance are required.
✓ Pressure-treated for long-term outdoor durability
✓ C16 structural grade for certified load-bearing use
✓ Regularised edges for consistent width and easy installation
✓ Three length options for flexibility across projects
6×2 C16 tanalised structural timber used for framing and external structural applications where certified grading and moisture resistance are required.
✓ Pressure-treated for long-term outdoor durability
✓ C16 structural grade for certified load-bearing use
✓ Regularised edges for consistent 145mm width
✓ Superior depth for longer spans and heavier loads
3×2 C16 tanalised structural timber used for framing and light structural applications where certified grading and cost-effective performance are required.
✓ Pressure-treated (UC3) for protection against rot and insect attack
✓ C16 structural grade certified for load-bearing frameworks
✓ Regularised & Eased Edges for consistent 47mm x 75mm dimensions and splinter-free handling
✓ Kiln-dried to under 20% moisture to prevent warping and shrinking
✓ Low cost delivery within 30 miles of Pickering, North Yorkshire
C16 timber is the industry-standard choice for structural applications where loads are moderate and engineering specifications allow for a standard strength grade. It is kiln-dried to reduce moisture content and available either untreated for dry internal use or pressure-treated (tanalised) for protection against decay.
C16 is a strength grade for softwood timber defined by European Standard EN 338. The “16” refers to its characteristic bending strength of 16 Newtons per square millimetre.
While C24 timber is a higher grade, C16 remains the most cost-effective solution for the majority of domestic and agricultural builds where shorter spans or moderate loads are required.
C16 timber is specified for a wide range of standard structural work:
Internal Framing: Stud walls, floor joists (within span limits), wall plates, and ceiling joists.
Outbuildings: Sheds, workshops, and summerhouse frames where structural certification is needed.
Agricultural Buildings: Purlins and cladding rails in barns and lean-tos.
Decking Sub-frames: When pressure-treated, the standard choice for supporting garden decking and boardwalks.
Every piece of C16 timber we supply is strength-graded in accordance with BS EN 14081, ensuring:
Building Control compliance for projects subject to local authority inspection, structural integrity through grading for bending, tension, and compression strength, and stability from kiln-drying to 18-20% moisture content.
It is essential to select the grade specified in your architectural drawings or structural calculations. C16 and C24 are not interchangeable.
| Feature | C16 Timber | C24 Timber |
|---|---|---|
| Strength Class | Standard | Premium |
| Best For | Stud walls, sheds, general framing | Main floor joists, long spans, high loads |
| Typical Span (4×2 joist at 400mm centres) | ~2.5m | ~2.9m |
| Cost | More economical | Higher price point |
Important: If your plans specify C24, C16 must not be used as a substitute.
For detailed span comparisons, read our article: C16 vs. C24 Timber: Making the Right Structural Choice
Untreated (White Wood): For dry, internal applications like partition walls, ceiling joists, and protected roof structures. Kiln-dried but no chemical preservative.
Tanalised (Pressure-Treated): Required for timber exposed to the elements or ground moisture. Our tanalised treatment protects against rot and insect attack. Essential for decking frames, garden buildings, and agricultural structures.
Simple rule: If it sees moisture, use tanalised. If it’s internal and permanently dry, untreated is sufficient.
No Silent Substitution: You get the exact grade you ordered, every time. We don’t supply C16 when you’ve ordered C24, or vice versa.
Straight & Square: We manage our own yard in Pickering to ensure stock is stored correctly and remains usable.
Local Expertise: Deal directly with people who understand construction and agricultural requirements across North Yorkshire.
C16 timber is the industry standard for domestic and agricultural framing. At Ryedale Timber, we manage our own yard in Pickering to ensure every length is stored correctly, remains straight, and meets structural grading requirements.
We specialise in serving trade and DIY customers across North Yorkshire and East Yorkshire. Our dedicated fleet provides reliable, fixed-price delivery to York, Scarborough, Malton, and Thirsk. We also regularly supply projects in Driffield, Bridlington, Whitby, and Filey.
For rural and coastal builds, we deliver to Helmsley, Kirkbymoorside, Easingwold, Pocklington, Guisborough, and Robin Hood’s Bay.
Choose between untreated timber for dry internal studwork or tanalised (pressure-treated) timber for external frames, sheds, and agricultural buildings. If your plans require a higher load-bearing capacity, we also stock premium C24 grades.
We deliver our full range of C16 to the following areas. Deliveries typically take 3–5 working days.
| Delivery Area | Postcodes Covered | Flat Rate | Minimum Spend |
|---|---|---|---|
| Pickering | YO18 | £5.00 | £50 |
| Malton | YO17 | £10.00 | £100 |
| Scarborough | YO11, YO12, YO13 | £10.00 | £100 |
| Filey | YO14 | £12.00 | £100 |
| Helmsley | YO62 | £15.00 | £150 |
| Kirkbymoorside | YO62 | £15.00 | £150 |
| Bridlington | YO15, YO16 | £15.00 | £200 |
| Whitby | YO21 | £20.00 | £200 |
| Robin Hood’s Bay | YO22 | £20.00 | £200 |
| Driffield | YO25 | £30.00 | £300 |
| York | YO1, YO10, YO19, YO23, YO24, YO26, YO30, YO31, YO32, YO43, YO44, YO51, YO60 | £30.00 | £300 |
| Easingwold | YO61 | £30.00 | £300 |
| Thirsk | YO7 | £35.00 | £300 |
| Pocklington | YO41, YO42 | £35.00 | £350 |
| Guisborough | TS14 | £40.00 | £500 |
Depending on your project, you might also need:
C16 is a structural strength grade for coniferous softwood (indicated by the “C”). The “16” represents a characteristic bending strength of 16 Newtons per square millimetre. Every piece of C16 timber from Ryedale Timber is kiln-dried to a moisture content of 18–20% and graded in accordance with BS EN 14081 to ensure it meets UK Building Regulations.
Yes, C16 is the industry standard for floor and ceiling joists in domestic builds. As a guide, a 4×2 (100x50mm) C16 joist at 400mm centres spans approximately 2.5 metres. For longer spans or higher loads, you must increase the depth of the timber (e.g., 6×2 or 8×2) or switch to a C24 grade.
Only if it is pressure-treated (tanalised). Untreated “white wood” C16 is for internal, dry use only (such as stud walls). For garden buildings, decking sub-frames, or agricultural projects, you must use tanalised C16 to protect against rot, fungal decay, and insect attack.
Neither is universally superior; the choice depends on the structural requirement. C24 is a higher grade with fewer knots, allowing for longer spans and higher loads, but it carries a higher price point. C16 is more economical and perfectly sufficient for most standard domestic framing and agricultural applications where engineering specifications allow.
Timber sizes are generally sold in “nominal” (pre-milled) dimensions. Common applications include:
Always check your structural drawings or Building Regulations for specific requirements.
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