8×2 C16 Tanalised Timber
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
Price range: £14.00 through £19.00
What you can build with this timber:
External Structural Framing (Most Common Use)
- Application: Wall frames, support posts, and structural members for outbuildings, sheds, and agricultural structures
- Length selection: 3.6m suits standard wall heights; 4.8m for taller structures or longer runs
- Treatment benefit: Handles constant weather exposure without rotting
- Outcome: Durable external frames that don’t need replacing every decade
Pergolas and Garden Structures
- Use: Main beams and uprights for pergolas, arbours, and covered outdoor spaces
- Section advantage: 8×2 provides substantial support for roof loads and climbing plants
- Installation: Regularised edges make clean joints and bolt connections easier
- Outcome: Garden structures that handle UK weather and look professional
Agricultural Buildings and Field Shelters
- Wall framing for livestock shelters, hay stores, and machinery sheds
- Structural support in three-sided field shelters
- Uprights and rails in open agricultural buildings
- Outcome: Farm structures built to last with certified structural timber
External Decking Subframes
- Use: Bearer joists for decking platforms and raised outdoor areas
- Spacing: Typically 400mm to 600mm centres depending on deck board thickness
- Ground clearance: Must be raised off ground with adequate ventilation
- Outcome: Stable deck structure that doesn’t sag or rot prematurely
Specifications:
| Specification | Details | Standard |
|---|---|---|
| Nominal Size | 8×2 inch (200mm × 47mm) | — |
| Finish | Regularised (planed for consistent width) | BS EN 336 |
| Available Lengths | 3.6 metres and 4.8 metres | — |
| Structural Grade | C16 (General Purpose) | BS EN 338 |
| Strength Grading | Machine graded to C16 | BS EN 14081-1 |
| Treatment | Pressure-treated (Tanalised) | — |
| Treatment Class | Suitable for external use and ground contact | — |
| Species | Softwood structural timber | — |
Why Choose This Product:
We Dry-Store Treated Timber Before Delivery
Pressure-treated timber arrives wet from the treatment plant. We dry-store it flat and under cover, allowing surface moisture to evaporate before delivery. When your timber arrives, it’s not dripping with treatment fluid and won’t warp as severely during installation. Many suppliers deliver straight from treatment – you end up with twisted timber and green staining on everything.
We Deliver It Ourselves
No couriers, no third-party logistics. Our team loads your timber, drives it to site, and unloads it where you need it. For longer lengths like 4.8m sections, this means less damage in transit and delivery times you can rely on for project scheduling.
Trade Quality for Everyone
We supply the same C16 structural timber to professional builders, farmers, and DIYers across North Yorkshire and East Yorkshire. Whether you’re building one pergola or five agricultural sheds, you get properly graded, fully treated timber.
Frequently Asked Questions:
Can I use this timber for internal framing?
Yes, but it’s unnecessary and wasteful. This timber is pressure-treated for external use. For internal framing in dry, heated buildings, use untreated structural timber instead – you’ll save money and avoid the damp timber issue that comes with treatment. Treatment is only needed where timber is exposed to moisture.
What’s the difference between 3.6m and 4.8m lengths?
Just the length. Both are the same 8×2 section, same C16 grade, same treatment. Choose 3.6m for standard wall heights and smaller structures. Choose 4.8m for taller frames, longer spans, or when you need fewer joints. Longer lengths reduce waste on large projects but are harder to transport.
Why is treated timber damp when it arrives?
Pressure treatment forces preservative deep into the timber under high pressure, saturating it. We dry-store treated timber before delivery to let surface moisture evaporate, but it will still be damper than untreated timber. Store it flat and covered on site. It will continue drying over several weeks. Don’t seal or paint treated timber until it’s fully dried.
Can I use 8×2 C16 for decking joists?
Yes, as bearer joists for the subframe, but ensure adequate spacing. For typical deck boards, space joists at 400mm to 600mm centres depending on board thickness. Joists must be raised off the ground with proper ventilation underneath – don’t let them sit in damp. For spans over 2.4m, check span tables or consult a structural engineer.
What if Building Control asks about the timber grade?
This timber is machine strength-graded to C16 standard under BS EN 14081-1. It’s suitable for general structural use where C16 is specified or accepted. If your project requires C24 or engineered timber, contact us before ordering – we can supply higher grades when needed.
Can I cut or drill treated timber on site?
Yes, but treat all fresh cuts. When you cut or drill pressure-treated timber, you expose untreated wood. Apply end-grain preservative (available from timber merchants) to all cut ends, drill holes, and notches. Without this, moisture enters through untreated surfaces and rot starts from inside the timber.
How do I know if C16 is strong enough for my project?
If your project has structural drawings or calculations, they’ll specify the required grade. For standard agricultural buildings, sheds, and garden structures without engineered designs, C16 is typically adequate. If you’re unsure, describe your project when ordering – we’ll tell you if C16 is appropriate or if you need to upgrade to C24.
Should I let treated timber dry before building with it?
Yes, when possible. Treated timber can be used immediately for rough framing, but for finished work or where tight tolerances matter, let it dry for 2-4 weeks after delivery. Stack it flat with spacers between layers to allow air circulation. Trying to achieve tight fits with wet, freshly treated timber leads to gaps as it dries and shrinks.
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