Planed fir post

Name: Planed fir post
Brand: Levigne
SKU: POTSAPRAB
Price: 13.39 EUR
Availability: InStock

Planed solid fir post and batten, untreated, sections 7x7cm, 9x9cm, 11x11cm and 14x14cm, lengths 200cm and 240cm, sold individually. Smooth 4-sided finish, class 2: dry indoor use or covered outdoor use – staining or saturating treatment is mandatory before any exposure to rain or prolonged moisture, as untreated planed fir is not weather-resistant. Framing, partition, covered bioclimatic pergola – ready to paint or lacquer to the desired finish.

Length (cm)

Section (cm)

Reference POTSAPRAB7070200

€13.39 incl. tax

In stock Dispatched within 10 days

Quantité

Paiement :

Paiement en 2x, 3x, 4x avec

Planed Fir Post — Sections 7x7cm to 14x14cm, Lengths 200cm and 240cm

This planed solid fir post is a square-section piece intended for load-bearing structures: pergola, carport, garden shed, fence, raised deck. Available in 4 sections — 7x7cm, 9x9cm, 11x11cm, 14x14cm — and in two lengths: 200cm and 240cm. The piece is delivered untreated, ready to be protected according to its use and exposure.

These planed fir posts cover a range from small sections (7x7cm) suited to framework battens and light studs, through to larger sections (14x14cm) for indoor pergolas or covered structures. Planed fir offers sharp edges and smooth faces, suited to applications where the piece is visible.

Key characteristics

Characteristic	Value
Species	Solid fir
Finish	Planed — untreated
Available sections	7x7cm, 9x9cm, 11x11cm, 14x14cm
Available lengths	200cm and 240cm
Use class	Class 2 — dry indoor use, covered outdoor use with appropriate treatment
Treatment	Untreated — to be protected according to exposure
Drying	Air-dried — natural method
Cutting	Sold individually

Key points

✓ 4 sections available — 7x7cm, 9x9cm, 11x11cm, 14x14cm
✓ 2 lengths — 200cm and 240cm, can be cut on site
✓ Planed solid fir — class 2 — dry indoor use, covered outdoor use with appropriate treatment
✓ Air-dried — natural method preserving the characteristics of the timber
✓ Untreated — to be protected according to use and exposure
✓ Sold individually

Which section to choose:

The choice of section depends on the post height, the load to be supported and the spacing between posts:

✓ 7x7cm — small light structures, single-pitch carports, fences
✓ 9x9cm — standard pergola, garden shed, deck up to 3m span
✓ 11x11cm — heavy roof structures, portal frames, major load-bearing structures

For structures subject to significant loads (snow, wind, spans> 4m), consult a timber structural engineer or a carpenter for precise sizing.

Installation advice

Never embed an untreated post directly in the ground — even class 3 Douglas fir deteriorates rapidly in contact with damp soil. For embedded posts, use stainless steel base plates anchored in concrete, or opt for pressure-treated class 4 timber. For posts set on a slab, use adjustable galvanised or stainless steel post bases. Apply protection to all faces before installation, paying particular attention to cut ends.

Maintenance and protection

In dry indoor conditions, no treatment is required. For a covered pergola or protected outdoor use, apply a fungicide-insecticide treatment before installation. Untreated fir is sensitive to moisture — do not expose to the elements without protection.

WoodUp Advice

The small 7x7 and 9x9cm sections are suitable for interior framework battens and light studs. For an outdoor bioclimatic pergola, prefer the 11x11 or 14x14cm sections and treat the timber before installation.

Before purchasing: Planed fir has dimensions slightly smaller than the nominal sizes (e.g. 70mm planed for a nominal section of 7cm). Check the exact dimensions on receipt for your assembly calculations.

Frequently asked questions

Which post section for a pergola?

For a standard residential pergola (3–4m span, light roofing), the 9x9cm section is generally sufficient for a height of 240cm. For a pergola with a planted or heavy roof, or spans> 4m, choose a larger section. If in doubt, consult a carpenter or a structural engineer.

Can this post be embedded directly in the ground?

No. An untreated post must not be placed in direct contact with damp soil — even class 3 Douglas fir deteriorates in ground contact (class 4 required). Use a base plate anchored in concrete, or order pressure-treated class 4 timber for embedded posts.

Does this post need to be treated before use?

Untreated fir is sensitive to moisture — a fungicide-insecticide treatment is recommended for any outdoor use. In dry indoor conditions, no treatment is necessary.

What is the difference between a sawn and a planed post?

The sawn post retains the natural sawn appearance with slightly irregular faces and nominal dimensions (e.g. 100x100mm). The planed post is machined on all 4 faces to achieve smooth surfaces and precise dimensions, slightly smaller than nominal. For exposed structures, the planed finish offers a neater result. For concealed or embedded structures, the sawn version is equivalent.

Can these posts be painted or stained?

Yes. Lightly sand the faces (80–120 grit) before application. For exterior paint, apply a primer specifically for resinous timber. For stain or oil, apply directly to dry timber. Planed posts offer better adhesion for finishing products.