Premium Black Walnut Press-Curved Slat | 136.5 x 7.7 x 2.3 cm

A long-span walnut slat: 136.5 cm of steam-bent black walnut in a slender 7.7 x 2.3 cm section. Length is the point of this size — it covers a wide seat frame or a full back span in one piece, with no joint in the visible face — and walnut is the point of the species: the dark, figured surface reads as premium wherever it is seen.

What the dimensions mean

At 136.5 cm the slat spans wide frames: bench-style seats, extra-wide dining chairs, or back slats that run the full height of a tall back. The 2.3 cm thickness keeps it light enough to bend to a gentle curve and light enough to handle in assembly, while the 7.3–7.7 cm width gives enough surface for a seat or a substantial back slat.

Specifications

Where this size is used

• Wide seat frames — one piece covers a span that would otherwise need a joint.
• Tall back slats — full-height verticals on high-backed seating.
• Bench and daybed seating — long slats across wide frames.
• Contrast programmes — dark walnut slats against pale ash or beech frames.

Working with walnut at this length

Length is where walnut needs care. Blanks are selected for grain run-out — a board whose grain angles toward one face will not survive a long bend — and figure is matched across the pieces that make up one visible element, because mismatched boards read as a defect even when every piece is sound. Finishes: oil or hard-wax oil keeps the surface repairable and lets the figure read; clear lacquer seals it for cleaning. Walnut lightens with UV exposure over years, so a renewable finish ages better.

Ordering

Standard sizes ship from repeated production; custom lengths follow quotation, sample, production. Long slats are packed to support the full length of the curve. Send your specification through our contact page for a quotation within 24 hours. See also our bent walnut page.

Questions buyers ask: Can longer lengths be produced? Yes — longer spans are made to order. Is the figure matched across a set? Yes, colour-matched sets are available for production runs. What finish suits walnut? Oil or hard-wax oil for a renewable surface.

How this size fits the range

Within the walnut slats, this 136.5 x 7.7 x 2.3 cm size is the long-span option. The range runs from 55 cm to 136.7 cm in length; this is the size you choose when the frame is wide and the joint line is unacceptable. The alternative at this length is the 136.7 x 7.8 x 2.1 cm slat — nearly identical in every dimension, but a shade more slender. If your design needs the absolute minimum visual weight, that one; if the marginal extra section helps the span, this one. We quote both where the choice is genuinely marginal.

Finishing and care

Walnut’s dark surface is the reason it was specified, so the finish is a protection decision as much as an aesthetic one. Oil and hard-wax oil keep the surface repairable and let the figure read naturally; clear lacquer seals it for cleaning and adds sheen. Walnut lightens with UV exposure over years — an oil finish is easier to refresh than a film finish when that happens. For parts that will be handled, we recommend a finish that can be renewed in place rather than one that must be stripped.

Frequently asked questions

Can longer lengths be produced?

Yes — lengths beyond 136.5 cm are made to order, with feasibility confirmed against the species and section before quoting.

Is the figure matched across a set?

Yes — colour-matched sets are available for production runs, because mismatched boards read as a defect even when every piece is sound.

What finish suits walnut best?

Oil or hard-wax oil for a renewable surface that lets the figure read; clear lacquer where the piece will be cleaned commercially.

Will a slat this long move in service?

All wood moves with humidity. Parts are dried in their forms to a working moisture content and verified before machining, with the target set against your destination market.

How is a long slat packed?

Packed to support the full length of the curve, with corner protection at the bends — a slat that arrives kinked cannot be straightened at your bench.

Sizing at a glance

Programme notes

Length is a logistics question as much as a manufacturing one. A 136.5 cm slat cannot be bent, dried, machined, finished and shipped like a short one: the drying chamber holds it for the full cycle, the CNC passes are longer, and the packing has to support the whole length or the piece arrives kinked. Our lead times for this size are the standard 7–15 days for prototypes and 15–30 for bulk — but the packing and freight planning deserve as much attention as the bending, and we will talk through both when you order.

For programmes running this slat at volume, the figure-matching question comes up early: colour-matched sets are quoted per run, because the boards that make up one visible element have to be selected together.

Summary

136.5 cm of figure-matched black walnut in a slender section — for wide spans and tall backs where the joint line is unacceptable and the dark surface is the point. Send the drawing with your curve and quantity; we confirm feasibility, quote within 24 hours, and deliver prototypes in 7–15 days, packed to support the full length of the curve.