The structural slat: 109.5 cm long but only 4.6 cm wide, with a full 4 cm section. This is not a seat board — it is a load-bearing element. Stretchers, seat supports, back rails and any part where a long, narrow, strong piece of bent ash does the work that a joist does in a floor.
What the dimensions mean
Width and section tell you what a slat is for. At 4.6 cm wide there is no pretence of a seating surface — the narrow width keeps the piece light and lets it bend to a useful curve. At 4 cm thick it carries real load: this is the section you specify when a stretcher or support has to hold weight across a 109.5 cm span without deflecting. At 109.5 cm it covers long frames in one piece.
Specifications
| Material | Solid white ash (Fraxinus spp.) |
| Dimensions | 109.5 x 4.6 x 4 cm |
| Construction | Solid steam-bent; section sized for load |
| Finishes | Raw, sanded, oiled, stained or lacquered |
| MOQ | From 1 piece |
| Lead time | Prototype 7–15 days · bulk 15–30 days |
| Certification | FSC/PEFC materials available |
Where this size is used
- Stretchers and seat supports — the primary use: load across a long span.
- Back rails — structural horizontal elements on tall backs.
- Curved braces — any part where a long, narrow, strong bent element is specified.
- Frame stiffening — elements that stop a frame racking in service.
Why ash carries this section
Ash is shock-resistant and elastic — it takes the flexing that a loaded stretcher experiences season after season without fatigue, and its straight grain bends to the gentle curves this application needs. The 4 cm section is chosen so the part can take fixing points at any position along its length without splitting at the ends.
Ordering
Send the drawing with the span, section and any load requirement; we confirm the construction, quote within 24 hours, and deliver prototypes in 7–15 days. See also our chair frames capability page for how structural bent elements are specified into seating programmes.
Questions buyers ask: Can the section be increased for heavier loads? Yes — sections are made to your drawing. Is this size available in other species? Beech and walnut are both supplied. Can fixing points be machined along the length? Yes, to your spec.
How this size fits the range
Most slats in our range are surface elements — seat and back boards. This 109.5 x 4.6 x 4 cm size is not. It is the structural option: the narrowest width and the thickest section we produce at this length, specified when the part has to carry load rather than present a surface. If you are looking at this slat, you are probably designing a stretcher, a support or a back rail — and the question is not whether it looks right but whether the section holds.
For surface elements at similar lengths, see the 116 x 12 x 3.2 cm seat slat; for the same structural job in a shorter span, the 58.2 x 7.3 x 3 cm all-rounder doubles as a light stretcher.
Finishing and care
Structural elements are usually finished for protection rather than appearance: oil or a clear lacquer seals the surface against the moisture cycling that loosens joints over time. Because the part is narrow, the end grain at the fixings is the vulnerable point — we recommend the fixing points are machined before finishing so the finish seals the cut surface too. Raw slats are sanded to 180 grit for your own schedule.
Frequently asked questions
Can the section be increased for heavier loads?
Yes — sections are made to your drawing. Tell us the span and the load and we will confirm the section that holds it.
Is this size available in other species?
Beech and walnut are both supplied at this size; ash is the default for its elasticity and shock resistance.
Can fixing points be machined along the length?
Yes — drilled and countersunk points anywhere along the slat, machined before finishing.
What radius can this section reach?
A 4 cm ash section takes a gentle curve comfortably; tighter radii need a thinner section or lamination. Send the drawing and we will confirm.
Do you supply matching curved braces?
Yes — stretchers, braces and back rails are all made to the same drawing set so the curves match across the frame.
Sizing at a glance
| Length | 109.5 cm — long span without intermediate support |
| Width | 4.6 cm — narrow; no pretence of a seating surface |
| Section | 4 cm — the heaviest in the range; sized for load |
| Primary use | Stretchers, seat supports, back rails, braces |
| Load class | Structural — the load-bearing option |
Programme notes
If you are specifying this slat, you are doing engineering, not shopping. The conversation worth having before ordering is about the load: the span it covers, the weight it carries, and how it is fixed at each end. Section, species and the position of the fixing points all follow from those answers, and we would rather have that conversation at quotation stage than discover a deflection problem in your assembly.
Production consistency matters more on structural parts than on surface elements, because a 2 mm variation shows up as a rack in the frame rather than a visual blemish. Dimensions are verified to ±0.5 mm after machining, and inspection reports accompany each shipment so your incoming QC can trace any issue to a stage.
Summary
109.5 x 4.6 x 4 cm of solid white ash — the structural slat, bent so the grain carries the load around the curve instead of a joint carrying it across one. Send the span, section and load requirement; we confirm the construction, quote within 24 hours, and deliver prototypes in 7–15 days.
Quick Specifications
| SKU | JX-SBW-ASH-24 |
|---|---|
| Material | White Ash |
| Process | Steam bending (solid wood) |
| Dimensions (L x W x T) | 109.5 x 4.6 x 4 cm |
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