Boom length and model matrix
Arm length decides the model, not the other way round. Every figure in this table is copied from the parameter table of the model next to it — nothing here is estimated. Measure the clear opening between the posts (not between cabinet centres), then read your span off the first column.
| Arm length | Recommended models | Drive & speed | Arm types available | Typical lane |
|---|---|---|---|---|
| 2.5–3 m | SC04 (pole ≤ 6 m straight) | Brushless DC, 3–6 s adjustable | Straight pole; 5 m fence pole | Single lane, small gated community or guard booth |
| 4 m | D206 (rod 4–5 m); SC04 (pole ≤ 6 m) | D206 3–6 s; SC04 3–6 s adjustable | D206 straight rod; SC04 straight pole or 5 m fence pole | Standard car-park single lane |
| 4.5 m | WS01 (4.5 m three railings); D206 (rod 4–5 m); SC04 (pole ≤ 6 m) | WS01 AC motor 1.2–6 s; D206 3–6 s; SC04 3–6 s | WS01 three-rail fence; D206 straight rod; SC04 straight or fence | Commercial entrance with pedestrian control |
| 6 m | SC04 · SC05 · WS01 · D02 · D05 | SC04/SC05 3–6 s; WS01 1.2–6 s; D02 3–6 s; D05 6 s | SC04 6 m straight or 5 m fence; SC05 octagonal and anti-collision bar; WS01 6 m straight, 6 m curved arm, 5.5 m two railings; D02 / D05 advertising boom | Wide lane, or a lane the owner wants to monetise with advertising |
| 7 m | K01 (rod ≤ 7 m); T01 (rod ≤ 11.5 m) | K01 3–6 s; T01 3–6 s | Bar type not stated in either datasheet table — confirm with engineering | Industrial entrance, warehouse gate |
| 8–11.5 m | T01 (rod ≤ 11.5 m, wind resistance 8–9); railway double-bar gate (rod 6–11.5 m) | T01 3–6 s; double-bar gate DC brushless, opening time not stated — confirm | T01 single rod; double-bar gate two extended bars | Toll booth, railway crossing, very wide opening |
Read the limits literally. Where a datasheet gives only an upper limit (≤ 6 m, ≤ 7 m, ≤ 11.5 m), the model is listed for arms shorter than that limit as well — the shortest arm length stated anywhere on this page is 4 m (D206, rod length 4M–5M, i.e. 4–5 m). Any arm below 4 m, or a boom that has to be cut to an exact non-standard length, needs confirmation from engineering before you specify it.
Which arm type fits the site
- Straight boom — the default for level approaches. SC04 lists a straight pole, SC05 an octagonal and anti-collision bar, WS01 octagonal, square, link, rubber-strip and anti-scratch rods, TK01 a straight bar.
- Fence boom (two or three rails) — closes the gap under the bar so pedestrians and animals cannot walk through. SC04 lists a 5 m fence pole, WS01 a 5.5 m two-rail and a 4.5 m three-rail, TK01 a fence bar, HQ-02 a fence pole.
- Curved / crank arm — folds the arm where headroom is limited. WS01 lists a 6 m curved arm pole; TK01 lists a crank arm bar. No other model on this page states a curved arm.
- Telescopic — WS01 lists a telescopic rod; D08 lists a telescopic rod (standard 100–1500 mm, 100–1800 mm) with a maximum barrier length of 5100 mm including the case.
- Double bar — the railway gate takes two extended bars, rod length 6–11.5 m optional, for very wide openings.
Three questions before you shortlist
- What is the clear opening? Measure post to post and read the span off the table above — that already narrows the range to two or three models.
- Is headroom restricted — underground car park ramp, low canopy, mezzanine deck? Then the arm has to fold or retract: WS01 curved arm pole, TK01 crank arm bar, or a telescopic rod.
- Does the site get strong crosswind? T01 is the only model on this page with a stated wind resistance rating (8–9). For any other model, ask for the wind class in writing before you commit an 8 m+ arm.
Send us the clear lane width and we come back with the arm length, the model that covers it and a factory-direct quotation for that exact configuration — if your span is unusual, say so and engineering will confirm it rather than us guessing.
Send lane width → or use the contact form
