Minimalist Sliding Door Series
FORMA146 is one of our signature sliding door systems, installed in a large number of projects worldwide with more than two hundred profile variations. A 39 mm glazing opening takes double glazing or multi-layer glass, and the roller-bearing pulleys support a single 3 m × 6 m sash up to one tonne. The frame is fully concealable, with a 20.9 mm centre mullion that can be reinforced with stainless steel for high-wind areas or extra-tall panels. An Electric Series variant is available.
Automatic Option Doors
Specification
| Field | Manual Series | Electric Series | Concealed Track Series |
|---|---|---|---|
| Frame width (V.S.) | 161.3 mm | 146.1 mm | 146.1 mm |
| Upper track | 55 mm | 91.9 mm | 91.9 mm |
| Glass | 38 mm | 38 mm | 38 mm |
| Sash | 17 mm | 21.9 mm / 17 mm | 21.9 mm / 21 mm |
| Lower track | 55 mm | 55 mm | 55 mm |
| Cover (concealed only) | — | — | 22.3 mm |
| Centre mullion width (C.S.) | 20.9 mm | 20.9 mm | 20.9 mm |
| Frame (C.S.) | 46.7 mm | 46.7 mm | 46.7 mm |
| Maximum size | Single leaf 3 m × 6 m = 18 m² | Single leaf 3 m × 6 m = 18 m² | Single leaf 3 m × 6 m = 18 m² |
The Manual Series has a different overall frame width (161.3 mm) than the Electric and Concealed Track variants (146.1 mm each) — three genuinely different profile widths for the one series, all shown above.
Dimensions and weights are as specified by FORMA and should be verified against final project or shop-drawing requirements before use in any quotation or specification.
Performance
| Series | Thermal Insulation (unit not stated by FORMA) | Water Tightness | Air Tightness | Wind Resistance | Sound Insulation |
|---|---|---|---|---|---|
| Manual | 1.4 | 7A | CLASS 3 | CLASS B4 | 40 dB |
| Electric | 1.4 | 7A | CLASS 3 | CLASS B4 | 40 dB |
| Concealed Track | 1.4 | 7A | CLASS 3 | CLASS B4 | 40 dB |
*Data references EU EN14351-1: 2006+A2: 2016
Certification
Tested to AS 1530.8.1:2018+A1:2024 as part of a five-system glazing test by Intertek (report 260410005SHF-001; tested 23 April 2026, issued 28 May 2026).
Tested to AS 2047-2014 (Amdt 2-2017) by Intertek (report 220627005SHF-002; tested 5 September 2022, issued 23 October 2022).
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Talk to FORMA about this system
Tell us the opening size and where it sits in the building, and we will come back on whether this system suits it.