Configuration
2 to 7 sashes, folding and stacking against the reveal.
Hinged Systems · Sosoares thermal-break bi-folding system
HT Bi-Folding System
Overview
HT is the Sosoares answer where an opening has to disappear rather than slide past itself. Two to seven sashes fold and stack against the reveal, clearing close to the full structural opening — the practical maximum aperture available in the range. The 77 mm frame and sash carry a polyamide thermal break, and the system is tested for air, water and wind at ITeCons. It is deliberately a mechanical rather than a performance proposition: Sosoares publishes no thermal transmittance and no acoustic result for HT, and KR does not infer either from the casement systems that share the platform's construction.
Thermal-break bi-folding in 2 to 7 sashes, to 3.50 m high. Catalogued as "HT — Sistema de harmónio com corte térmico"; the Sosoares website lists it as "HT System — folding system with thermal break" under Hinged / With Thermal Break
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Product highlights
Published Sosoares system characteristics for the HT:
Product highlights in detail
Dimensional limits
100 or 120 kg per sash, to 4.20 m² each.
Frame dimensions
77 mm fixed and mobile frame, in 136 and 130 mm folding assemblies.
Key system data
- Aluminium: 77 mm
- Mobile Frame: 77 mm
- Max Weight: 120 kg
- Max Height: 3500 mm
- Weather Resist: EN 12208 7A
- Wind Load: EN 12210 B1
- Glazing: 50 mm
- Sash Count: 7 sashes
Frame and sash depth are both 77 mm. Maximum weight is the upper of the two published hardware allowances, 100 kg or 120 kg per sash, with a maximum sash area of 4.20 m². Watertightness class 7A and wind resistance class B1 are from ITeCons AEV report CLX 07522/22, which also records air permeability class 4. Glazing 50 mm is the upper limit of the catalogue's 14–50 mm range. Sosoares publishes no thermal transmittance, no acoustic reduction, no security class and no fire rating for HT, and none is claimed here.
01 — Planning benefit
Planning benefit
HT is set out from the sash module. Sash length is capped at 1.20 m and height at 3.50 m, so the number of sashes follows from the opening width rather than being chosen. Confirm the stacking side and the reveal depth early — the folded stack needs somewhere to go.
Configuration
- Sash count: 2 to 7, per the catalogue typology set.
- Minimum sash length: 0.60 m on odd sash counts, 0.651 m on even.
- Maximum sash length: 1.20 m.
- Maximum height: 3.50 m.
- Profile cuts at 45° or 90°.
Dimensional limits
- Sash weight: 100 kg or 120 kg depending on the hardware set.
- Maximum sash area: 4.20 m².
- Glazing: 14–50 mm as published in the catalogue. The Sosoares website shows a narrower 17–50 mm; KR quotes the catalogue range and confirms the glass build-up at order.
- Polyamide thermal break: 24 or 32 mm.
Frame dimensions
- Fixed frame: 77 mm.
- Mobile frame: 77 mm.
- Catalogue plan sections show 136 mm and 130 mm folding assemblies at 77 mm depth.
02 — System integration
System integration
Maximum aperture — Folding is the only mechanism in the Sosoares range that clears close to the whole structural opening. Where a sliding system always parks a sash across part of the opening, HT stacks clear of it — which is the reason to accept the visible sash stack.
Reveal and stacking allowance — The folded stack occupies real depth beside the opening. KR agrees the stacking side, the reveal depth and the threshold detail with the builder before fabrication, because these cannot be resolved on site.
Threshold and drainage — A bi-folding threshold carries both the running gear and the water line. KR sets out the sill, the drainage path and the finished-floor junction as a single detail rather than three.
No published thermal or acoustic result — Sosoares publishes air, water and wind classifications for HT but no Uw and no Rw. Where a project sets a thermal or acoustic target on a large opening, KR specifies OS-Triple or an ST casement, both of which carry tested values, rather than claiming a figure for HT.
03 — Gallery
Gallery
Sections, renders and project photography reproduced from the Sosoares product catalogue. Architect and photographer credits are carried through as published.
Not supplied Project photography held back pending clearance
The catalogue's HT spread includes a project photograph whose named project does not appear in the official Sosoares imagery record, so it carries no verifiable architect or photographer credit. It is withheld. The installed detail above is published because it is an unattributed Sosoares product photograph rather than a project frame.
04 — Awards & accreditations
Awards & accreditations
ITeCons AEV test report CLX 07522/22: air permeability class 4, watertightness class 7A, wind resistance class B1.
Initial Type Test (ITT) for HT is published by Sosoares behind a trade login.
No thermal transmittance (Uw) is published for HT by either official source, and none is claimed.
No airborne sound reduction (Rw) is published for HT by either official source, and none is claimed.
No security class and no fire rating are published for HT, and neither is claimed.
Qualicoat Seaside powder-coating and Qualanod anodising quality marks apply to the Sosoares surface-treatment plant that finishes these profiles.
Test classifications quoted here are the European and Portuguese results published by Sosoares. They are not Australian certifications; KR confirms project compliance against the relevant Australian standards and the project wind study at tender stage.
Who makes this
Grupo Sosoares originates from "Sosoares – Máquinas e Ferragens, Lda.", founded in 1979, and today comprises four companies (Sosoares S.A., Alfa Sul S.A., Alulider Lda., Portalex S.A.) covering design, development, production and commercialisation of aluminium frames and glass systems under the own brand "Sistemas Euro 2000®".
05 — Technical information
Technical information
Figures are published Sosoares system maxima, minima and test results, stated with the standard or test reference under which they were determined. Project values depend on configuration, glazing build-up and installation, and are confirmed by KR at tender.
Dimensions and profile
Frame and sash share the 77 mm depth; the folding assemblies are shown in plan section.
| Fixed frame | 77 mm |
|---|---|
| Mobile frame | 77 mm |
| Folding assemblies (plan section) | 136 mm | 130 mm at 77 mm depth |
| Glazing | 14–50 mm (catalogue); 17–50 mm on the Sosoares website |
| Polyamide thermal break | 24 | 32 mm |
| Profile cuts | 45° | 90° |
| Sash count | 2 to 7 |
| Min sash length — odd / even count | 0.60 m / 0.651 m |
| Max sash length | 1.20 m |
| Max sash area | 4.20 m² |
| Max sash weight | 100 kg | 120 kg |
| Max height | 3.50 m |
Tested performance
One ITeCons AEV report covers HT. Everything not listed in it is recorded below as not published, and is not claimed.
| AEV report | ITeCons CLX 07522/22 |
|---|---|
| Air permeability | Class 4 |
| Watertightness | Class 7A |
| Wind resistance | Class B1 |
| Uw | Not published — no thermal value is claimed |
| Rw | Not published — no acoustic value is claimed |
| Security rating | Not published — no RC class is claimed |
| Fire rating | Not published — no rating is claimed |
| Motorisation | Not published for HT |
Materials and finishes
Aluminium with polyamide thermal break.
| Frame material | Aluminium with 24 or 32 mm polyamide thermal break |
|---|---|
| Gaskets | EPDM |
| Finishes | Powder coating to Qualicoat Seaside, or anodising to Qualanod |
06 — Documentation
Documentation
Sosoares publishes the HT technical documentation openly. KR holds current editions as Sosoares' Australian partner and will supply the relevant sheets for a nominated project.
HT technical catalogue (v11jun2025)
Published by Sosoares. Opens in a new tab.
Sosoares HT product page
Published by Sosoares. Opens in a new tab.
07 — Specification texts
Specification texts
Specification summary for the Sosoares HT. The complete, tender-ready specification text is issued by KR for a nominated project.
- Thermal-break aluminium bi-folding system, 77 mm fixed and mobile frame with 24 or 32 mm polyamide thermal break.
- Configuration: 2 to 7 folding sashes; minimum sash length 0.60 m on odd counts and 0.651 m on even; maximum sash length 1.20 m.
- Glazing 14–50 mm; profile cuts at 45° or 90°.
- Maximum sash 4.20 m², 100 kg or 120 kg depending on hardware set; maximum height 3.50 m.
- Air permeability class 4, watertightness class 7A and wind resistance class B1 to ITeCons report CLX 07522/22.
- No thermal transmittance and no airborne sound reduction figure is published for this system. Where either governs, KR specifies OS-Triple or an ST casement, which carry tested values.
- Threshold, drainage and finished-floor junction to be detailed as a single assembly; stacking side and reveal depth to be confirmed before fabrication.
- Finish: powder coating to Qualicoat Seaside or anodising to Qualanod, colour to the project schedule.
- Fabrication, installation and commissioning by KR Installations, Australia wide.
08 — CAD data
CAD data
On request BIM and CAD objects for the HT system are available on request from KR Installations.
KR issues the relevant sections, jamb and sill details for a nominated project, and can arrange project-specific profile geometry through the Sosoares technical department.
09 — Brochures
Brochures
On request Brochures for the HT system are available on request from KR Installations.
KR supplies the current Sosoares product catalogue and the system-specific literature that matches your project scope.
Specifying the HT system?
KR is Sosoares' Australian partner and fabricates, installs and distributes the OS minimalist range Australia wide. Talk to our team about configurations, thresholds, glazing build-ups and site conditions.
Enquire with KR Back to Sosoares Back to Windows & Doors
Sosoares is a registered trade mark of Grupo Sosoares. For project-specific dimensions, performance data outside the standard range, or BIM/CAD files, the Sosoares technical department can be reached at comercial@sosoares.pt — Rua do Campo Alegre, 474, 4150-170 Porto, Portugal. Values are indicative and depend on configuration, glazing and installation.