Membrane pathways
PTFE fibreglass, PVDF-coated polyester and project-specific ETFE single-layer / cushion systems.
TECHNICAL CENTRE
Evidence before specification.
ZAHREQ technical claims remain tied to the selected membrane, structure, site conditions and approved manufacturing pathway.Structural steel
S355 / Q355-equivalent pathway available subject to project specification.
Wind design
Project-specific; site, terrain, height, surroundings, geometry and applicable code are reviewed rather than relying on a catalogue rating.
Engineering standards
Supplier-stated pathways include AS/NZS, Eurocode, ASCE and GCC project requirements.
Coastal protection
Hot-dip galvanising with supplier-recommended minimum 85 μm zinc for selected GCC coastal projects; duplex galvanised + powder-coat pathway available.
Marine hardware
316 / 316L exposed cables, turnbuckles, bolts and selected hardware available.
Engineering deliverables
Structural calculation reports, shop/fabrication drawings, connection and reaction information subject to project scope.
Installation support
Installation documentation, remote technical support and supplier site supervision can be scoped.
MEMBRANE REFERENCE
Current supplier-backed starting points.
These are qualification references, not universal project guarantees. Final membrane datasheets and certificates are matched to the selected project material.
Standard supplier reference
- Nominal mass
- 1100 g/m²
- Thickness
- 0.85 ± 0.02 mm
- Tensile strength
- 5500 / 5200 N/5 cm
- Translucency
- 6–8%
- Supplier warranty pathway
- 10–15 years
Standard supplier reference
- Nominal mass
- 1050 g/m²
- Thickness
- 0.70 ± 0.02 mm
- Tensile strength
- 6500 / 6000 N/5 cm
- Translucency
- 12 ± 3%
- Supplier warranty pathway
- 20–25 years
Project-specific system
Single-layer and cushion pathways are available. ETFE requires tighter geometry coordination; final manufacture follows verified structural measurements.
GEOMETRY CONTROL
Fit is engineered, not assumed.
For overseas PTFE and ETFE work, site erection tolerances can materially affect membrane fit. ZAHREQ therefore treats final supporting-geometry verification as a project-control stage where required.
Approved steel geometryAs-built / survey data where requiredCritical-dimension verificationFinal membrane release after geometry check
WARRANTY CONTROL
Membrane warranty is not whole-system warranty.
Current supplier qualification supports a typical 10–15 year PVDF membrane-material pathway and 20–25 year PTFE membrane-material pathway, subject to the exact selected product and written warranty. Structural steel, coatings, fittings, installation and other components remain governed by the project-specific written warranty. Extended structural/coating terms are still being qualified.
PLANNING GUIDES
Choose the material and brief the project properly.
PROJECT TECHNICAL REVIEW
Bring the design basis early.
Share drawings, location, geometry, intended use, wind/fire criteria and exposure so the correct membrane and engineering pathway can be assessed.