- Three profiles: WS 1000-40-4, 970-41-4, 945-41-4
- Snap-on fixing over concealed clips – no exposed screws
- High-tensile G550 steel, 0.45–0.60 mm
- Fast installation without seaming
Concealed fixing without seaming
Clip-lock sheets are fixed by snapping the ribs over concealed clips screwed to the purlins. There are no fasteners through the sheet and no seaming machine is needed – a clean roof that installs quickly.
The high-tensile G550 substrate gives stiffness at thin gauges. Middle and side clips (CT-1 / CT-2 positions) hold every rib.
Profiles and technical data
| Code | Cover (mm) | Coil width (mm) | Rib (mm) | Thickness (mm) | Yield | Use |
|---|---|---|---|---|---|---|
| WS 1000-40-4 | 1000 | 1200 | 39 | 0.45–0.60 | G550 | Roof |
| WS 970-41-4 | 970 | 1200 | 41 | 0.45–0.60 | G550 | Roof |
| WS 945-41-4 | 945 | 1200 | 41 | 0.45–0.60 | G550 | Roof |
Good practice
- Lay sheets in the direction away from prevailing weather
- Check clip alignment every few purlins
- Engage the ribs fully along the whole length before walking on the sheet
- Use matching clips for each profile
In cyclonic regions, concealed-fix roofs must be tested and installed to the applicable cyclonic test and installation requirements.
المعايير والمتطلبات حسب السوق
المعايير التي تصمم World Steel هذا المنتج وتصنّعه وتوثّقه وفقها – والمتطلبات الهندسية الرئيسية ومتطلبات الأحمال في كل سوق.
الولايات المتحدة
- ASTM A653 / A792Galvanized / 55 % Al-Zn coated sheet
- ASTM A755Coil-coated (pre-painted) metallic-coated sheet
- AISI S100Cold-formed steel design
- ASTM E1592 · UL 580Wind uplift testing of roof panels
أستراليا / نيوزيلندا
- AS 1397Metallic-coated steel sheet – G300 to G550, Z / AZ coatings
- AS/NZS 2728Pre-finished / pre-painted sheet
- AS 1562.1Design and installation of metal roof and wall cladding
- AS 4040Methods of testing sheet roof and wall cladding (incl. cyclonic)
أوروبا
- EN 10346Continuously hot-dip coated steel flat products
- EN 10169Organic coated (pre-painted) steel flat products
- EN 14782Self-supporting metal sheet for roofing and cladding – CE marking
- EN 1993-1-3Cold-formed members and sheeting
ملخص للاسترشاد فقط – تسري مواصفات المشروع وإصدار المعيار المعتمد والجهة المختصة.
التشطيبات
| التشطيب | المعايير / ملاحظات |
|---|---|
| Zinc-aluminium (AZ) coated | AZ100–AZ150 · AS 1397 / ASTM A792 / EN 10346 |
| Galvanized (Z) | Z180–Z275 · AS 1397 / ASTM A653 / EN 10346 |
| Pre-painted | Polyester or SMP paint system on AZ / Z substrate · AS/NZS 2728 / ASTM A755 / EN 10169 |
| Colours | Standard colour range; special colours on minimum order quantity |
الأسئلة المتكررة
What is the difference between clip-lock and standing seam?
Clip-lock sheets snap onto clips and need no seaming; standing seam sheets are seamed together on site and allow more thermal movement on very long sheets.
Why is G550 steel used?
High-tensile G550 steel gives the stiffness the profile needs at 0.45–0.60 mm thickness.







