WS concealed-fix clip-lock roof sheets (Cliplock)

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.

WS clip-lock roof profiles — WS Cliplock profiles – cover width and rib height in mm.

Profiles and technical data

WS clip-lock roof sheets
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.

Standards and requirements by market

Codes World Steel designs, fabricates and documents this product to – and the key geometric and load requirements in each market.

United States

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

All United States standards →

Australia / NZ

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)

All Australia & New Zealand standards →

Europe

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

All Europe standards →

Summary for orientation only – the project specification, the adopted code edition and the authority having jurisdiction govern.

Finishes

Finish	Standards / notes
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

Frequently asked questions

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.