Klip-Lok 406 Panel Dimensions, Rib Spacing, Gauge Range, and Span Tables
Klip-Lok 406 Panel Dimensions, Rib Spacing and Span Tables
The Klip-Lok 406 panel is a concealed-fix standing seam metal roofing profile designed for architectural, commercial, and residential roofing systems. Unlike traditional screw-fixed metal roofing sheets, Klip-Lok panels are installed using concealed clips that allow the roof to expand and contract naturally without penetrating the sheet surface.
The designation Klip-Lok 406 refers to the effective coverage width of the panel:
• 406 mm effective coverage width
This narrower panel width is commonly used in architectural roofing systems where aesthetics, watertight performance, and thermal movement are important considerations.
Klip-Lok 406 panels are commonly used in:
• architectural buildings
• commercial offices
• residential metal roofing
• schools and public buildings
• retail buildings
• low-slope roof systems
These panels are produced using precision roll forming machines that form steel coil into deep standing seam ribs.
This guide provides a detailed technical overview of Klip-Lok 406 panel dimensions, rib spacing, steel gauges, coil width requirements, and span tables used by engineers, contractors, and roll forming machine buyers.
What is a Klip-Lok 406 Panel
A Klip-Lok 406 panel is a concealed-fix standing seam roofing sheet designed for high-performance roofing systems.
Unlike exposed fastener roofing sheets, Klip-Lok systems use concealed clips that attach the sheet to the roof structure without penetrating the panel surface.
Key advantages include:
• concealed fastening system
• improved weather resistance
• thermal expansion capability
• long sheet lengths
• clean architectural appearance
These features make Klip-Lok 406 panels popular for architectural roofing projects.
Standard Klip-Lok 406 Panel Dimensions
Klip-Lok 406 panels typically contain two standing seam ribs across the panel width.
Typical dimensions include:
Specification
Typical Measurement
Coverage Width
406 mm
Overall Width
450 – 470 mm
Rib Height
40 – 50 mm
Rib Pitch
406 mm
Number of Major Ribs
2
Panel Length
Custom roll formed
Coverage width refers to the effective width after installation.
Rib Layout and Profile Geometry
The Klip-Lok 406 profile uses deep standing seam ribs to provide structural rigidity.
Typical rib layout characteristics include:
• two standing seam ribs
• wide flat pan between seams
• concealed clip fixing system
Typical rib dimensions include:
Feature
Measurement
Rib height
40 – 50 mm
Rib spacing
406 mm
Rib top width
40 – 60 mm
The standing seam design increases structural stiffness.
Klip-Lok 406 Panel Cross Section Dimensions
The cross section of the panel consists of two standing seam ribs separated by a flat pan.
Typical cross section characteristics include:
Rib height
40 – 50 mm
Panel coverage width
406 mm
Number of ribs
2 major ribs
Fixing system
Concealed clips
The concealed clip system eliminates exposed fasteners.
Steel Gauge Range for Klip-Lok 406 Panels
Klip-Lok 406 panels are typically manufactured using medium steel gauges.
Typical gauges include:
Gauge
Thickness
Typical Application
26 gauge
0.0179 in
Residential roofing
24 gauge
0.0239 in
Commercial roofing
22 gauge
0.0299 in
Architectural roofing
Thicker steel gauges provide greater structural strength.
Klip-Lok 406 Span Tables
Span tables determine the maximum distance the panel can span between structural supports.
Span capability depends on:
• steel thickness
• rib height
• roof slope
• wind loads
Typical span ranges include:
Gauge
Roof Span
26 gauge
3 – 5 ft
24 gauge
5 – 7 ft
22 gauge
7 – 9 ft
Engineering calculations must always be performed for specific building designs.
Coil Width Requirements for Klip-Lok 406 Panels
Steel coil must be slit to the correct width before entering the roll forming machine.
Typical coil widths include:
Panel Coverage
Coil Width
406 mm panel
480 – 520 mm coil
Extra material is required to form the standing seam ribs.
Materials Used for Klip-Lok 406 Panels
Klip-Lok 406 panels can be manufactured using several metal materials depending on environmental conditions.
Common materials include:
Galvanized steel
Galvalume steel
Aluminum
Pre-painted steel
Galvalume steel is widely used because of its corrosion resistance and long service life.
Industries Using Klip-Lok 406 Panels
Klip-Lok 406 panels are widely used in architectural and commercial roofing systems.
Typical applications include:
Architectural buildings
Commercial offices
Residential metal roofing
Schools and public buildings
Retail buildings
Low slope roofing systems
The narrow panel width allows flexible roof design.
Roll Forming Machines Used to Produce Klip-Lok 406 Panels
Klip-Lok 406 panels are produced using roll forming machines designed for concealed-fix standing seam roofing profiles.
Typical machine specifications include:
Number of forming stations
20 – 26 stations
Roller material
Hardened tool steel
Machine speed
10 – 25 meters per minute
Drive system
Gearbox drive
Cutting system
Hydraulic shear or flying shear
Control system
PLC automatic length control
These machines provide precision forming of architectural roofing profiles.
Installation Considerations
Correct installation ensures long-term roofing performance.
Important installation factors include:
Concealed clip installation
Thermal expansion allowance
Roof slope requirements
Sheet alignment
The concealed fixing system prevents roof leaks caused by exposed screws.
Engineering Load Considerations
Engineers designing Klip-Lok roofing systems must consider:
Wind uplift loads
Thermal expansion
Roof slope requirements
Structural support spacing
These panels are typically installed over steel purlins.
Common Manufacturing Problems
Manufacturing issues may occur if roll forming machines are not properly adjusted.
Common problems include:
Incorrect seam height
Clip engagement issues
Panel distortion
Roll tooling misalignment
Proper tooling setup ensures accurate standing seam geometry.
Frequently Asked Questions
What is Klip-Lok 406 roofing?
Klip-Lok 406 is a concealed-fix standing seam roofing system with 406 mm effective coverage width.
What gauge steel is used for Klip-Lok 406 panels?
Typical gauges include 26, 24, and 22 gauge steel.
What are the advantages of Klip-Lok roofing?
Advantages include:
• concealed fasteners
• watertight roofing system
• thermal movement capability
• architectural appearance
Where is Klip-Lok 406 used?
It is commonly used in architectural buildings, residential metal roofing, and commercial roofing systems.
Are Klip-Lok panels strong?
Yes. The standing seam rib design provides strong structural rigidity and reliable roofing performance.
Conclusion
Klip-Lok 406 panels are a concealed-fix standing seam roofing system widely used in architectural and commercial construction. The standing seam ribs and concealed clip fixing system provide excellent weather resistance, thermal movement capability, and structural performance.
Understanding Klip-Lok 406 panel dimensions, rib spacing, steel gauges, coil width requirements, and span capabilities is essential for engineers, contractors, and manufacturers working with standing seam roofing systems.
Roll forming machines designed for Klip-Lok 406 panel production allow manufacturers to efficiently produce durable roofing sheets used in architectural and commercial roofing projects.