13/3 Corrugated Panel Dimensions, Rib Spacing, Gauge Range, and Span Tables
13/3 Corrugated Panel Dimensions, Rib Spacing and Span Tables
13/3 Corrugated panels are one of the most traditional and widely used metal roofing and cladding profiles worldwide. The profile is defined by its corrugation pitch and depth, producing a continuous wave pattern that provides structural strength and excellent water drainage.
The “13/3” designation typically refers to the corrugation pitch of approximately 3 inches with a rib height around 13 mm (½ inch), although exact measurements may vary slightly depending on the manufacturer and region.
Corrugated panels have been used for more than a century and remain extremely popular due to their simplicity, strength, and ease of manufacturing.
13/3 corrugated metal panels are commonly used for:
• agricultural buildings
• residential roofing
• industrial roofing
• wall cladding
• sheds and storage buildings
• fencing and siding
These panels are manufactured using roll forming machines that shape flat steel coil into a repeating sinusoidal corrugated pattern. The roll forming process allows panels to be produced in continuous lengths to match roof dimensions.
This guide provides a detailed technical overview of 13/3 corrugated panel dimensions, rib spacing, steel gauges, coil width requirements, and engineering span tables used by manufacturers, contractors, and roll forming machine buyers.
What is a 13/3 Corrugated Panel
A 13/3 corrugated panel is a metal roofing and cladding profile formed with repeating curved corrugations that increase the structural rigidity of the sheet.
Unlike box profile panels that use square ribs, corrugated sheets use a smooth wave pattern. This design distributes loads across the sheet and allows thinner metal gauges to maintain structural strength.
Corrugated roofing is widely used because it offers several advantages:
• simple manufacturing process
• high strength-to-weight ratio
• efficient water drainage
• low production cost
• easy installation
Because of these benefits, corrugated panels are one of the most widely produced roofing profiles globally.
Standard 13/3 Corrugated Panel Dimensions
Corrugated sheets are available in several widths depending on the number of corrugations across the panel.
Typical 13/3 corrugated panel dimensions include:
Specification
Typical Measurement
Coverage Width
762 – 990 mm
Overall Width
820 – 1060 mm
Rib Height
13 mm
Rib Pitch
76 mm (3 inches)
Number of Corrugations
10 – 14
Panel Length
Custom roll formed
Corrugated sheets are usually produced in standard lengths or custom lengths depending on project requirements.
Corrugation Rib Layout
The corrugation layout of the panel forms a repeating wave pattern that increases the structural strength of the sheet.
Typical characteristics include:
• sinusoidal wave pattern
• evenly spaced corrugations
• overlapping edge design
Typical corrugation dimensions:
Feature
Measurement
Corrugation pitch
76 mm
Corrugation height
13 mm
Corrugation radius
varies by tooling
This design improves water drainage and helps distribute loads across the panel.
13/3 Corrugated Panel Cross Section Dimensions
The cross section of corrugated panels is formed using a series of curved rolls that gradually shape the metal sheet.
Typical cross section features include:
Corrugation height
13 mm
Corrugation pitch
76 mm
Panel overlap
1 corrugation
Panel coverage width
Approximately 762 – 990 mm depending on design.
The overlap between panels helps prevent water penetration at the panel joints.
Steel Gauge Range for 13/3 Corrugated Panels
Corrugated panels are typically produced using lighter steel gauges compared with structural roofing panels.
Common steel gauges include:
Gauge
Thickness
Typical Application
29 gauge
0.0142 in
Agricultural buildings
28 gauge
0.0157 in
Residential roofing
26 gauge
0.0179 in
Commercial roofing
24 gauge
0.0239 in
Industrial buildings
Lighter gauges are commonly used for agricultural buildings, while thicker gauges are used for commercial applications.
13/3 Corrugated Panel Span Tables
Span tables indicate the maximum distance the panel can span between structural supports.
Span capability depends on:
• steel thickness
• panel width
• corrugation depth
• wind loads
• snow loads
Typical span ranges include:
Gauge
Roof Span
29 gauge
2 – 3 ft
26 gauge
3 – 4 ft
24 gauge
4 – 5 ft
Actual span requirements must be determined by engineers based on project conditions.
Coil Width Requirements for 13/3 Corrugated Panels
Steel coil must be slit to the correct width before entering the roll forming machine.
Typical coil widths include:
Panel Coverage
Coil Width
762 mm panel
820 – 840 mm coil
914 mm panel
980 – 1000 mm coil
990 mm panel
1040 – 1060 mm coil
Additional width is required to account for the corrugation forming process.
Proper coil width ensures correct panel coverage after roll forming.
Materials Used for Corrugated Panels
Corrugated panels can be manufactured using several types of metal depending on environmental conditions and building requirements.
Common materials include:
Galvanized steel
Galvalume steel
Aluminum
Painted steel
Galvalume steel is widely used because of its excellent corrosion resistance and long service life.
Industries Using 13/3 Corrugated Panels
Corrugated roofing systems are widely used across many industries due to their simplicity and durability.
Common applications include:
Agricultural buildings
Warehouses
Residential homes
Industrial buildings
Farm sheds
Fencing and siding
These panels are particularly popular in developing construction markets due to their low manufacturing cost.
Roll Forming Machines Used to Produce 13/3 Corrugated Panels
13/3 corrugated panels are produced using roll forming machines designed specifically for corrugated profiles.
Typical machine specifications include:
Number of forming stations
16 – 22 stations
Roller material
Hardened tool steel
Machine speed
20 – 40 meters per minute
Drive system
Chain drive or gearbox drive
Cutting system
Hydraulic shear or flying shear
Control system
PLC automatic length control
Corrugated roll forming machines are among the most widely used roofing panel machines worldwide.
Installation Considerations
Proper installation is essential to ensure the performance of corrugated roofing systems.
Important installation factors include:
Correct panel overlap
Proper fastener spacing
Roof slope requirements
Sealing of panel joints
Panels are typically overlapped by one corrugation to prevent water penetration.
Engineering Load Considerations
When designing corrugated roofing systems, engineers must consider structural factors including:
Wind uplift loads
Snow loads
Roof slope requirements
Thermal expansion
Corrugated panels are often installed over purlins or structural supports depending on the building design.
Common Manufacturing Problems
Manufacturing issues can occur if roll forming machines are not properly adjusted.
Common problems include:
Panel waviness
Incorrect corrugation height
Uneven corrugation spacing
Panel edge distortion
These issues can usually be corrected by adjusting roll tooling alignment and forming pressure.
Frequently Asked Questions
What does 13/3 corrugated mean?
13/3 typically refers to corrugation height and pitch, commonly meaning a rib height of around 13 mm with a pitch of approximately 3 inches.
What gauge steel is used for corrugated roofing?
Common gauges include 29, 28, 26, and 24 gauge steel.
What is the coverage width of corrugated panels?
Typical coverage widths range between 762 mm and 990 mm depending on the number of corrugations.
Where are corrugated panels commonly used?
They are widely used for agricultural buildings, warehouses, residential roofing, and industrial structures.
Are corrugated panels strong enough for roofing?
Yes. The corrugated wave pattern provides structural strength and allows the panel to span between supports.
Conclusion
13/3 corrugated panels are one of the most widely used metal roofing and cladding profiles in the world. Their simple design, strong structural performance, and efficient manufacturing process make them an ideal roofing solution for agricultural, residential, and industrial buildings.
Understanding 13/3 corrugated panel dimensions, rib spacing, steel gauges, coil width requirements, and span capabilities is essential for contractors, manufacturers, and engineers working with corrugated metal roofing systems.
Roll forming machines designed for 13/3 corrugated panel production allow manufacturers to produce durable roofing panels efficiently while maintaining consistent profile accuracy.