30/200 Box Rib Panel Dimensions, Rib Spacing, Gauge Range, and Span Tables
30/200 Box Rib Panel Dimensions, Rib Spacing and Span Tables
The 30/200 Box Rib Panel is a trapezoidal metal roofing and wall cladding profile designed for light to medium industrial buildings, commercial structures, and agricultural applications. The profile features evenly spaced trapezoidal ribs that increase the structural stiffness of the sheet while maintaining efficient drainage and easy installation.
The designation 30/200 refers to the profile geometry:
• 30 mm rib height
• 200 mm rib pitch (center-to-center spacing)
This configuration provides a balanced combination of structural strength, material efficiency, and manufacturing simplicity.
30/200 box rib panels are commonly used in:
• warehouses
• commercial buildings
• agricultural structures
• factories
• storage buildings
• wall cladding systems
These panels are manufactured using roll forming machines that shape steel coil into trapezoidal ribs through multiple forming stations. Roll forming allows panels to be produced in long custom lengths to suit roof dimensions.
This guide provides a detailed technical overview of 30/200 box rib panel dimensions, rib spacing, steel gauges, coil width requirements, and span tables used by engineers, contractors, manufacturers, and roll forming machine buyers.
What is a 30/200 Box Rib Panel
A 30/200 box rib panel is a trapezoidal metal roofing sheet designed with structural ribs that increase the rigidity of the panel.
Compared with traditional corrugated panels, box rib profiles offer:
• improved structural stiffness
• greater span capability
• better water drainage
• consistent panel alignment
Because of these features, box rib panels are widely used in modern metal building systems.
Standard 30/200 Box Rib Panel Dimensions
30/200 box rib panels contain several trapezoidal ribs distributed across the panel width.
Typical dimensions include:
Specification
Typical Measurement
Coverage Width
900 – 1000 mm
Overall Width
1000 – 1080 mm
Rib Height
30 mm
Rib Pitch
200 mm
Number of Ribs
5
Panel Length
Custom roll formed
Coverage width refers to the effective installed width of the panel.
Rib Layout and Profile Geometry
The trapezoidal rib layout provides reinforcement across the panel surface.
Typical rib layout characteristics include:
• trapezoidal ribs
• flat pan sections between ribs
• anti-capillary side lap
Typical rib dimensions include:
Feature
Measurement
Rib height
30 mm
Rib pitch
200 mm
Rib top width
40 – 60 mm
Rib base width
120 – 140 mm
The rib pattern increases panel stiffness and strength.
30/200 Box Rib Panel Cross Section Dimensions
The cross section of the panel consists of trapezoidal ribs separated by flat pans.
Typical cross section characteristics include:
Rib height
30 mm
Panel coverage width
900 – 1000 mm
Number of ribs
5 ribs
Side lap
1 rib overlap
The side lap ensures a watertight roofing system.
Steel Gauge Range for 30/200 Box Rib Panels
30/200 box rib panels are typically produced using light to medium steel gauges.
Typical gauges include:
Gauge
Thickness
Typical Application
29 gauge
0.0142 in
Agricultural buildings
26 gauge
0.0179 in
Commercial roofing
24 gauge
0.0239 in
Industrial buildings
22 gauge
0.0299 in
Heavy-duty roofing
Thicker gauges provide increased structural performance.
30/200 Box Rib Panel Span Tables
Span tables determine the maximum distance the panel can span between supports.
Span capability depends on:
• steel thickness
• rib height
• rib spacing
• wind loads
• snow loads
Typical span ranges include:
Gauge
Roof Span
29 gauge
3 – 4 ft
26 gauge
4 – 6 ft
24 gauge
6 – 8 ft
22 gauge
8 – 10 ft
Engineering calculations should always be performed for specific building conditions.
Coil Width Requirements for 30/200 Box Rib Panels
Steel coil must be slit to the correct width before entering the roll forming machine.
Typical coil widths include:
Panel Coverage
Coil Width
900 mm panel
1100 – 1150 mm coil
1000 mm panel
1200 – 1250 mm coil
Additional material is required to form the trapezoidal ribs during the roll forming process.
Materials Used for 30/200 Box Rib Panels
30/200 box rib 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 due to its excellent corrosion resistance.
Industries Using 30/200 Box Rib Panels
30/200 box rib panels are widely used across several construction sectors.
Typical applications include:
Industrial buildings
Warehouses
Agricultural buildings
Factories
Commercial buildings
Metal wall cladding systems
The profile is commonly used in metal building construction.
Roll Forming Machines Used to Produce 30/200 Box Rib Panels
30/200 box rib panels are produced using roll forming machines designed for trapezoidal roofing profiles.
Typical machine specifications include:
Number of forming stations
16 – 22 stations
Roller material
Hardened tool steel
Machine speed
15 – 35 meters per minute
Drive system
Chain drive or gearbox drive
Cutting system
Hydraulic shear or flying shear
Control system
PLC automatic length control
These machines allow efficient production of roofing sheets.
Installation Considerations
Correct installation ensures long-term roofing performance.
Important installation factors include:
Correct panel overlap
Fastener placement on rib peaks
Roof slope requirements
Sealing of side laps
Panels are typically overlapped by one rib.
Engineering Load Considerations
Engineers designing roofing systems using box rib panels must consider:
Wind uplift loads
Snow loads
Thermal expansion
Structural support spacing
These panels are typically installed over steel purlins.
Common Manufacturing Problems
Manufacturing issues may occur if roll forming machines are not correctly adjusted.
Common problems include:
Incorrect rib height
Uneven rib spacing
Panel waviness
Side lap misalignment
These problems can usually be corrected by adjusting roll tooling alignment.
Frequently Asked Questions
What does 30/200 box rib panel mean?
The designation refers to 30 mm rib height and 200 mm rib spacing.
What gauges are used for 30/200 box rib panels?
Common gauges include 29, 26, 24, and 22 gauge steel.
Where are 30/200 box rib panels used?
They are commonly used for industrial buildings, warehouses, agricultural buildings, and metal wall cladding systems.
Are 30/200 box rib panels strong?
Yes. The trapezoidal rib design increases structural rigidity compared with traditional corrugated sheets.
What coil width is required for 30/200 box rib panels?
Typical coil widths range between 1100 mm and 1250 mm depending on panel design.
Conclusion
30/200 box rib panels are a versatile trapezoidal metal roofing and cladding profile designed for commercial and industrial construction. The rib geometry provides improved structural strength, efficient drainage, and reliable performance in a wide range of building applications.
Understanding 30/200 box rib panel dimensions, rib spacing, steel gauges, coil width requirements, and span capabilities is essential for engineers, contractors, and manufacturers working with metal roofing systems.
Roll forming machines designed for 30/200 box rib panel production allow manufacturers to efficiently produce durable roofing sheets for industrial and commercial construction projects.