Corrugated roofing is used worldwide in:
Residential housing
Agricultural buildings
Industrial sheds
Emerging markets
Low-cost housing
It is one of the oldest metal roofing forms.
But corrugated is not universal.
The key variables are:
Pitch (distance between waves)
Depth (wave height)
Radius shape
Cover width
Number of corrugations
These must be defined precisely before tooling.
Corrugated profile is defined by:
Wave shape repeated across sheet width.
Critical dimensions:
✔ Pitch (center-to-center distance of waves)
✔ Depth (peak to valley height)
✔ Radius of curve
✔ Number of waves
✔ Effective cover width
Without these, the profile cannot be engineered.
Different countries use different common geometries.
Pitch: 2.67" (approx. 68 mm)
Depth: ½" (13 mm)
Cover width varies
Pitch: 76 mm
Depth: ~18 mm
76 mm pitch
18 mm depth
Very common export profile
762 mm cover
Specific proprietary geometry
Never assume corrugated means same geometry globally.
Before tooling approval, confirm:
✔ Pitch (mm or inches)
✔ Depth (mm or inches)
✔ Effective cover width
✔ Overall formed width
✔ Number of waves
✔ Edge detail (flat edge or full wave)
Small differences change developed width significantly.
Corrugated coil width depends on:
Pitch × number of waves + edge allowance.
Example:
76 mm pitch × 10 waves
= 760 mm
Add edge allowance → 800–900 mm coil
Common coil widths:
914 mm
1000 mm
1200 mm
1250 mm
Corrugated usually uses narrower coil than PBR or R-panel.
Exact developed width must be calculated.
Corrugated is often used in lighter gauges.
Typical thickness:
Residential / Emerging markets:
0.30–0.40 mm
Agricultural:
0.40–0.50 mm
Industrial:
0.50–0.70 mm
Thicker corrugated increases forming force significantly.
Machine must support:
Maximum thickness + maximum grade.
Common grades:
G250
G350
G550 possible but less common for shallow corrugated.
Higher grade increases:
Springback
Forming load
Motor requirement
Grade must be defined before machine design.
Common coatings:
Galvanized (Z coating)
Galvalume (AZ coating)
Prepainted
Corrugated often used in:
Coastal environments → require AZ coating.
Agricultural environments → corrosion resistance critical.
Coating type impacts roll finish requirement.
Corrugated wave is curved, not angular.
Wave radius must be defined.
Large radius = smoother appearance
Small radius = tighter wave
Radius influences:
Developed width
Forming load
Aesthetic performance
Never approximate radius during tooling design.
Edges can be:
✔ Half wave
✔ Full wave
✔ Flat edge
Edge detail impacts:
Overlap
Water tightness
Installation alignment
Specify clearly.
Corrugated commonly overlaps:
One full wave.
Specify:
✔ Side lap configuration
✔ Fastener spacing
✔ Sealant requirements
Incorrect overlap causes leakage.
Typical corrugated line:
10–16 forming stands
60–75 mm shafts
11–18.5 kW motor
Hydraulic stop cut
Because corrugated has gradual forming:
Forming load is usually lower than trapezoidal profiles.
However, deep corrugated increases stand requirement.
Corrugated lines often run:
20–40 m/min
Because forming geometry is smooth.
Cutting system choice determines maximum speed.
Typical tolerance:
Width ±2–3 mm
Depth ±1 mm
Length ±2–5 mm
Because corrugated often used in low-cost markets, tolerance expectations vary.
Export markets may require tighter control.
Shallow corrugated:
Lower structural capacity.
Not suitable for:
High snow load
High wind zone
Deep corrugated improves strength but increases forming complexity.
Always match geometry to climate.
Developed width calculation must include:
✔ Wave arc length
✔ Bend allowance
✔ Thickness compensation
✔ Springback correction
Corrugated arc geometry makes calculation slightly more complex than trapezoidal.
Never approximate.
African 76/18 is extremely common.
Latin America uses various pitches.
Australia uses proprietary shapes.
Always confirm market standard before tooling investment.
❌ Saying “standard corrugated”
❌ Not specifying pitch
❌ Not specifying depth
❌ Ignoring wave count
❌ Guessing coil width
❌ Not checking structural suitability
Most corrugated tooling errors begin here.
Before tooling or machine approval:
✔ Pitch defined
✔ Depth defined
✔ Wave radius defined
✔ Wave count defined
✔ Effective cover width defined
✔ Edge detail defined
✔ Thickness range defined
✔ Grade defined
✔ Coating defined
✔ Developed width calculated
✔ Coil availability confirmed
✔ Climate suitability reviewed
Only then proceed to production.
No — pitch and depth vary by region.
76/18 profile is very common globally.
Usually yes, due to smooth geometry.
Yes, often 30–40 m/min.
Shallow versions are not.
No — tooling must match exact wave geometry.
Copyright 2026 © Machine Matcher.