Crane Mat Sizing

Estimate minimum contact area from leg load and soil capacity:

Outrigger Force (kN)

Allowable Soil Pressure (kPa)

Suggested Dimension1.32 m × 1.32 m

Point Load & Pressure

Pad ground bearing pressure calculations:

Outrigger Force (kN)

Width (m)

Length (m)

Pad Surface Area1.44 m²

Chart Utilization

% of WLL

Current Total Load

Max Rated Load

0%90%100%130%

—enter a positive WLL

Minimum WLL Required

Find minimum capacity rating needed for your load:

Load + Rigging (T)

Do not exceed %

How this calculator works

Estimate the minimum bearing area and square-side or round-diameter suggestion from a verified outrigger reaction and allowable ground pressure.

FormulaMinimum bearing area = outrigger force ÷ allowable ground pressure

What this assumes

The reaction is the maximum verified force on the individual outrigger.
Ground pressure is an allowable value provided by a competent source.
The suggested dimensions describe ground contact area only.

What it does not cover

Mat structural design or manufacturer capacity
Layered mats and load-spread angles
Local ground variability, services and voids

Crane Mat Size Calculator

Crane Mat Sizing

Point Load & Pressure

Chart Utilization

Minimum WLL Required

How this calculator works

What this assumes

What it does not cover

Crane Mat Size Calculator

Crane Mat Sizing

Point Load & Pressure

Chart Utilization

Minimum WLL Required

How this calculator works

What this assumes

What it does not cover

Crane Mat Size Calculator

Crane Mat Sizing

Point Load & Pressure

Chart Utilization

Minimum WLL Required

How this calculator works

What this assumes

What it does not cover

Other free calculators

Ground Bearing Pressure

Outrigger Reaction

Sling Angle Load

Crane Mat Size Calculator

Crane Mat Sizing

Point Load & Pressure

Chart Utilization

Minimum WLL Required

How this calculator works

What this assumes

What it does not cover

Other free calculators

Ground Bearing Pressure

Outrigger Reaction

Sling Angle Load