IPAF-Aligned Methodology
BS 7121 · LOLER · PUWER · 20% Safety Headroom
BS 7121 · LOLER · PUWER · 20% Safety Headroom
Pad Size Calculator
Find the Right Pad
Find the Right Pad
For Your Lift
Enter your maximum outrigger load and ground type. We'll calculate the minimum pad area required and recommend the right CPS pad from our range. Ground bearing values aligned with IPAF technical guidance.
1Load
2Ground Type
3Result
Maximum Load Per Outrigger
Use the maximum outrigger load from your crane's load chart at the intended radius. If unsure, divide gross vehicle weight by the number of outriggers.
Tonnes
Enter the load in tonnes (e.g. 12 for a 12-tonne outrigger load)
Ground Type
Select the ground type at your outrigger positions. If conditions vary across the site, use the weakest ground type.
Your Result
— T on — (— kN/m²)
Recommended Pad Area
— m²
20% safety headroom built in · Strict min: — m²
Recommended Square Side
— mm
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Still not sure which pad fits your job?
Ground conditions vary. If your outrigger load is on the edge of a rating, or the ground type isn't a clean match, we'll help you pick the right pad.
Already have a pad? Check if it keeps ground pressure within safe limits with the Ground Bearing Calculator.
Ground Bearing Check →
Disclaimer: This calculator provides indicative guidance only, based on IPAF ground bearing values. It does not replace a lift plan, crane manufacturer instructions, or assessment by a qualified Appointed Person. Ground conditions can vary significantly across a site and should be verified before lifting operations begin. For project-specific advice, call 07752 806706.