Crane Ground Bearing Pressure and Mat Size
Outrigger / crawler ground bearing pressure vs an allowable soil bearing, the area required to pass, and the square mat or cribbing side. A geotech source and a qualified person govern.
Formula and source
gbp = reaction / bearing_area; required_area = reaction / allowable; mat_side = sqrt(required_area); pass = gbp <= allowable.
OSHA 29 CFR 1926 Subpart CC and the manufacturer's outrigger-reaction chart by name; first-principles pressure = force / area.
Audience
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Posture
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