Typically found in the far-left column, this is the horizontal distance from the crane’s center of rotation to the center of the load.
A is the primary technical document that defines a crane's maximum safe lifting capacity under specific operating conditions. Rather than a single fixed number, it is a dynamic framework that accounts for the crane’s structural strength and stability limits, ensuring the operator stays within safe "rated capacity" to prevent catastrophic tipping or structural failure. Core Components of a Load Chart crane load chart
Look at the top row or the header of the columns to find the length of the boom you intend to use. Typically found in the far-left column, this is
The pressure on the outriggers exceeds the ground's bearing capacity, causing the crane to lean and eventually fail. Core Components of a Load Chart Look at
Most modern charts provide a "Safe Working Load" (SWL) which includes a safety margin (usually a percentage of the tipping point). This margin accounts for wind, sudden stops, and ground instability. It is the buffer zone that keeps everyone alive.
The true hero of any lift is a deceptively dull-looking document:
Measure the . → Locate this radius (e.g., 20 ft / 6 m) in the chart’s left or top row.