Crane Setup and Configuration
Setup is a capacity decision
The load chart is valid only for the configuration actually on the crane. Setup and configuration include outrigger spread (full, partial, or retracted), blocking and mats, level condition, boom length and telescoping mode, jib stowed or erected, counterweight, auxiliary head, number of parts of line, and tire pressure for on-rubber work. Ground bearing pressure depends on crane weight plus load, outrigger reactions, and pad area; use mats or cribbing to spread pressure and verify that underground voids are not present. Assemble per the manufacturer, with pins, keepers, and locks secured. Never assume "full outriggers" if floats are not extended or beams are not pinned.
Traps
Partial-outrigger charts have lower capacity and may require further reductions. On-rubber charts are separate and usually much lower. Radius is measured from the crane's center of rotation, or boom pivot according to the chart, to the hook-not from the outrigger. Counterweight and jib configurations change charts; a stowed jib may still add weight. "Level" means within the manufacturer's tolerance, not merely looking level. Asymmetric outrigger setups are generally not permitted unless the manufacturer provides a chart.
Worked example
A chart shows 14,000 lb at a 20 ft radius with full outriggers and the jib stowed. If the jib is erected or an outrigger beam is not fully extended, that 14,000 lb value no longer applies. Re-enter the chart using the actual configuration.