Every weight band, capacity class, and rate the free calculators use is synthesized from public sources, and the tables are published here so you can check them, cite them, or argue with them. If a value has no citable source, the table says so instead of inventing one.
The capacity classes the crane estimator sizes into, each anchored to a named make and model load chart (Grove, Link-Belt, National Crane) with capacity at radius.
Working wind thresholds for mobile crane picks: the common chart convention, the stop-work speed, and the high-sail-area derate, with the basis for each.
Weight bands for packaged rooftop HVAC units by cooling tonnage, from manufacturer spec sheets, used to derive pick weight when the data plate is not available.
Weight bands for condensing units and air-cooled chillers by tonnage, from manufacturer documentation.
How a steel member weight reads straight from its AISC designation (a W24x76 weighs 76 lb per foot), plus reference shapes.
Dead-load truss weights in pounds per lineal foot by chord and web size, from the SBCA table the crane estimator uses for truss package picks.
Cited weight band for glass-unit skylights plus labeled heuristics for dome units and roof curbs.
Weight bands for gaseous and diesel generators by kW and padmount transformers by kVA, from Generac, Kohler, and Vantran documentation.
Dry-weight bands for spas by seating, a per-square-foot shed heuristic, and the user-supplied rule for modular buildings.
Green wood density in pounds per cubic foot by species, plus palm trunk weights per foot, used to size tree-removal picks over structures.
Per-square and per-unit weights for shingles, drywall, and common tear-off materials, each with its citation and confidence.
The frame geometry, labor productivity, and rate constants behind the scaffold calculator, each with its citation and confidence.
Post-shore rental rates, reference shore capacity classes (never used to size a shoring design), and the engineering-required authorities.
The scissor and boom lift classes the lift calculator selects from, with working heights, platform heights, horizontal reach, and published rental bands.
Feasibility envelopes for mast climbing work platforms and cited rental bands for two-point suspended swing stages. Mast climber rental has no published rate, so it is marked quote-locally.
Nameplate running amp draws for restoration drying equipment (air movers, LGR and conventional dehumidifiers, air scrubbers, electric heat) from manufacturer spec sheets, with the NEC 80 percent continuous-load derating the power calculator packs circuits to.
These calculators produce planning estimates from published public rate schedules. They are not a formal quote. Confirm equipment, access, and pricing with a licensed operator or rental yard before you rely on any number for an estimate.