Forklifts, Lift Equipment & Material Handling Vehicles worked example

Mast Load Margin with available rated or residual capacity of 12,500 lb: a worked example

Push available rated or residual capacity up to 12,500 lb and the picture changes. This example computes every intermediate figure at that operating point. Use it when checking whether a forklift, reach truck, telehandler, mast, carriage, or attachment setup has enough capacity for a known load, load center, and lift condition.

The inputs for this scenario

  • Available rated or residual capacity: 12,500 lb (raised for this scenario; the documented default is 5,000)
  • Required load weight: 4,200 lb (unchanged)
  • Capacity reference basis: 5,000 lb (unchanged)

Working through the calculation

  • Applying the documented formula (Mast Load Margin gap = available rated or residual capacity - required load weight) to the inputs above produces each figure below.
  • At this operating point the engine returns 166 % for mast load margin margin, the number this scenario is built around.
  • At this operating point the engine returns 8,300 value for mast load margin gap.
  • At this operating point the engine returns 12,500 value for available rated or residual capacity.
  • At this operating point the engine returns 4,200 value for required load weight.

How this compares with the baseline

  • Against the tool's baseline example, where available rated or residual capacity sits at 5,000 lb and the headline result is 16 %, this scenario comes in 938% above the baseline at 166 %.
  • It computes the gap between available capacity and required load weight, then expresses that gap as a percentage margin against a chosen capacity basis. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Mast Load Margin margin: 166 % (headline result)
  • Mast Load Margin gap: 8,300 value
  • Available rated or residual capacity: 12,500 value
  • Required load weight: 4,200 value

Run it with your numbers

  • Every input above is editable in the live Mast Load Margin calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.