Bulk Solids, Mining, Aggregates & Material Processing worked example

Belt Load at 14% run-time allowance for slowdowns: a worked example

Push run-time allowance for slowdowns up to 14% and the picture changes. This example computes every intermediate figure at that operating point. a plant team is reviewing belt load for bulk solids, mining, aggregates, and material processing and needs a clear belt load for production, quality, capacity, maintenance, purchasing, or costing decisions

The inputs for this scenario

  • Tonnage to convey: 1,200 tons (unchanged)
  • Belt sustained haulage rate: 150 tons / hr (unchanged)
  • Run-time allowance for slowdowns: 14 % (raised for this scenario; the documented default is 12)

Working through the calculation

  • Applying the documented formula (Base belt load = belt load workload รท belt load completion rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 9.12 hr for belt load, the number this scenario is built around.
  • At this operating point the engine returns 8 hr for base belt load.
  • At this operating point the engine returns 14 % for belt load allowance.
  • At this operating point the engine returns 150 pieces / min for belt load completion rate.

How this compares with the baseline

  • Against the tool's baseline example, where run-time allowance for slowdowns sits at 12% and the headline result is 8.96 hr, this scenario comes in 1.79% above the baseline at 9.12 hr.
  • It divides the tonnage to convey by the sustained haulage rate to get base hours, then inflates that by an allowance factor for real-world slowdowns. 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

  • Belt Load: 9.12 hr (headline result)
  • Base belt load: 8 hr
  • Belt Load allowance: 14 %
  • Belt Load completion rate: 150 pieces / min

Run it with your numbers

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

Last reviewed 2026-05-12.