Heat Treatment, Furnaces & Thermal Processing worked example

Fixture Load Capacity at 14% loading allowance for fixturing and inspection: a worked example

What does the result look like when loading allowance for fixturing and inspection reaches 14%? The full calculation is worked below with real intermediate numbers. Use it when baskets, grids, trays, pins, racks, or hearth fixtures must be planned before furnace loading.

The inputs for this scenario

  • Fixture loads to rack before the run: 30 fixtures (unchanged)
  • Fixtures racked per labor-hour: 6 fixtures / hr (unchanged)
  • Loading allowance for fixturing and inspection: 14 % (raised for this scenario; the documented default is 12)

Working through the calculation

  • Applying the documented formula (Base fixture loading hours = fixtures or loads to prepare รท fixture loading rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 5.7 hr for required fixture loading time, the number this scenario is built around.
  • At this operating point the engine returns 5 hr for base fixture loading hours.
  • At this operating point the engine returns 14 % for fixture allowance applied.
  • At this operating point the engine returns 6 fixtures / hr for fixture loading rate.

How this compares with the baseline

  • Against the tool's baseline example, where loading allowance for fixturing and inspection sits at 12% and the headline result is 5.6 hr, this scenario comes in 1.79% above the baseline at 5.7 hr.
  • A figure at this level is achievable when loading allowance for fixturing and inspection is genuinely sustained, not just peaked for a shift. It assumes a steady racking rate; mixed part geometries, masking-heavy aerospace work, or fragile thin-wall parts can blow the average rate apart, so set the rate from your slowest representative fixture, not your fastest.

Results at a glance

  • Required fixture loading time: 5.7 hr (headline result)
  • Base fixture loading hours: 5 hr
  • Fixture allowance applied: 14 %
  • Fixture loading rate: 6 fixtures / hr

Run it with your numbers

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

Last reviewed 2026-05-12.