Pultrusion & Continuous Composite Profiles worked example

Glass Loading at 65% line uptime: a worked example

This worked example runs the glass loading numbers for a tougher week than the baseline: 65% line uptime instead of the typical 90%. Glass Loading capacity estimates how many good, fully-reinforced pultruded profiles a line can deliver once you account for downtime and cure yield.

The inputs for this scenario

  • Profiles pulled per die cycle: 4 units / cycle (held at the documented default)
  • Available die cycles in the period: 480 cycles (held at the documented default)
  • Line uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • Cured-profile yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross glass loading capacity = units per cycle × available cycles.
  • Good output capacity works out to 1,211 units at these inputs, and this is the headline figure for the scenario.
  • Gross capacity works out to 1,920 units at these inputs.
  • Uptime loss works out to 672 units at these inputs.
  • Yield loss works out to 37.44 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where line uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 27.78% below the baseline at 1,211 units.
  • Use it when planning a run or quoting a delivery date and you need a defensible good-output number rather than a theoretical maximum. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Good output capacity: 1,211 units (headline result)
  • Gross capacity: 1,920 units
  • Uptime loss: 672 units
  • Yield loss: 37.44 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Glass Loading calculator, set line uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.