How do you calculate field erection labor hours?

Divide the erection workload by the completion rate, then multiply by one plus the allowance. For 120 units at 12 units/hr with a 10% allowance, base labor is 10 hours and required labor is 11 hours.

What is a realistic field delay allowance?

On open cryogenic field work, 10-25% is common to cover crane waits, weather, and material handling; the 10% default is a lean, well-organized site. Congested or winter sites push higher.

Why add an allowance instead of just using the productivity rate?

Shop or estimated rates assume continuous work. Field reality adds non-productive time the rate never captures, so the allowance converts ideal hours into hours you can actually schedule and bill.

Does this cover rigging and crane time?

Only if your completion rate already reflects rigging-paced work. If the crane is a separate critical resource, model its hours separately and use this for the erection crew.

Should I protect the vacuum jacket during erection?

Yes, and the handling care that requires is exactly why cold-service erection runs slower than warm equipment; bake that caution into a lower completion rate or a higher allowance.

How do I convert hours to crew days?

Divide the required hours by crew size and shift length. The 11-hour result is just over one 8-hour shift for a single-position crew.

Cryogenic Storage & LNG Equipment calculator

Field Erection Labor Calculator

Field erection labor estimates the crew hours needed to set, align, and connect cryogenic and LNG equipment on site. Construction superintendents and project schedulers use it when planning a tank-farm install, a cold-box setup, or a vaporizer skid placement, where rigging, jacket-vacuum protection, and tight alignment tolerances slow the work. Because field conditions add weather, crane waits, and material-handling delays that a shop never sees, the raw productivity rate alone always understates the real labor. This calculator adds a field allowance so the labor estimate survives contact with the job site.

What this calculator does

Estimate field labor hours for erecting cryogenic tanks, LNG skids, vacuum-jacketed piping, vaporizers, or transfer equipment.
Use it when field erection labor in cryogenic storage and lng equipment needs a defensible run time before a quote goes out.
It computes base erection labor as workload divided by completion rate, then scales it up by a field delay and handling allowance.

Formula used

Base erection labor = cryogenic equipment erection workload ÷ field erection completion rate
Required field erection labor = base erection labor × allowance factor

Inputs explained

Cryogenic equipment erection workload:
Field erection completion rate:
Field delay and handling allowance:

How to use the result

Use it when building a field labor budget or schedule for installing cryogenic equipment.
It uses one blended completion rate, so a job mixing quick pipe-rack sets with a slow cold-box alignment needs to be split into separate runs.

Current U.S. benchmarks

Global copper trades at $13,484 per tonne (IMF via FRED, May 2026), up 41.5% in a year, and U.S. industrial electricity averages 8.66 cents per kWh. Both feed electrified-hardware unit economics.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate field erection labor hours? Divide the erection workload by the completion rate, then multiply by one plus the allowance. For 120 units at 12 units/hr with a 10% allowance, base labor is 10 hours and required labor is 11 hours.
What is a realistic field delay allowance? On open cryogenic field work, 10-25% is common to cover crane waits, weather, and material handling; the 10% default is a lean, well-organized site. Congested or winter sites push higher.
Why add an allowance instead of just using the productivity rate? Shop or estimated rates assume continuous work. Field reality adds non-productive time the rate never captures, so the allowance converts ideal hours into hours you can actually schedule and bill.
Does this cover rigging and crane time? Only if your completion rate already reflects rigging-paced work. If the crane is a separate critical resource, model its hours separately and use this for the erection crew.
Should I protect the vacuum jacket during erection? Yes, and the handling care that requires is exactly why cold-service erection runs slower than warm equipment; bake that caution into a lower completion rate or a higher allowance.

Last reviewed 2026-05-12.