Scaffold Erection Time Calculator
Labor hours from scaffold size and configuration.
About this calculator
Crew Size only ever changes how the same total labor is scheduled, never how much labor there is. Erection Labor-Hours, Dismantle Labor-Hours, and Total Labor-Hours are all fixed by the frame count, lift count, cross braces, planks, and scaffold height -- Crew Size never appears in any of those formulas -- so a 2-person and a 20-person crew are estimated to spend the identical total labor-hours erecting the same scaffold. What Crew Size does move is Erection Calendar Days and Dismantle Calendar Days, which divide the fixed labor-hour totals by Crew Size x 8-hour days: doubling the crew roughly halves the calendar time, monotonically across the full 2-20 worker range.
Total Frames drives the largest share of labor directly, with each successive lift (tier) adding a cumulative 15% handling penalty on top of the base 0.5 hours/frame rate for hoisting materials higher. Scaffold Height applies its own separate step-function premium on top of everything else -- unchanged below 40 ft, +20% from 40-80 ft, +40% above 80 ft -- so Erection Labor-Hours rises with height in flat steps rather than a smooth curve. Dismantling is modeled as a fixed 65% of whatever the erection total comes out to, so anything that raises erection hours raises dismantle hours by the same proportion.
Inputs
Results
Erection labor-hours
33.5
Total labor-hours (erect + dismantle)
55.3
How to Use This Calculator
- Enter the total number of frames, lifts (tiers), cross braces, and planks/decks.
- Set crew size (number of workers).
- Review erection labor hours and days based on standard production rates.
- Check dismantling hours (typically 60-70% of erection time) and total project labor hours.
- Add safety inspection time and material handling time to your crew scheduling plan.
How the result changes with Total frames
| Total frames | Erection labor-hours | Total labor-hours (erect + dismantle) |
|---|---|---|
| 20 | 20.7 | 34.1 |
| 30 | 27.1 | 44.7 |
| 60 | 46.3 | 76.5 |
| 100 | 72.1 | 118.9 |
What each input means
- Total frames
- Total number of scaffold end frames to erect.
- Number of lifts (tiers)
- Vertical tiers of scaffold. Upper lifts take longer due to hoisting.
- Cross braces
- Number of X-braces to install.
- Planks / decks
- Number of scaffold planks to place.
- Crew size (workers)
- Number of scaffold erectors. Minimum 2 per OSHA.
- Total scaffold height (ft)
- Height determines if a hoisting premium applies (>40 ft: +20%, >80 ft: +40%).
What each result means
- Erection labor-hours
- Total labor-hours to erect the scaffold.
- Dismantle labor-hours
- Estimated labor-hours to dismantle (65% of erection).
- Total labor-hours (erect + dismantle)
- Combined erection and dismantling labor.
- Erection calendar days
- Working days to erect based on crew size and 8-hour days.
- Dismantle calendar days
- Working days to dismantle based on crew size.
- Hours per frame (erection)
- Average labor-hours per frame including all components.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersTotal frames = 40, Number of lifts (tiers) = 4, Cross braces = 60, Planks / decks = 20 = 6 input(s) provided
- Calculate Erection labor-hoursErection labor-hours = (frameLaborHours + braceLaborHours + plankLaborHours + guardrailHours) * heig...33.5 = 33.5
- Calculate Total labor-hoursTotal labor-hours = totalErectionHours + dismantleHours55.3 = 55.3
- Calculate Dismantle labor-hoursDismantle labor-hours = totalErectionHours * 0.6521.8 = 21.8
- Calculate Erection calendar daysErection calendar days = totalErectionHours / (crewSize * 8)1 = 1
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
If I add more workers, does the total labor-hours estimate go down?
No -- Erection Labor-Hours and Total Labor-Hours are fixed by the scaffold's frame count, lifts, braces, planks, and height; Crew Size never enters those formulas at all. Adding workers only shortens the calendar time (Erection Calendar Days) needed to burn through the same fixed total, since more people work the same hours in parallel.
Does doubling the crew size cut the project schedule in half?
Approximately, yes -- Erection Calendar Days is Total Erection Hours divided by Crew Size times an 8-hour day, so it falls monotonically as Crew Size rises across the full 2-20 worker range. It's a straightforward inverse relationship, not a diminishing- returns curve, in this simplified model.
Why does labor jump at 40 ft and 80 ft instead of increasing smoothly with height?
The height premium is modeled as a step function, not a continuous rate: no premium below 40 ft, a flat +20% for scaffolds between 40 and 80 ft, and +40% above 80 ft, reflecting the added material-hoisting time at those thresholds. That means two scaffolds at 41 ft and 79 ft get the same +20% multiplier despite the height difference, while crossing from 79 to 81 ft jumps the multiplier again.
Why does dismantle time track erection time so closely?
Dismantle Labor-Hours is calculated as a flat 65% of whatever Erection Labor-Hours comes out to, rather than from its own independent formula -- so any input that raises or lowers erection time (frame count, lifts, height, and so on) moves dismantle time by exactly the same proportion.
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