Inputs
Formula Used
1 Volume = Area × Thickness
2 Base worker-hours = Area ÷ Productivity
3 Total multiplier = Access × Type × Condition × Height × Confined × Containment × Asbestos × PPE
4 Total worker-hours = (Base worker-hours × Total multiplier) + (Setup hours per worker × Crew size)
5 Job duration = Total worker-hours ÷ Crew size
6 Waste mass = Volume × Density × (1 + Waste factor)
7 Total cost = Direct cost + Overhead + Profit
Tip: For premium bids, replace multipliers with your historical production rates.
How to Use
- Measure total boiler insulation surface area to remove.
- Enter average thickness and a realistic material density.
- Set your baseline productivity per worker for simple conditions.
- Choose access, condition, containment, and PPE that match the site.
- Enter disposal rate, overhead, and profit for your estimate.
- Click Calculate to see duration, waste mass, and costs.
- Export CSV or PDF for bids, approvals, or daily planning.
Example Data Table
| Scenario | Area (m²) | Thickness (mm) | Crew | Access | Containment | Worker-hours | Waste (kg) |
|---|---|---|---|---|---|---|---|
| Standard outage | 35 | 50 | 3 | Standard | Basic | ~33 | ~350 |
| Congested platform | 60 | 75 | 4 | Restricted | Negative pressure | ~92 | ~1,430 |
| Hard-set removal | 22 | 40 | 2 | Scaffold-heavy | Full enclosure | ~78 | ~250 |
Example values are illustrative. Your results depend on inputs and chosen options.