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Calcimator

Steel Erection Sequence Calculator

Plan steel erection duration, crane picks per day, crew sizing, and crane utilization based on tonnage, piece count, and crane capacity.

Inputs

tons
tons
ft

Results

Estimated Erection Days

7 days

Picks per Day27
Total Pieces180
Avg Piece Weight1,111 lbs
Tons per Day14.3 tons/day
Crane Utilization70%
Minimum Crew Size7 workers
Overweight Pieces0
How to Use This Calculator
  1. Enter the total steel tonnage, number of floors, and average pieces per floor.
  2. Set the crane capacity in tons at the working radius and the average pick distance in ft.
  3. Read Picks per Day and Estimated Erection Days to build the project schedule.
  4. Check Avg Piece Weight (lbs) — if it approaches the crane capacity, a larger crane or rigging plan is needed.
  5. Use Minimum Crew Size and Crane Utilization (%) to optimize labor deployment.
  6. Review Tons per Day to benchmark against typical steel erection productivity of 4–12 tons/day.

How the result changes with Pieces per Floor

Pieces per FloorEstimated Erection Days
50156 days
1,751195 days
3,250362 days
4,500500 days

What each input means

Total Steel Tonnage
Total structural steel tonnage to erect.
Number of Floors
Number of floors/levels in the structure.
Pieces per Floor
Average number of steel pieces (beams, columns, braces) per floor.
Crane Capacity
Maximum crane lifting capacity at working radius.
Average Pick Distance
Average horizontal distance from crane to pick/set point.

What each result means

Estimated Erection Days
Estimated working days to complete steel erection.
Picks per Day
Expected crane picks per 8-hour work day.
Total Pieces
Total steel pieces across all floors.
Avg Piece Weight
Average weight per steel piece.
Tons per Day
Average tonnage erected per day.
Crane Utilization
Estimated productive crane utilization percentage.
Minimum Crew Size
Minimum erection crew (operator, connectors, bolt-up, foreman).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Total Steel Tonnage = 100, Number of Floors = 3, Pieces per Floor = 60, Crane Capacity = 25 = 5 input(s) provided
  2. Calculate Estimated Erection Days
    Estimated Erection Days
    7 = 7
  3. Calculate Picks per Day
    Picks per Day
    27 = 27
  4. Calculate Total Pieces
    Total Pieces
    180 = 180

Engine last updated . Checked against 3 independently-derived tests — how we verify calculators.

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