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Calcimator

Flying Form Design Calculator

Calculate table form dimensions, weight, crane requirements, and cycle time.

Inputs

Results

Table area (sf)

714

Table width (ft)25.5
Table length (ft)28
Table weight (lbs)9,996
Crane pick (tons)5.5
Total load on table (lbs)117,096
Concrete per bay (cy)20.7
Cycle time (days)1.3
Est. project duration (days)13
Labor savings vs conventional (%)50
Table Weight Tons5
How to Use This Calculator
  1. Enter Bay Width and Bay Length in feet along with Slab Thickness in inches.
  2. Enter the Story Height and total Number of Floors to estimate the full project scope.
  3. Review Table Area, Table Weight, and Crane Pick weight in tons to verify crane capacity.
  4. Check Cycle Time in days and Total Project Duration to schedule the pour sequence.
  5. Use Labor Savings vs Conventional to justify the investment in flying form systems.

How the result changes with Bay width (ft)

Bay width (ft)Table area (sf)
10210
21518
35910
461,218

What each input means

Bay width (ft)
Width of the structural bay (column-to-column).
Bay length (ft)
Length of the structural bay (column-to-column).
Slab thickness (in)
Thickness of the concrete slab.
Story height (ft)
Floor-to-floor height for the flying form legs.
Number of floors
Total number of elevated slabs to form.
Form weight (psf)
Weight of the flying form table per square foot. Typical: 12-18 psf.

What each result means

Table width (ft)
Flying form table width (bay width minus clearance).
Table length (ft)
Flying form table length (bay length minus clearance).
Table area (sf)
Surface area of one flying form table.
Table weight (lbs)
Weight of one flying form table.
Crane pick (tons)
Total crane pick weight including rigging (10% added).
Total load on table (lbs)
Combined dead + live load on one table when concrete is placed.
Concrete per bay (cy)
Cubic yards of concrete per structural bay.
Cycle time (days)
Estimated cycle time: strip, fly, set, pour, and cure.
Est. project duration (days)
Estimated total project duration for all floors (one table set).
Labor savings vs conventional (%)
Estimated labor savings compared to conventional hand-set forms.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Bay width (ft) = 28, Bay length (ft) = 30, Slab thickness (in) = 8, Story height (ft) = 12 = 6 input(s) provided
  2. Calculate Table area
    Table area = tableWidth * tableLength
    714 = 714
  3. Calculate Table width
    Table width = bayWidth - 2.5
    25.5 = 25.5
  4. Calculate Table length
    Table length = bayLength - 2
    28 = 28

Engine last updated .

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