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Calcimator

Perimeter Fire Barrier Calculator

Calculate safing insulation, sealant, and clip quantities for curtain wall perimeter fire barriers.

Inputs

Results

Total safing (sq ft)

500

Mineral wool batts63
Sealant cartridges (29 oz)138
Impaling clips2,000
Estimated labor hours33.3
Total installed cost ($)$8,167.50
How to Use This Calculator
  1. Enter Perimeter length (ft), Gap width (in), and Number of floors.
  2. Set Fire rating (hrs) and Safing thickness (in).
  3. Review the Total safing (sq ft) result.
  4. Use Mineral wool batts and Sealant cartridges (29 oz) to inform your decision.

How the result changes with Perimeter length (ft)

Perimeter length (ft)Total safing (sq ft)
201502.5
7011,752.5
1,3003,250
1,8004,500

What each input means

Perimeter length (ft)
Building perimeter length per floor.
Gap width (in)
Width of gap between floor edge and curtain wall.
Number of floors
Floors requiring perimeter fire barriers.
Fire rating (hrs)
Required hourly fire resistance rating.
Safing thickness (in)
Mineral wool safing insulation thickness.

What each result means

Total safing (sq ft)
Total mineral wool safing insulation area.
Mineral wool batts
Number of standard 2x4 ft batts needed.
Sealant cartridges (29 oz)
Bulk sealant cartridges for top/bottom beads.
Impaling clips
Clips to hold safing at 12-inch spacing.
Estimated labor hours
Installation time at ~15 sqft/hr.
Total installed cost ($)
Materials plus labor.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Perimeter length (ft) = 200, Gap width (in) = 3, Number of floors = 10, Fire rating (hrs) = 2 = 5 input(s) provided
  2. Calculate Total safing
    Total safing
    500 = 500
  3. Calculate Mineral wool batts
    Mineral wool batts
    63 = 63
  4. Calculate Sealant cartridges
    Sealant cartridges
    138 = 138

Engine last updated .

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