Fire Lane Width and Turning Radius Calculator

Design fire lanes with proper width, turning radius, and grade per IFC Appendix D and local fire code requirements.

Input Parameters

Results

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Minimum Lane Width
ft
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Outside Turning Radius
ft
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Total Lane Area
sq ft
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Grade Compliance
Note: Fire lane design must accommodate the largest apparatus expected to respond. Aerial apparatus requires wider lanes (26 ft min) due to outrigger deployment. Grade limits are critical for ladder trucks which have higher centers of gravity. All fire lanes must be marked and maintained clear at all times.

Reference

IFC Appendix D - Fire Apparatus Access: Minimum Width: Engine=20 ft, Aerial=26 ft, Ambulance=16 ft Inside Turning Radius: Typically 25-28 ft Outside Turning Radius = sqrt(IR^2 + WB^2) + overhang WB = wheelbase, overhang = ~2 ft Maximum Grade: Engine=10%, Aerial=6%, Tanker=8% Minimum Vertical Clearance: 13 ft 6 in Minimum Loading Capacity: 75,000 lbs All-weather driving surface required