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AirPave Unfilled vs. Fire Truck Fully Loaded

MichaelBean blog, grass paving, Porous Flexible Paving

AirPave Grass Pave System can handle the weight of a Fire Truck? The short answer is Yes!

AirPave Grass Pave System is composed of a typical road base with a varying depth dependent upon the locations specific needs, the geocell grid filled with a clean sharp sand, the Sustane Fertilizer and either Hydro seed the grass surface or a thin cut sand based sod. Installed as described the geo cell has a compression strength of 6,747 psi.

AirPave always ships with enough for 2 layers of the guaranteed analysis fertilizer needed. One for the sub base to be worked in before compaction and watered. And the other to be added on top of the sand filled grid and watered in before the turf grass is installed. We believe if done properly it will set up the project for the best possible result. 

However we wanted to show you how the geo cell holds up to a fully loaded Quint Fire Truck with a 100′ ladder and a filled 500 gallon water tank.

Here are a few pictures taken by an AirField employee at a local Fire Station.

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AirPave Grass Pave Empty on Concrete with a fully loaded Quint Fire Truck

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AirPave Grass Pave Empty on Concrete with a fully loaded Quint Fire Truck

CSI Codes 32 12 43 and 32 14 43

This would be the responding engine from Corralito’s fire station. Distance between axles:  14’ – 0”

Truck #1 Corralito’s 4111 GVWR = 40,540lb

Front Axle = 16,540lbs / 2 wheels = 8,270lbs per tire = 41.35 psi (AirPave 163 times stronger)

Rear Axle = 24,000lbs / 4 wheels = 6,000lbs per tire = 30 psi    (AirPave 224 times stronger)

This would be the second engine from Pajaro Valley Fire. Distance between axles:  14’ – 4”

Truck #2 Pajaro Valley 4510 GVWR = 38,540lbs

Front Axle = 16,540lbs / 2 wheels = 8,270lbs per tire = 41.35 psi (AirPave 163 times stronger)

Rear Axle = 22,000lbs / 4 wheels = 5,500lbs per tire = 27.5 psi (AirPave 245 times stronger)

This would be the “any type” engine from Corralito’s Distance between axles:  15’ – 6”

Truck #3 Corralito’s 1174 GVWR = 35,000lbs

Front Axle = 12,000lbs / 2 wheels = 6,000lbs per tire = 30 psi (AirPave 224 times stronger)

Rear Axle = 23,000lbs / 4 wheels = 5,750lbs per tire = 28.75 psi (AirPave 234 times stronger)

This would be the Water Tender that would respond Distance to the first axle:  16’ – 1”

Distance to the second axle:  20’ – 9”

Truck #4 Water Tender 4551 GVWR = 64,000lbs

Front Axle = 18,000lbs / 2 wheels = 9,000lbs per tire = 45 psi (AirPave 149 times stronger)

Rear Axles = 46,000lbs / 8 wheels = 5,750lbs per tire = 28.75 psi (AirPave 234 times stronger)

Let’s say fire truck has a GVWR = 75,000 lb. That weight is distributed amongst the axles and the wheels giving the effective surface pressure.

Using the typical H-20 & H-25 AASHTO formula for Surface Pressure: Axel / number of wheels / 200 square inches of contact per tire (20”x10”)

(see below)

Front Axle GVWR = *22,500 lbs / 2 wheels = 11,250 lbs per tire = 56.25psi (AirPave is 120 times stronger)

Rear Axle GVWR = *52,500 lbs / 4 wheels = 13,125 lbs per tire = 65.625psi (AirPave is 103 times stronger)

(*estimated GVWR per axle for example)

We do not have the specs for the 75,000-lb. truck which likely would have 2 rear axles and would drop the psi to 33psi.

AirPave Grass Paving Systems has an ASTM Tested

6,747 PSI / 971,568 PSF (Strong enough for

Fire Engines weighing more than 75,000 lbs.)

Please contact AirField Systems with any questions… 405-359-3775.