Question: What is percent grade limit?

Answer: Rise over run. ex. If you go ten feet with a three foot rise, your percent grade would be 30%.

Question:  What is EPDM?

Answer:  EPDM is Ethylene Propylene Diene Monomer, a synthetic rubber. It's a highly flexible stable material, a terpolymer of ethylene and propylene. It has a saturated polymer chemical "backbone," which gives it excellent resistance to ozone and many other advanced chemicals found in today's environment.

Question:  What is SBR?

Answer: SBR stands for styrene butadiene rubber. Its technical chemical type is Styrene-butadiene copolymer and is a very abrasion resistant material and has good physical strength.

Question:  Is performance significantly increased by two chocks instead of one?

Answer:  Yes, two wheel chocks actually provide twice the protection of one.(see Hot Tips)

Question:  Our town in upstate NY has steep grades. What is the best use chock for fire trucks?

Answer: Our HWG "Super Gripper" is a great paired chock for fire departments all over the country.

Question: Question: What is the velocity of a truck on a 30% grade after a distance of .2 meters?

Answer: The velocity after a distance of .2 meters, not accounting for the coefficient of friction, is approximately 3 feet per second.

Question:  What is SAE J348 and what is its use.

Answer: SAE J348 is a standard set by the Society of Automotive Engineers that predicts the potential of any one wheel chock given a worst case scenario.

Question:  I would like to know which chock would be appropriate for the Corvette sitting in my garage to keep it from rolling?

Answer:  Our LWG is a great light aluminum vehicle chock, for use with most passenger, and light truck applications

Question:  I have a utility trailer that I haul a backhoe with. Which chock would be best for this use?

Answer:  Our RPC Pyramid is a good, yet inexpensive rubber chock for use in construction, or any punishing applications where wear and tear are inevitable.

Question:  What would be the best chock for a single axel, one ton dump truck?

Answer: Our RPA has the same crush resistance as our RPC, but it is lighter with ribbed structural support. A good choice!

Question:  I have a Mercedes, and a steep, paved driveway. What is the best chock to use for this situation?

Answer: Our MWG would be the right choice. It is a medium aluminum chock with the gripping power, and the durabilty to hold heavy loads from moving, even at steep grades.

Question:  My company is looking for a good aluminum chock for use at our loading docks. What is the best chock for this job?

Answer:  Our HGS is a great chock for this purpose.

Question:  I own a concrete company with a fleet of cement trucks. I would like to know what the best all around chocks for this application?

Answer:  You need a wide base chock with low PSI to resist soil compression. Our HPG is the chock for you.

Question:  What is the best general use chock for my squad car?

Answer: Our LRG-E is a good all around chock for light vehicles such as passenger cars.

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