NFPA 1901 Recommendations Defined
Two or more wheel chocks, mounted in readily accessible locations, that together will hold the apparatus, when loaded to its GVWR or GCWR, on a hard surface with a 20 percent grade with the transmission in neutral and the parking brake released.”
Chocks that meet or exceed 1901 Recommendations
 | HGS 12103 | HGS Large Aluminum Chock Molded Heavy Gripper Standard |
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 | HLG 12102 | HLG Heavy EZ1901 Gripper Fire Truck Wheel Chock |
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 | HRX 21110 | HRX Large Rubber Contour Extruded w/ Eye Bolt |
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 | HWG 12101 | HWG Large Aluminum Chock |
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 | HWGY 1210111000 | HWG-Y Large Yellow Aluminum Chock |
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 | MWG 12202 | MWG Medium Aluminum Chock |
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 | RPT 22103011 | RPT Large Rubber Pyramid General Use |
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 | RPX 22105 | RPX Extruded Rubber Pyramid |
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