Checkers Monster 1911 Wheel Chocks User Guidelines - Manual

1910.178 (k) Trucks and railroad cars. (1) the
brakes of highway trucks shall be set and wheel
chocks placed under the rear wheels to prevent
the trucks from rolling while they are boarded
with powered industrial trucks.
OSHA SPECIFIES
WHEEL CHOCK USER GUIDELINES
www.checkersindustrial.com #ZIS-W1911
Ver: 2/11
Wheel chocks are effective holding devices, but only when used
properly. Namely, chocks must be used in pairs and positioned
downhill and below the vehicles center of gravity. This could mean
chocking in front of the front wheels if the vehicle is disabled while
traveling down a grade or the back of the rear wheels if the vehicle is
disabled while traveling up a grade. This could also mean chocking the
front and back of one wheel if the direction of the grade cannot be
determined or even using multiple pairs of chocks in severe conditions.
Although these are generally accepted chocking procedures, it is the decision
of each individual end user to make the final determination about chocking.
Various combinations of chocking procedures should be evaluated and tested
under various situations and conditions.
Wheel chocks should be used not only when a vehicle becomes disabled on a
grade, but also during maintenance and any time the truck is left unattended.
Chocks must also be positioned snugly and squarely against the center of the
tire tread. Improper positioning decreases the wheel chock’s effectiveness.
Chocks should be used only after the parking brake is applied and tested.
WARNING!
Individual end user testing required to ensure proper chock selection
and application
• Model 1911 wheel chocks are rated for haul trucks with tire
sizes over 105 in. (2667 mm) diameter and load capacities up to
400 tons (a minimum of four (4) model 1911 Monster Wheel
Chocks must be used when chocking haul trucks with load
capacities from 240 tons up to 400 tons).
• Improper use may result in product failure
• Select wheel chock according to vehicle type and size
• Always use in pairs and on firm surfaces
• Multiple pairs may be required in extreme conditions
• Chock in direction of grade
• Chock both sides of wheel if direction of grade is undetermined
• Use only after parking brake is applied and tested
• Center chocks snugly and squarely against tread of each wheel
• Always test chocks to ensure they meet requirements
• Do not drive over wheel chocks
(GUIDELINES CONTINUED ON REVERSE SIDE)
1911 WHEEL CHOCKS
FOR HEAVY DUTY
APPLICATIONS
TM
HEAVY DUT Y WHEEL CHOCKS
DOWNHILL GRADE
Chock front wheels on each side of truck
LEVEL GRADE
Chock both sides of wheel
UPHILL GRADE
Chock outside rear wheels on each side of truck