Flatbed Cargo Securement Practice Questions
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From The CDL Manual
Requirements
If the flattest side of the boulder is rounded or partially rounded, place the boulder in a crib made of hardwood fixed to deck of vehicle.
Boulder should rest on both deck and timber, with at least 3 well-separated points of contact that prevent rolling in any direction.
- Towards the rear of the vehicle.
- Towards the sky.
- Towards the front of the vehicle.
- It doesn't matter.
From The CDL Manual
If a boulder is tapered, point the narrowest end towards the front of the vehicle.
- All of these are requirements.
- Placed on symmetrical hardwood blocking that extends 3/4 of the length of the boulder.
- Supported on at least 2 pieces of 4in x 4in hardwood blocking, extending the full width of the boulder.
- Placed on the vehicle with its largest or flattest side down.
From The CDL Manual
Requirements
Place each boulder on the vehicle with its flattest and/or largest side down.
Support each boulder on at least two pieces of hardwood blocking (at least 10 cm x 10 cm (4 x 4 in) that extend the full width of the boulder.
Place hardwood blocking pieces as symmetrically as possible under the boulder so they support at least 3/4 of the length of the boulder.
- Have more than five distinct sides.
- Weigh more than 11,000 lbs, or have a volume of more than 2 cubic meters.
- Weigh more than 5,000 lbs, or have a volume of more than 1.25 cubic meters.
- Weigh more than 5,000 lbs, or have a volume of more than 4 cubic meters.
From The CDL Manual
The requirements in this section apply to any piece of natural, irregularly shaped rock that:
Weighs more than 5,000 kg (11,000 lb.) or has a volume greater than two cubic meters
Is transported on an open vehicle or in a vehicle whose sides are not designed and rated for the transportation of boulders.
- Tiedowns must be arranged to prevent sliding across the rock surface.
- Use only chain to secure large boulders.
- Tiedowns should be located in valleys or notches across the top of the boulder.
- Boulders must be loaded as far back towards the rear as possible.
From The CDL Manual
Requirements
Use only chain to secure large boulders.
Tiedowns in direct contact with the boulder:
Should be located in valleys or notches across the top of the boulder
Must be arranged to prevent sliding across the rock surface.
- Wrap chains around the circumference of the boulder.
- Pass the tiedowns over the center of the boulder
- Secure each boulder individually with at least two chain tiedowns forming an X pattern over the boulder.
- Attach chains together at the intersection
From The CDL Manual
Secure each boulder individually with at least two chain tiedowns forming an X pattern over the boulder.
Pass the tiedowns over the center of the boulder and attach them to each other at the intersection by a shackle or other connecting device.
- 50% the weight of the boulder
- 5,000 lbs
- 11,000 lbs
- 25% the weight of the boulder
From The CDL Manual
Special Circumstances: Securing a Non-Cubic Shaped Boulder with an Unstable Base
The securement of a non-cubic shaped boulder with an unstable base must meet these requirements in addition to the other large boulder requirements in Section 13.
Surround the top of each boulder at a point between 1/2 and 2/3 of its height with one chain.
The WLL of the chain must be at least 50% of the weight of the boulder.
Attach four chains to the surrounding chain and the vehicle to form a blocking mechanism that prevents any horizontal movement.
Each chain must have a WLL of at least 25% the weight of the boulder, and the angle of the chain must be less than 45° from the horizontal.
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From The CDL Manual
Special Circumstances: Securing a Cubic-Shaped Boulder
The securement of a cubic-shaped boulder must meet these requirements in addition to the other large boulder requirements in Section 13.
Secure each boulder individually with at least two chain tiedowns placed side-to-side across the vehicle.
Place tiedowns as closely as possible to the hardwood blocking used to support the boulder.
- 5,130 lbs
- 9,200 lbs
- 11,300 lbs
- None of these
From The CDL Manual
Size (in diameter):
- 7 mm (1/4 in):
- 8 mm (5/16 in):
- 10 mm (3/8 in):
- 11 mm (7/16 in):
- 13 mm (1/2 in):
- 16 mm (5/8 in):
- Chain Marks -
- Example 1:
- Example 2:
- Example 3:
Grade 70 Transport:
- 1430 kg (3150 lb)
- 2130 kg (4700 lb)
- 2990 kg (6600 lb)
- 3970 kg (8750 lb)
- 5130 kg (11300 lb)
- 7170 kg (15800 lb)
- Chain Marks -
- 7
- 70
- 700
- 2,920 lbs
- 11,140 lbs
- 1,960 lbs
- 6,820 lbs
From The CDL Manual
WIRE ROPE (6 x 37, Fiber Core)
- Diameter:
- 7 mm (1/4 in)
- 8 mm (5/16 in)
- 10 mm (3/8 in)
- 11 mm(7/16in)
- 13 mm (1/2 in)
- 16 mm (5/8 in)
- 20 mm (3/4 in)
- 22 mm (7/8 in)
- 25 mm (1 in)
- WLL:
- 640 kg (1400 lb.)
- 950 kg (2100 lb.)
- 1360 kg (3000 lb.)
- 1860 kg (4100 lb.)
- 2400 kg (5300 lb.)
- 3770 kg (8300 lb.)
- 4940 kg(10900 lb.)
- 7300 kg(16100 lb.)
- 9480 kg(20900 lb.)
NYLON ROPE
- Diameter:
- 10 mm (3/8 in)
- 11 mm (7/16 in)
- 13 mm (1/2 in)
- 16 mm (5/8 in)
- 20 mm (3/4 in)
- 25 mm (1 in)
- WLL:
- 130 kg (278 lb.)
- 190 kg (410 lb.)
- 240 kg (525 lb.)
- 420 kg (935 lb.)
- 640 kg (1420 lb.)
- 1140 kg (2520 lb.)
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