Flatbed Cargo Securement Practice Questions
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- 4
- 5
- 2
- 3
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 front of the vehicle.
- Towards the sky.
- It doesn't matter.
- Towards the rear of the vehicle.
From The CDL Manual
If a boulder is tapered, point the narrowest end towards the front of the vehicle.
- 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.
- All of these are requirements.
- Placed on symmetrical hardwood blocking that extends 3/4 of the length of the boulder.
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.
- Weigh more than 11,000 lbs, or have a volume of more than 2 cubic meters.
- Have more than five distinct sides.
- Weigh more than 5,000 lbs, or have a volume of more than 4 cubic meters.
- Weigh more than 5,000 lbs, or have a volume of more than 1.25 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.
- 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.
- Use only chain to secure large boulders.
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.
- Secure each boulder individually with at least two chain tiedowns forming an X pattern over the boulder.
- Wrap chains around the circumference of the boulder.
- Pass the tiedowns over the center of 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.
- 11,000 lbs
- 25% the weight of the boulder
- 50% the weight of the boulder
- 5,000 lbs
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.
- 1
- 2
- 5
- 3
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.
- 11,300 lbs
- None of these
- 9,200 lbs
- 5,130 lbs
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
- 1,960 lbs
- 11,140 lbs
- 2,920 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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