Flatbed Cargo Securement Practice Questions
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- Blocking.
- The vehicle wall.
- Other cargo.
- Friction mats.
From The CDL Manual
Direction of Potential Movement: Rearward
Methods to Prevent Movement:
- Other cargo
- Blocking
- Fiction mats
- Tiedowns
- Concrete pipe loaded cross-wise on a flatbed trailer.
- Concrete pipe loaded in a sided vehicle or container.
- Concrete pipe eyes vertical and concrete pipe loaded lengthwise.
- Concrete pipe that is grouped together into a single rigid article and may not roll.
From The CDL Manual
What is exempt from these specific requirements?
Follow general cargo securement requirements (Section 2) when transporting the following pipe:
- Concrete pipe that is grouped together into a single rigid article and may not roll.
- Concrete pipe loaded in a sided vehicle or container.
- Concrete pipe eyes vertical and concrete pipe loaded lengthwise.
What is covered under these specific requirements?
Any concrete pipe loaded crosswise on a platform trailer or vehicle that is not exempt.
- 2 x 4 in
- 8 x 10 in
- 4 x 6 in
- Half the diameter of the pipe
From The CDL Manual
Blocking must be:
- Placed against the pipe
- Secured to prevent it from moving out from under the pipe.
Timber blocking must have a minimum nominal dimension of 10 x 15 cm (4 x 6 in).
- 80% of the total weight of all pipes in the group.
- 5,000 lbs.
- More than 50% of the total weight of all pipes in the group.
- It depends on the size of the pipe.
From The CDL Manual
General tiedown requirements
The aggregate working load limit of all tiedowns on any group of pipe must be more than half the total weight of all pipes in the group.
- All of these apply.
- Stack the tiers in pyramid fashion.
- Bells of the upper tiers must all be on the opposite side of the vehicle from the bells of the tier below.
- Bells of the bottom tier must all be on the same side of the vehicle
From The CDL Manual
More than one tier with complete tiers
Bells of the bottom tier must all be on the same side of the vehicle
Bells of the upper tiers must be are on the opposite side of the vehicle from the bells of the tier below.
- As a partial tier in one group.
- As a partial tier in two groups.
- As a complete tier.
- Any of these are acceptable.
From The CDL Manual
Requirements for arranging the top tier
Arrange the top tier as a complete tier, a partial tier in one group, or a partial tier in two groups.
- If the ends cannot be staggered, they must be aligned.
- Load bell pipe on one tier so that the bells alternate on opposite sides of the vehicle.
- If possible, the ends of consecutive pipe must be staggered within the allowable width.
- Load bell pipe on one tier so that the bells all lie on one side of the vehicle.
From The CDL Manual
One tier
Load bell pipe on one tier so that the bells alternate on opposite sides of the vehicle.
If possible, the ends of consecutive pipe must be staggered within the allowable width.
If the ends cannot be staggered, they must be aligned.
- Chains
- Nylon rope.
- Straps.
- Wire.
From The CDL Manual
Tiedown requirements
- Pipe may be secured individually or as a group.
- Tiedowns through the pipe must be chains.
- Front-to-back tiedowns may be chain or wire rope.
- 6
- 10
- 3
- 15
From The CDL Manual
As a group
Place lengthwise tiedowns over the group of pipes:
Either one 13 mm (1/2 in) chain or wire rope,
Or two 10 mm (3/8 in) diameter chain or wire rope
Place one crosswise tiedown for every 3.0 m (10 ft) of load length.
Either attach the side-to-side tiedown through a pipe
Or pass the tiedown over both front-to-back tiedowns between two pipes on the top tier.
- Two 1/4 inch chains or wire ropes.
- Two 3/8 inch chains or wire ropes.
- Two nylon straps with aggregate WLL of 50% the weight of the load.
- One 3/8 inch chain or wire rope.
From The CDL Manual
As a group
Place lengthwise tiedowns over the group of pipes:
Either one 13 mm (1/2 in) chain or wire rope,
Or two 10 mm (3/8 in) diameter chain or wire rope
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