Pipe Securement. Make sure that concrete pipe doesn't roll or slide:
Load pipe as compactly as possible
Immobilize symmetrically stacked pipes by securing them in groups
Use blocking systems and tiedowns to increase the effect of friction
Plastic Pipe
Place 4"x4" timbers on the trailer deck every 8 feet for the length of the pipe. Nail blocking wedges to one side of each timber on the same side to keep the pipe from rolling off.
Lay the first pipe across the timbers, and roll them tightly against the wedges nailed to the timbers.
Lay the remaining pipes next to each other to complete the row and nail wedges to the opposite side of the timbers to secure them from being able to roll around.
Secure the first row using two straps or chains depending on shipper's requirements.
Place another set of timbers on top of the first row of pipe, directly above the bottom timbers. Nail wedges at one side of each timber as with the first.
Lay the first pipe of the new tier across the timbers against the wedges.
Lay the remaining pipe next to each other to complete the row and nail wedges to keep the pipes together.
Secure the tier using two straps or chains over top of both tiers.
Secure additional tiers in the same manner, with top row chained or strapped every 8 feet over the entire load.
Caution: Do Not stack pipe higher than the bulkhead of the trailer.
Secure all loose equipment, including chains and binders, lumber, tarps, rubber belting, coil racks, edge protectors, and load bar.
Concrete, Steel Pipe
Every pipe in the bottom tier must be held in contact with the next pipe by tie downs through the front and rear pipes .One tie down through the front pipe pulling to the rear, and one tie down through the rear pipe pulling towards the front. The same must be done for each additional tier of pipe. one tie down must be used through the pipe for every 10 ft. of load length, plus tie downs over the top of the load from front to back.
Securing Pipe with an Inside Diameter Up to 45 in
Pipe securement. Pass tiedown either through the front pipe of the upper tier or outside the front pipe and over both longitudinal tiedowns.
Securing Large Pipe with an Inside Diameter over 45 in
Run at least 2 tiedowns through the front and rear pipe if they aren't also in contact with vehicle end structure, stakes, a locked pipe unloader, or other equivalent means.
Corrugated Steel Pipe
Pipe should have separators equally spaced along the length of the pipe.
Separators should be located at least 8 and not more than 18 inches from ends of pipe.
Wedge blocks must be securely attached to both sides of each end separator. Intermediate separators must have wedges applied to prevent them from migrating out of position.
Load should be packaged wrapped and unit banded.
Sufficient securement should be added across the ends of the large pipes to keep the smaller pipes inside from shifting longitudinally, as seen below.
Source: HERE
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