QRTRHRS
Elite Member
From the FMCSA website if you can understand it. "Minimum Working Load Limit for Cargo Securement Devices and Systems
The aggregate working load limit of any securement system used to secure an article or group of articles against movement must be at least one-half the weight of the article or group of articles. The aggregate working load limit is the sum of: One-half the working load limit of each tiedown that goes from an anchor point on the vehicle to an attachment point on an article of cargo; and The working load limit for each tiedown that goes from an anchor point on the vehicle, through, over or around the cargo and then attaches to another anchor point on the vehicle."
I have said this over and over again, go to the site and read the "Educational Materials Cover Cargo Securment". The material will help you understand Subparts 393.100 through 393.136.
Anyone who has ever hauled rolls of paper in a box trailer should get a kick out of the ongoing chains vs straps comments. True, each have pluses and minuses and should be used accordingly with some cross over of applicability. There are some specifics in the regs such as for containers (latching devices or chains) and chains only for boulders and no straps for crushed cars. For most applications, the keyword is tiedowns.
For most occasional users on this forum, chains would probably be better if for no other reason than they would never wear out and would satisfy the average DOT cops scrutinizing.
Chains weigh alot more than straps do. All those little lbs add up. Straps are less likely to damage cargo, alot of which is like tying down eggshells yet must stay on a trailer. The load that you see strapped down rather than chained may be due to the backhaul that was available and not the normal load. If the main cargo is heavy equipment, straps would hardly be economically feasible.
The aggregate working load limit of any securement system used to secure an article or group of articles against movement must be at least one-half the weight of the article or group of articles. The aggregate working load limit is the sum of: One-half the working load limit of each tiedown that goes from an anchor point on the vehicle to an attachment point on an article of cargo; and The working load limit for each tiedown that goes from an anchor point on the vehicle, through, over or around the cargo and then attaches to another anchor point on the vehicle."
I have said this over and over again, go to the site and read the "Educational Materials Cover Cargo Securment". The material will help you understand Subparts 393.100 through 393.136.
Anyone who has ever hauled rolls of paper in a box trailer should get a kick out of the ongoing chains vs straps comments. True, each have pluses and minuses and should be used accordingly with some cross over of applicability. There are some specifics in the regs such as for containers (latching devices or chains) and chains only for boulders and no straps for crushed cars. For most applications, the keyword is tiedowns.
For most occasional users on this forum, chains would probably be better if for no other reason than they would never wear out and would satisfy the average DOT cops scrutinizing.
Chains weigh alot more than straps do. All those little lbs add up. Straps are less likely to damage cargo, alot of which is like tying down eggshells yet must stay on a trailer. The load that you see strapped down rather than chained may be due to the backhaul that was available and not the normal load. If the main cargo is heavy equipment, straps would hardly be economically feasible.