[Angela Clark]

The new rules require that all devices and systems used to secure cargo to or within a vehicle must be capable of meeting the performance criteria. All vehicle structures, systems, parts and components used to secure cargo must be in proper working order when used to perform that function with no damaged or weakened components that could adversely affect their performance. The cargo securement rules incorporate by reference manufacturing standards for certain types of tiedowns including steel strapping, chain, synthetic webbing, wire rope, and cordage. FMCSA has updated the rules to reference the November 15, 1999, version of the National Association of Chain Manufacturers (NACM) Welded Steel Chain Specifications. The agency notes that some of the working load limit values in the 1999 version differ slightly from the previous edition of this publication. Also, the 1999 version includes working load limits for a new grade of alloy chain, grade 100. The agency also changed its reference for synthetic webbing from the 1991 edition to the 1998 edition of the Web Sling and Tiedown Association's publication. Generally, the working load limits are the same as those in the 1991 publication. Changes in the references do not necessarily mean the older securement devices need to be replaced. Motor carriers are not required to replace tiedown devices purchased prior to January 1, 2004. If the tiedowns satisfied the old rules, the devices should also satisfy the new rules.

[UndeadCircus]

These values were chosen based on researchers' analysis of studies concerning commercial motor vehicle performance. The analysis indicated that the highest deceleration likely for an empty or lightly loaded vehicle with an antilock brake system, all brakes properly adjusted, and warmed to provide optimal braking performance, is in the range of 0.8-0.85 g. However, a typical loaded vehicle would not be expected to achieve a deceleration greater than 0.6 g on a dry road. The typical lateral acceleration while driving in a curve or on a ramp at the posted advisory speed is in the range 0.05-0.17 g. Loaded vehicles with a high center of gravity roll over at a lateral acceleration above 0.35 g. Lightly loaded vehicles, or heavily loaded vehicles with a lower center of gravity, may withstand lateral acceleration forces greater than 0.5 g.
Generally, motor carriers are not required to conduct testing of cargo securement systems to determine compliance with the performance requirements. The new rules explicitly state that cargo immobilized or secured in accordance with the general securement rules, or the commodity-specific rules, are considered to meet the performance criteria.

[7everettgibson]

The new rules do not prohibit the use of unmarked tiedown devices. Although many of the participants in the public meetings and numerous commenters to the rulemaking proposal argued the rules should include such a prohibition, FMCSA believes it is inappropriate to prohibit unmarked tiedowns at this time. However, in view of the potential safety hazards of motor carriers misidentifying unmarked tiedowns, there is a provision that unmarked welded steel chain be considered to have a working load limit equal to that of grade 30 proof coil, and other types of unmarked tiedowns be considered to have a working load limit equal to the lowest rating for that type in the table of working load limits.

[mustvisit]

as the braking ratchet is usually on the small crank gear or the intermediate gear if the teeth let go on any of the teeth between the drum and the ratchet once the first few teeth go the thing can get enough momentum up to just keep filing the teeth away untill either the load finds a natural stop or the cable goes full length and then rips out of the drum.

[jill12]

Just to add insult to injury the ratchet itself contributes to the wear of the gear its running on.

[kdawson]

I need more than one hand to count the number of injuries that I've been made aware of (from the mouth of the "victim" and I've witnessed it twice personally) when the operator has had the pawl disengaged (or its engagement damaged enough that it was ineffectual) and either run out of arm strenght, taken a break or was trying to "winch down" then had the winch handle run away on them.

[loadingpicker87]

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[cbrendanjarvisi]

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