Chains and Binders: Carbon Steel Truck Tie Downs
Tie down chains and ratchet chain binders are tough tie down equipment , both chains and binders are made of carbon steel, the WLL of the chains and binders are higher than most comparable tie down straps , let’s look at 5/16” transport chain(WLL 4700lbs) vs. WLL 3333lbs 2” ratchet tie down straps , 6600lbs 3/8” transport chains vs. 5400lbs 4” tie down straps , you can see that the chains are much stronger, and the load binders are even stronger than same size chains, 5/16”-3/8” load binder(lever or ratchet type) has WLL of 5400lbs and 3/8”-1/2” binder has WLL 9200lbs. Another reason chains and binders are considered heavy duty, is their design factor is 4:1 while webbing tie downs have 3:1 typical design factor, see “Design Factor” for reference, usually the WLL(working Load limit) is determined by minimum breaking strength divided by design factor, so in order for transport chains to achieve same working load limit as ratchet strap, the chains have to be at least 33% more stronger than straps.
According to NACM recommendations, the carbon steel used in making grade 70 chains should meet following criteria: no more than 0.35% Carbon, 0.040% Phosphorous and 0.050% Sulfur . When the material meets NACM recommendation, the manufacturing process are under strict quality control, and the final products meet or exceed DOT requirements, you can put the chains and binders on your 18 wheeler and haul away .
To tie down big rigs such as forklift, bulldozer is what we use grade 70 transport chains and binders for, tie down straps have no chance against these tough guys, the only choice is binder chains and binders , the most popular chain size for these kind of load are 3/8”, for some light equipment which is still too heavy and hard for straps 5/16” will be ideal chain size. 1/2” and up are mostly for really heavy stuff, for example, military applications, say to tie down battle tanks, you will definitely need 1/2” even 5/8” grade 70 chains to tie those bad boys down.
Grade 70 tie down chains can be used on anything but overhead lifting, you need at least grade 80 alloy chains for overhead lifting. We see people use transport chains to drag the trees, tow the docks, and to tie down the logs out of the the trees, you can go around to find more creative uses of these chains and binders. We’ve heard rumors about that lever chain binders are being outlawed due to it’s security records, but as long as you follow the safety guideline, there won’t be any problems using these binders.
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