Quote:
Originally Posted by rank
In theory yes,but will that require you to climb up on the deck to secure to the inboard tracks? A'int gonna happen very often I bet.
The deck is only 35 inches high and I could use the exercise, so it might happen more than you'd think, but I get your point.
Quote:
Originally Posted by rank
Sounds reasonable. Just keep in mind when they are cut they are done. You can't splice them.
I didn't think I could, but can I use grab hooks to connect two if I had to? What about if I attached a short chain to an anchor point on the trailer, a short chain to an anchor point on the cargo and then joined them with a binder? I doubt it'd come to that, but it would be nice to know what my options are if the proverbial doo doo hits the fan and I run low on chains.
Quote:
Originally Posted by rank
BTW, if you chain by the letter of the law, you'll need twice as many short chains and twice as many binders for those chains as you will if you use chains that are long enough to go full width of the trailer.....say a 14 - 15' chain.
Chaining from trailer to load gets you 50% the WLL of chain.
Chaining from trailer, through, over or around load to opposite side of trailer gets you 100% of the WLL of chain.
I'm not looking at the book, so give me a break if this example below it not exact, but it goes like this:
i.e. chaining a 5500 lb object from its' lifting lug to trailer will require two 3/8" chains and two binders. But chaining that same 5500 lb object from the trailer through it's lifting lug to the opposite side of the trailer can be done with one chain and binder.
Rank, I’m not trying to be argumentative here, as you are one of the CAD members whose opinions I’ve come to respect. Perhaps I misunderstand what you are trying to say, but it would seem that Section 2.2.3 (page 29) of the drivers handbook on load securement found on the FMCSA website: (Look at the bottom the the linked page)
http://www.fmcsa.dot.gov/safety-secu...nual-chap2.htm
seems to disagree with you. It states that Aggregate WLL is calculated by adding together “50% of the WLL of each section of a tiedown that is attached to an anchor point plus 50% of the WLL of each end section that is attached to the cargo.”
They include two examples of tiedowns. One image shows a single piece of chain going from an anchor point on the trailer and then attaching to a corner of the cargo. In the example 50% of the WLL is credited at both ends of the chain totaling 100% of the chain’s WLL. The second image shows one long chain going from an anchor point on the trailer through a piece of pipe and then back to an anchor point on the far side of the trailer. In the second example, 50% WLL is credited for the two anchor points with the trailer totaling 100% of the chain’s WLL.
It appears that according to this handbook, if I took four six foot chains and ran each from a J-hook on the trailer to a corner of the cargo, (assuming I’m using the 3/8” Grade 70 chain I bought - WLL 6,600) I would get credit for an aggregate WLL of 6,600 x 4, or 26,400 lbs. If I use two long chains and chained like the second example you gave, I’d have an aggregate WLL of 13,200.