COILS: Chains+straps or just chains?

Read the reg very closely. It is very easy to confuse this, as the .80 refers to the breaking strength of the tie down, not the working load limit of the tie down.
If you use a grade 70 3/8 chain, it's WWL is 6,600 pounds and it's MBS (Minimum Breaking Strength) is 26,400 pounds, per http://www.mfrexpress.com/working-load-limit-ezp-23.html?chapter=1
That link discusses how WLL limits and MBS are determined. According to it, the WLL limit of a grade 70 chain is 1/4 of the MBS. As a 5/16 grade 70 is 4,700 pounds WLL, the MBS would be 18,800 pounds. As a 26,000 pound coil, requires a minimum of 13,000 pounds WLL, 3 5/16th chains satisfy that requirement and also more than cover the .80 MBS (20,800 pounds) deceleration requirement.
Placement of the chains is also critical. One chain (5/16) straight down, one chain (5/16) to the rear and one chain (5/16) to the front, would satisfy the minimums, as the one straight down and one to the rear count for the .80 requirement. But as mentioned before, that is only the minimums.
In short, if you have enough securement devices to satisfy the WLL, you have enough to satisfy the .80 deceleration. However, placement of the securement devices then comes into play to satisfy the .80 deceleration.

 

These aree really good diagram's but there is slight little issue I see that I have heard you can get ticketed for and that is wrapping a chain around 2 spool's instead of one, and also the rear two eye to the sky coil's only have 2 chains instead of 3 like the first but also you can't use chains because they cross criss cross and make contact with each other. I do know chain's can't be touching one another and they will cut ticket's for it.

 

You can hear all kinds of stuff, but what you hear often is not valid. The written and published regs are what counts. I have not seen any regs stating what you have heard. Perhaps your source could offer a link to the regs, backing that claim.

 

RKC transport website. I did a search a few months about about securing a coil and it gave me this site and it has a lot of good securement diagrams, including slinky's. Just go to "driver support" and then "load securement"

http://www.rkcampf.com/coil-shotgun.htm

 

You are correct. They are 4,700 WLL but I always under rate them to 4,000 to be on the safe side. As for strap's, if the white tag is fully there and readable, its good for it's WLL, if only half of the tag is there or half readable, I use it for half its WLL, no tag straps get thrown in the box then cut up and make V-board's out of them. A strap that has a cut longer than 20% of the width I won't use. I keep lot's of extra's.

 

A 4" strap with a unreadable WLL tag, or missing one is good for 4,000#
A 2" is good for 2,000#

Straight out of the little green book

 

Very true. Thats what I was taught during securment class and got my arse chewed out all 9 kinds of ways because of touching chain's. I'll have to read back through and see if this is fact or not. Now the question is how many driver's actually follow the mandatory "load check tire check" every 3 hour's or 150 mile's (which ever comes first)?

 

well ive been d.o.t.ed with the x chains touching each other.there's not alot you can do bout it sometimes.there is no issue with chains overlapping chains.as was mentioned multiple times,as long as the wll is 50% or better than the weight of the load you are legal.that 80% of forward motion is what makes me put on one more to the rear,just to cover my arse

 

Yea but I don't take chance's even if it does cost a little more for extra equipment.

 

yeah well.....sometimes its less,sometimes its more.after the 1st stop n ck,if nothing moved or loosened,then i'll be running longer till the next ck.