Load securement pet Fmcsa requirement

Ive never heard anybody refer to securement that way... Get familiar with WLL of your equipment.. on a 10k you may only need 2 straps for weight. But you have to cover for length as well. Which is 1 strap for every 10 ft of length.. and then an extra strap up front if you dont have a bulkhead...

If you have a 10k or more machine with tracks or wheels you will need to secure 4 independent anchor points on the machine... Which all that means is each securement has to be independent from each other.. post some pics of what ur hauling and we can give ya a good idea of what u need

 

I dont understand anything about securing for .8gs of force or something like that. Im not sure how a guy would even measure that ?
You need to secure for half the weight of the product at minimum while making sure u have enough for length of product as well... So a 10k load would need 5k worth of securement to satisfy the weight requirement.

 

I’ve got one of those books, never opened it. I just go by weight and looks.

 

That’s 80%of the weight. The 5 is 50% of the WLL.
So if you have heavy machinery weighing 40k, you cover your 4 point securement, 50% front or enough WLL for 20000lbs, and 80% of 40k or 32000lbs

 

Cant say ive ever seen anybody do it like that.. on a 40k machine and 3/8 chains most are gonna throw 4 chains on each corner and roll . Maybe a 5th chain somewhere in the middle depending what it is ur hauling.

 

The laws are worded really dumb because of being written by lawyers.

Section 1 of 393.102 covers the securement requirements based on the breaking strength of the tiedowns which on most straps/chains rated as tiedowns is going to be 3x the labeled WLL. This is why 2" straps have a WLL of 3333 LBS on them. The breaking strength of a 2" nylon strap is typically 10,000lbs.

Section 2 of 393.102 covers the requiremenst based on the Working Load Limit. These are the numbers you should be using since most of your tiedowns will have a clearly labeled WLL not a breaking strength.

You can essentially ignore Section 1 for the purposes of securement because your tiedowns are going to be rated by WLL.

Lets say you have a load that is a single crate that weighs 40,000lbs. You would have to secure it with enough tiedowns to reach have of the machines weight when you add up the WLL of all the tiedowns used. So in total you need 20,000lbs of WLL.

Now we apply the numbers from Section 2 of 393.102 that you had above. For those numbers they are effectively percentages of gravity. 0.435g is 43.5% of the force of gravity pulling down. You need that amount of your WLL pulling forward on the load. 43.5% of 20,000lbs is 8700lbs pulling forward on the load. You then need 0.500g or 50% of of the WLL pulling backwards which would be 10,000lbs. Finally you have to have 0.250g or 25% of the WLL pulling to each side which would be 5,000lbs.

A 4" nylon strap is typically rated for 5,400 lbs each. We need to get to 20,000lbs of WLL total for securement. So in total we need to put at least 4 straps on that single crate that weights 40,000lbs to cover the WLL. Straps straight over the top are effectively pulling in all directions so you also have enough securement for the weight.

Section 393.106(d) is where they cover only needing half the weight of the load in WLL for securement.

Federal Register :: Request Access

4 on each corner would not be enough. Direct tiedowns on each of the 4 corners would only be enough WLL for a 26,400lb machine if you are using G70 3/8 chains. The rating is cut in half by 393.106(d) that I linked above. Even if you add the 5th chain somewhere as a single indirect securement you still come up 400lbs short of the aggregate WLL requirement and probably short of either the forward or rearward pull requirements unless you manage to get it directly in the middle pulling straight down.

 

I think Razor covered it, but the 80%g force pull is ALWAYS direct securement.

Direct securement pulls in a direction. Indirect is usually a downward pull towards the deck that relies on friction.