6 reel load.

Think of the letters A and V. Each of these can start to describe a tie down method.
look at your spools, now think about the letter A. If you should run 2 chains down the middle of the spool (The Eye) and form an A at 45 degrees or less, with the 2X4’s working as a cradle, would that secure the spool? Looks like your on a step, so the first and last or single units could have a third chain running straight down from the eye. So they would have up to 3 chains on them. The chains you have linking them together is not doing anything really. More problems than worth. The other thing to consider is the space of the load. If these pictures are of your actual load, you have them spaced too far apart. They should actually be right up on each other. The edges of the spool should overlap one another, and be slightly off set by the width of the flange/side.

 

One thing I would add, and I know you are kind of at the mercy of the shipper on this one, but I like it better when the reels are butted up tight against each other. Sort of helps lock them in place. Maybe you can’t do that with metal reels for some reason?

 

What beast123 posted is how i haul em

Dot reg on spools is much like pallets though, so technically front and rear need 2 (/\) and single in center meets regs, but if no or low dunnage, it rocks more than i like.

 

Also don't terminate your hook to rubrail, use stakepocket, or back around to chain

 

With a spread axle, you can have 40k combined on your trailer axles, but no more than 20k on each axle. You should be fine.

 

why? I've never had an issue, I prefer to hook one of my ratchet binder hooks directly to the rail or pocket, that way I can keep the chain from twisting with one hand and tighten the binder with the other.

 

Depends on trailer setup, ive pulled quite a few that the rail isnt strong enough to use a chain hook on (pockets too for that matter)

That extrusion looks plenty solid to me though...