When our drivers haul heavy equipment, they use 4 tie downs. One on each corner of the equipment. On a dozer, they never tie to the blade. I have never seen them cross the chains. They do pull at a 45 degree angle. We transport across state lines all the time. We are checked all the time. I am sure on some of the larger machines they use more tie downs. I saw them haul a backhoe. One chain on each corner and one chain on the bucket of the hoe on each side. Nothing on the loader.
I agree with you, I have never seen the FEL tied down, but I have seen the backhoe with a chain across the bucket knuckle countless times. But I have seen the chains crossed many times. I have yet to see it on the FMCSA site, but many have posted about it on Youtube under peoples videos stating they were pulled over by DOT and given a ticket for not having there load correctly tied down without the kriss cross of the chains. Another member posted theirs were touching and the DOT gave them a warning and made them correct the issue before letting them leave.
Here is another copy from the regulations.
Three ways to transport cargo (Section 2.2.1)
All types of cargo must meet one of three conditions:
Condition 1: Cargo is fully contained by structures of adequate strength.
Cargo cannot shift or tip
Cargo is restrained against horizontal movement by vehicle structure or by other cargo. Horizontal movement includes forward, rearward, and side to side.
Note: If the cargo is contained in a sided vehicle, the vehicle structure MUST be strong enough to withstand the forces described on page 7.
Forward force: 0.8 g (80%)
Rearward force: 0.5.g (50%)
Sideways force: 0.5 g (50%)
Fully contained
Condition 2: Cargo is immobilized by structures adequate strength or a combination of structure, blocking, and bracing to prevent shifting or tipping.
Immobilized
Condition 3: To prevent shifting or tipping, cargo is immobilized or secured on or within a vehicle by tiedowns along with:
Blocking.
Bracing.
Friction mats.
Other cargo.
Void fillers.
Combination of these.