Machine transport weight and tie-downs
Gross vehicle weight, oversize flags and the number of chains needed to haul a machine.
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Comes with the equipment operator plan: every tool for the role, from $10.20 a month at the launch price.
- Your own numbers, worked out as often as you like
- The full load sheet you can print or save to My work
- 5 cited sources, linked, with the checks to make
- Every other tool for the same role, in the same plan
- A plain-words read of your result (a fuller AI read with the Bifrost AI add-on)
Included in these role plans
Example result · fictional numbers
What you get: load sheet
Worked out by this tool from its default inputs. Its role plan lets you run your own numbers, print the sheet and save it.
87,500 lb gross on 6 axles: permit needed: trailer group, gross over the legal limit; 8 direct chains to tie the load
- Cargo weight
- 50,500 lb
- Gross vehicle weight
- 87,500 lb
- Permits
- Permit likely: overweight (over 80,000 lb gross); oversize width (over 8 ft 6 in)
- Chains needed
- 8 direct chains (counted WLL 26,400 lb at half rating, 25,250 lb needed)
Axle weight sheet (estimate; confirm on a scale)
- Steer axle
- 12,000 lb of 20,000 lb (8,000 lb to spare)
- Drive group, 2 axles
- 27,550 lb of 34,000 lb (6,450 lb to spare) (tandem limit)
- Each drive axle (average)
- 13,775 lb of 20,000 lb (6,225 lb to spare)
- Trailer group, 3 axles
- 47,950 lb, over the 43,000 lb limit by 4,950 lb (bridge formula, 3 axles over 9.0 ft)
- Each trailer axle (average)
- 15,983 lb of 20,000 lb (4,017 lb to spare)
- Bridge formula, whole rig
- 87,000 lb for 6 axles over 55.0 ft
and 2 more lines
Also on the sheet
- Tie-down plan · 6 lines, starting with “Cargo to secure”
- Permit sheet · 4 lines, starting with “Load width”
The plain-words read of this example
The rig grosses 87,500 lb on 6 axles, against 80,000 lb allowed by the 80,000 lb cap and the bridge formula. By this estimate trailer group and gross are over the legal limit, so the move needs an overweight permit or a different trailer. Counting each direct chain at half its 6,600 lb rating, as 393.106(d) does, the 50,500 lb load needs 8 chains. Size: overweight (over 80,000 lb gross); oversize width (over 8 ft 6 in).
5 cited sources
- 23 CFR 658.17, Weight (Legal Information Institute (Cornell Law School))
- Bridge Formula Weights (FHWA Office of Operations)
- 49 CFR 393.130, Heavy vehicles, equipment and machinery (Legal Information Institute (Cornell Law School))
- 49 CFR 393.106, General requirements for securing articles of cargo (Legal Information Institute (Cornell Law School))
- 49 CFR 393.108, Working load limits (Legal Information Institute (Cornell Law School))
Plus 5 step-by-step checks, a print layout and a link that reopens it with your numbers.