Idaho 5 Axle Semi Truck Size and Weight Limits



Idaho: 5 Axle Semi Truck

semi truck tractor trailer

Gross Weight Limits

Ruleset Jurisdiction Permit Required? Estimated Gross *
US Federal National Network No 80,000 lbs
ID Law National Network Yes 85,500 lbs
ID Law Designated Secondary Highways Yes 85,500 lbs

* This is an estimate as it does not include bridge and tire compliance.


Axle Weight Limits

Ruleset: US Federal

Jurisdiction: National Network

Axle Group Tire Type Axle Spread Axle Weight Limit
Steer AxleSingle 20,000 lbs
Tandem DrivesDuals40 - 96 in 34,000 lbs
Trailer TandemDuals40 - 96 in 34,000 lbs
Trailer TandemDuals96 - 108 in 38,000 lbs
Trailer TandemDuals108 - 120 in 39,000 lbs
Trailer TandemDuals120 - 121 in 40,000 lbs

Ruleset: ID Law

Jurisdiction: National Network

Axle Group Tire Type Axle Spread Axle Weight Limit
Steer AxleSingle 20,000 lbs
Tandem DrivesDuals40 - 96 in 37,800 lbs
Trailer TandemDuals40 - 96 in 37,800 lbs
Trailer TandemDuals96 - 108 in 38,000 lbs
Trailer TandemDuals108 - 120 in 39,000 lbs
Trailer TandemDuals120 - 121 in 40,000 lbs

Dimension Restrictions

National NetworkDesignated Secondary Highways
Dimension NameMinMaxMinMax
Overall Height14' 0"
Overall LengthNo Limit75' 0"
Overall Width8' 6"
Front Overhang4' 0"
Rear Overhang10' 0"
Semi-Trailer Length53' 0" 48' 0"
Semi-Trailer WheelbaseNone Specified

References


Disclaimer

These figures are interpreted from the legal codes freely available, please read our full disclaimer and inform us of any errors!