US Federal Regulations 5 Axle Semi Truck Size and Weight Limits

US Federal Regulations: 5 Axle Semi Truck

semi truck tractor trailer

Gross Weight Limits

Ruleset Jurisdication Permit Required? Estimated Gross *
US Federal Interstates No 80,000 lbs

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

Axle Weight Limits

Ruleset: US Federal

Jurisdication: Interstates

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

Dimension Restrictions

Dimension NameMinMax
Overall HeightState Specific
Overall LengthNo Limit
Overall WidthState Specific
Semi-Trailer LengthState Specific
Semi-Trailer WheelbaseNone if trailer is 48' or less; State Specific for trailers over 48'



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