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Mississippi Axle Weight Limits

Oversize.io Axle Weight Calculator

Maximum Legal Weight Allowed

80,000 pounds overall (GVW) and no more than 12,000 pounds on your steer. Single axle limit is 20,000 pounds, tandem axle limit is 34,000 pounds, tridem axle limit is 42,000 pounds. (The following are the Federally mandated maximum weights for the National System of Interstate and Defense Highways and reasonable access thereto (23 CFR Part 658.17) see DOC 3

Axle Group

Maximum

Single

20,000 pounds

Tandem (Two Axle)

34,000 pounds

Tridem (Three Axle)

42,000 pounds

Gross Vehicle Weight

80,000 pounds

Maximum Permit Weight Allowed

180,000 pounds maximum gross weight (daylight movement permits only);
150,000 pounds maximum gross weight (24-hour movement permits).

Maximum Axle Weights and Minimum Axle Spacings

Five Axles

(80,000 lbs to 95,000 lbs)

Steering

Spacing

Tandem

Spacing

Tandem

14,000 lbs

12’

40,500 lbs

28’

40,500 lbs

Six Axles

(80,000 lbs to 120,000 lbs)

Steering

Spacing

Tandem

Spacing

Tri-axle

14,000 lbs

12’

42,000 lbs

28’

64,000 lbs

Seven Axles

(80,000 lbs to 150,000 lbs)

Steering

Spacing

Tandem

Spacing

Quad

14,000 lbs

12'

56,000 lbs

28'

80,000 lbs

Tri-axle

Tri-axle

14,000 lbs

12’

68,000 lbs

28’

68,000 lbs

Tandem

Tandem

Spacing

Tandem

14,000 lbs

12’

45,333 lbs

20’

45,333 lbs

20’

45,334 lbs

Eight Axles

(80,000 lbs to 170,000 lbs)

Steering

Spacing

Tri-axle

Spacing

Quad

14,000 lbs

12’

72,000 lbs

30’

84,000 lbs

Tandem

Tandem

Tri-axle

14,000 lbs

12’

43,000 lbs

18’

43,000 lbs

30’

70,000 lbs

Nine Axles

(80,000 lbs to 180,000 lbs)

Steering

Spacing

Tandem

Tri-axle

Tri-axle

14,000 lbs

12’

46,000 lbs

18’

60,000 lbs

30’

60,000 lbs

Tandem

Tandem

Quad

14,000 lbs

12’

46,000 lbs

18’

46,000 lbs

30’

74,000 lbs

Tri-axle

Tri-axle

Tandem

14,000 lbs

12’

60,000 lbs

20’

60,000 lbs

30’

46,000 lb

Superloads

190,000 pounds maximum gross weight.

Source of information:
DOC 1 http://mdot.ms.gov/documents/enforcement/Permits/Permit%20Information/Permit%20Rules.pdf
DOC 2 https://www.expresspass.ms.gov/trucking/instruct.htm
DOC 3 https://ops.fhwa.dot.gov/freight/sw/permit_report/index.htm (Federal Rules)

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