NC state page · Last reviewed 2026-05-25
North Carolina Truck Weight Limits and Permit Sources North Carolina truck weight limits, NCDOT permit links, and official penalty references with field-level confidence labels.
This page is a reference aid, not legal advice. Weight rules, permits, routes,
and penalties can change without notice; use the linked official source as the
final authority.
At-a-glance summary Field Value Source Status Confidence Gross 80,000 lb gross weight reference under North Carolina General Statutes section 20-118. confirmed high Single axle 20,000 lb single axle reference under section 20-118. confirmed high Tandem axle North Carolina section 20-118 includes tandem and axle-group limits; verify exact spacing and route before relying on a single number. inferred from official source medium Bridge formula Federal bridge formula applies on Interstate routes; section 20-118 should be checked for North Carolina rules. inferred from official source medium Permit agency North Carolina Department of Transportation. confirmed high Seasonal / frost No official statewide frost-season weight restriction found during this review. no statewide rule confirmed low Fine source North Carolina section 20-118 includes civil penalty language for weight violations; citation-specific calculation should be verified in current statute. inferred from official source medium
Field-level reference data Regular weight limits Gross vehicle weight limit 80,000 lb gross weight reference under North Carolina General Statutes section 20-118. confirmed high Single axle limit 20,000 lb single axle reference under section 20-118. confirmed high Tandem axle limit North Carolina section 20-118 includes tandem and axle-group limits; verify exact spacing and route before relying on a single number. inferred from official source medium Bridge formula applies Federal bridge formula applies on Interstate routes; section 20-118 should be checked for North Carolina rules. inferred from official source medium Interstate notes Use federal Interstate rules together with section 20-118 and any NCDOT permit. confirmed high Non-Interstate notes Section 20-118 is the reviewed official state-law source for North Carolina weight limits. confirmed high
Axle and loading notes Steer axle notes Steer axle legality depends on axle, tire/equipment, registration, and route limitations. inferred from official source medium Drive axle notes Drive axle groups should be compared with section 20-118 and any NCDOT permit conditions. inferred from official source medium Trailer tandem notes Trailer tandem adjustments should be re-weighed and checked against North Carolina statutory limits. inferred from official source medium Fifth wheel notes Fifth-wheel movement is an adjustment step, not an NCDOT permit. inferred from official source medium Bridge law notes Use FHWA Bridge Formula for Interstate review and section 20-118 for North Carolina legal language. inferred from official source medium
Oversize / overweight permits Permit agency North Carolina Department of Transportation. confirmed high Permit office name NCDOT Oversize/Overweight Permit Unit. confirmed high Official permit URL NCDOT Oversize/Overweight Trucking Permits page. confirmed high Online permit portal Use the NCDOT permit page to reach the current online permit system. inferred from official source medium Permit contact Use contact information published on the NCDOT OS/OW trucking permits page. confirmed high Permit notes The NCDOT OS/OW permit handbook is the reviewed source for permit process context. confirmed high
Seasonal and special restrictions Frost / seasonal restriction No official statewide frost-season weight restriction found during this review. no statewide rule confirmed low Seasonal weight notes Route, bridge, emergency, or permit restrictions may still apply. inferred from official source low Official seasonal URL not found in official review low
Fines and enforcement Overweight fine structure North Carolina section 20-118 includes civil penalty language for weight violations; citation-specific calculation should be verified in current statute. inferred from official source medium Overweight ticket notes Use the actual citation and current section 20-118 penalty language before estimating a fine. inferred from official source medium Enforcement agency Official enforcement agency page not separately confirmed in this review; NCDOT and state law sources were reviewed. not found in official review low Fine official URL North Carolina General Statutes section 20-118. inferred from official source medium CSA / safety notes CSA impact depends on inspection/reporting; use FMCSA SMS materials. inferred from official source medium
Scale notes Public scale notes A public scale ticket helps check distribution but is not an NCDOT permit. inferred from official source medium Weigh station / enforcement notes Compare scale readings to section 20-118 and NCDOT permit terms. inferred from official source medium CAT Scale disclaimer CAT Scale is not North Carolina permit authority. inferred from official source medium Scale ticket notes Keep scale records and compare each axle group to section 20-118 and any permit. inferred from official source medium
North Carolina has a strong state-law source for legal weights and a clear NCDOT
permit unit. The fields that depend on exact axle spacing or ticket-specific
penalty calculation are kept medium confidence rather than oversimplified.
How to verify this yourself
Open section 20-118 for the legal weight and penalty language. Then use NCDOT’s
OS/OW permit page and handbook for permit process and conditions.
FAQ Where is North Carolina's legal weight law? The reviewed official source is North Carolina General Statutes section 20-118.
Who handles North Carolina OS/OW permits? NCDOT's Oversize/Overweight Permit Unit is the reviewed permit source.
Why is the tandem field medium confidence? The statute is official, but exact tandem/group application depends on spacing and route, so users should verify the specific configuration.