BOL
Bill of Lading: the primary shipping document describing the freight and parties.
Free trucking references
Logistics Resources
Tools and calculators for efficient trucking operations
Use these quick references to support planning and communication. Always verify legal dimensions, permits, classifications, and operating requirements with official sources.
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Trailer Dimensions
Common dimensions and specifications by trailer type.
▣Oversize Permits
Official state transportation resources for permit research.
☷Freight Terms
Plain-language definitions for common logistics terms.
▦Freight Class Calculator
Estimate density and likely NMFC class for an LTL shipment.
Quick reference
Common trailer dimensions
Values vary by equipment, manufacturer, state, route, and axle configuration.
| Trailer | Common Length | Common Width | Typical Deck / Interior Height | General Payload Note |
|---|---|---|---|---|
| Dry Van | 48–53 ft | 8.2 ft | 8.5–9 ft | Approx. 45,000 lb cargo |
| Reefer | 48–53 ft | 8.2 ft | 8–8.5 ft | Approx. 43,500 lb cargo |
| Flatbed | 48–53 ft | 8.5 ft | 5 ft deck | Approx. 48,000 lb cargo |
| Step Deck | 48–53 ft | 8.5 ft | 3.5 ft lower deck | Approx. 48,000 lb cargo |
| RGN | 48–53 ft+ | 8.5 ft standard | 18–24 in well | Varies by axle configuration |
Oversize and overweight freight
State permit research
Open the official state DOT directory or select a state as a reminder of where your route review begins.
Official source first
Open U.S. State DOT Directory ↗
Permit rules can change. Confirm dimensions, weight, travel times, escorts, signs, and route restrictions with the state agency or a qualified permit service.
ALAlabamaAKAlaskaAZArizonaARArkansasCACaliforniaCOColoradoCTConnecticutDEDelawareFLFloridaGAGeorgiaHIHawaiiIDIdahoILIllinoisINIndianaIAIowaKSKansasKYKentuckyLALouisianaMEMaineMDMarylandMAMassachusettsMIMichiganMNMinnesotaMSMississippiMOMissouriMTMontanaNENebraskaNVNevadaNHNew HampshireNJNew JerseyNMNew MexicoNYNew YorkNCNorth CarolinaNDNorth DakotaOHOhioOKOklahomaOROregonPAPennsylvaniaRIRhode IslandSCSouth CarolinaSDSouth DakotaTNTennesseeTXTexasUTUtahVTVermontVAVirginiaWAWashingtonWVWest VirginiaWIWisconsinWYWyoming
Freight vocabulary
Terms and definitions
Deadhead
Miles traveled without a revenue-producing load.
Detention
Compensation that may apply when a truck is held beyond agreed free time.
FCFS
First Come, First Served appointment handling.
Lumper
A third-party loading or unloading service at a facility.
NOA
Notice of Assignment used when payment is assigned to a factoring company.
POD
Proof of Delivery signed or otherwise confirmed at delivery.
Rate Confirmation
The written load agreement between broker and carrier.
TONU
Truck Ordered Not Used; potential compensation when a confirmed load cancels after dispatch.