Trailer Glossary

Trailer Glossary

Does trailer terminology have you confused? No problem! Use the Trailer Technician Trailer Glossary to learn more about some of the most commonly used terminology in the trailer industry.

Click on a trailer term to be taken to the definition.

#

  • 7-Way

A

B

  • B-Train
  • Blink Codes
  • Bobtail
  • Bogie
  • Brake Monitoring System (BMS)
  • Bridge Formula
  • Brinell Hardness
  • Bulkhead

C

  • Class 6 Truck
  • Class 7 Truck
  • Class 8 Truck
  • Clearance Lights
  • Commercial Driver’s License (CDL)
  • Commercial Motor Vehicles (CMVs)
  • Commercial Vehicle Safety Alliance (CSA)
  • Commercial Vehicle Safety Plan (CVSP)
  • Commercial Trailer
  • Compliance, Safety, Accountability Program (CSA)
  • Conestoga
  • Conspicuity Tape (DOT Tape, Reflective Tape)
  • Container
  • Crossmember

D

  • Department of Transportation (DOT)
  • Dock Lock
  • Dolly
  • Door Seal
  • Doubles
  • Driver Vehicle Inspection Report (DVIR)
  • Drop and Hook
  • Drop Deck Trailer
  • Dry Van Trailer

E

  • Electronic Control Unit (ECU)
  • Extendable Double Drop Trailer
  • Extendable Flatbed Trailer

F

  • Federal Motor Carrier Safety Administration (FMCSA)
  • Fiberglass Reinforced Composite (FRC)
  • Fifth Wheel
  • Fixed Tandem
  • Flaps
  • Flatbed Trailer
  • Float Trailer

G

  • Gooseneck Trailer
  • Gross Axle Weight Rating (GAWR)
  • Gross Combination Weight (GCW)
  • Gross Vehicle Weight (GVW)
  • Gross Vehicle Weight Rating (GVWR)
  • Ground Bearing

H

I

J

  • Jackknife
  • Johnson Bar

K

  • Kingpin
  • Kingpin Lock
  • Kingpin Plate

L

  • Landing Gear
  • Lift Axle
  • Lift Gate
  • Load Concentration
  • Load Locks
  • Lowboy Trailer

M

N

  • Non-Ground Bearing
  • Nose Cone

O

  • Out of Service (OOS)
  • Original Equipment Manufacturer (OEM)

P

  • Pig Tail
  • Piggyback
  • Pintle Hook
  • Placard
  • Platooning
  • Pounds Per Square Inch (PSI)

Q

R

  • Refrigerated Trailer (Reefer)
  • Removable Gooseneck Trailer (RNG)
  • Ride Height
  • RoadRailer Trailer
  • Rub Rail

S

  • Safety Measurement System (SMS)
  • Sand Shoe
  • Scuff Liner
  • Semi-trailer
  • Side Rail
  • Side Skirt
  • Sidekit Trailer
  • Slack Adjuster
  • Sliding Fifth Wheel
  • Sliding Tandem
  • Specialty Trailer
  • Spindle
  • Spread Axle
  • Step Deck Trailer
  • Stretch RGN Trailer
  • Stretch Single Drop Deck Trailer
  • Super Single

T

  • Tandem
  • Tare Weight
  • Tautliner
  • Tire Pressure Monitoring System (TPMS)
  • Tone Ring
  • Tractor
  • Trailer Technician
  • Tri-axle

U

  • United States Department of Transportation (USDOT)
  • Upper Coupler

V

W

  • Wheel Base
  • Wheel End
  • Wheel Torque

X

Y

  • Yard Jockey
  • Yard Tractor

Z