"Spud" Door
Popular on our 25" or 31" narrow-bottom trailers, this door consists of a flip-up bottom half and a fold-down upper. This fold down upper enables a piler to extend into the interior of the trailer and is available in your choice of plywood, sheet metal, or expanded metal.

Top Hinge Door
This door is hinged at the top of the trailer. A simple-to-operate pneumatic latch holds the door closed. Hydraulic cylinders hold the door open as the payload is discharged.

Top Hinge Door With Slide-Up Option
This door is hinged at the top of the trailer. A simple-to-operate pneumatic latch holds the door closed. A hydraulic cylinder holds the door open as the payload is discharged.  Our slide-up door features a smaller opening, which enables precise control of payload flow, as well as optimal sealing capability. This option is ideal for higher moisture products.

Offset Top Hinge Door
This door is hinged at the top and is designed to provide additional clearance and convenient unloading. It functions the same as our top hinge door.

Full Swing Slide-Up Door With Hydraulic Operation
Our slide-up door features a smaller opening, which enables precise control of payload flow, as well as optimal sealing capability. It is ideal for unloading into a conveyor or auger and also swings to the full open position for even greater flexibility. This option is ideal for products with high moisture content. (Manual and hydraulic operation available).

Full-Swing Flip-Up Door With Hydraulic Operation (left photo), Manual Operation (right photo).
Our most popular rear door features a two-way opening. The lower section lifts up, allowing the entire door to swing out to the open position. Our flip-up door meets a wide variety of needs. It opens quickly and easily and features a grain-tight seal.
(Manual or hydraulic operation available.)

Fold-Down Door / Side Extensions
Available in 11' sections in a variety of heights. Makes side loading easier.

New Option for stainless steel trailers ; Corrosion Resistant Door (CRD)
Now available for most Trinity Trailer doors (Ask your salesman for details). This door adds stainless steel sheeting and tubing to areas that are most susceptible to rusting and corrosion. Hinges and latches remain carbon steel.