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Stockmaster PSAGL Ground-Load Semi Livestock Trailer

Load and unload almost anywhere with the Stockmaster ground-load semi livestock trailer. Rugged and long lasting riveted aluminum construction.

  • Move animals almost anywhere they need to go
  • Various decking and compartment options
  • Long lasting riveted aluminum construction
  • Weight saving aluminum sub frame

Side Skins

The side skins of the Stockmaster feature hole punches that are double embossed with side post spacing set on 21" centers for greater strength. Riveting is also spaced closer together to provide for a greater skin to post attachment and creating Stockmaster's strong side construction.

Wilson's larger oval slots provide more airflow than a comparably punched trailer adding to Stockmaster's superior ventilation. Wilson designs the side patterns to minimize leakage, retain less contamination, and make the trailer easier to wash out, thus the Stockmaster is your best choice concerning bio-security.

Wilson's super smooth interior walls also provide for less bruising and less stress of valuable livestock. Ribbed embossment in the solid areas of the PSAGL side pattern adds strength and a resistance to denting.


Don't let yourself be told all floors are the same. They are not! Wilson's flooring is a 6061T6 hardness aluminum – The hardest aluminum available for the best wearing. The floor also incorporates the highest diamond tread height for the surest footing.

The floor corrugations are on 16" centers and conveniently stop about 10" in front of the floor drains to make clean out much easier.

Wilson fastens the floors to the 3" cross bars with non-corrosive stainless steel rivets. Fastening, instead of welding the floors to the cross bars, makes the floor stronger with less wash boarding of the tread plate. There are also no welds to crack, which translates into less maintenance.

The floor of a livestock trailer directly affects the trailer's resale value – An important element to consider when purchasing a new trailer. Wilson offers the best floors in the business and their trailers fetch the best prices at trade-in time.

Floor Crossbars

Wilson's U-shaped floor crossbar has a wider top flange to allow the crossbar to be fastened on both sides and therefore creating more strength and stability for the floor. Because there are no ledges for manure or bedding to lie on, the cross bar is easier to wash and it provides for better bio-security. There are also no sharp edges for animals to injure themselves on.


Wilson is standard with bonding the roof to the roof bows. Bonding eliminates fastener holes in the roof skin and evenly distributes stress vs. single point solid fasteners. Bonding means less fasteners and less weight.

Light-emitting ArmorTuf® roof material is standard. A one-piece .045" aluminum roof skin is available as an option.


Wilson manufactures their heavy-duty gates with full-framed aluminum construction and hinge grease zerks to reduce wear, operate more smoothly, and last longer. The full width hinges reduce sag, lessen movement in the sidewalls, and provide for stiffer connections.

Gate Pins

All Wilson gates have gate pin storage to assist in the quick shutting of the gates. When stowed, pins are not wildly swinging about and you will not be fumbling for the pins when slamming the gates shut.


Wilson's No-Step Ramp offers a clean, smooth, and gentle incline to the upper deck of the trailer. Ramp corrugations coupled with the high diamond tread plate helps livestock to have sure footing.


The smooth wrap-around front and sweeping nose cap, rounded on three planes, has been wind tunnel tested and proven to be more aerodynamic. Less wind resistance means greater fuel economy and superior handling, plus the design allows for more loadable space. The spun corner caps are more resistant to denting and the front skin is thicker, which adds strength to the trailer.

Sub Frame

Wilson's lightweight aluminum sub frame possesses a natural resistance to corrosion problems and also presents a potential 300-pound weight savings over steel sub frames. Aluminum sub frames stay nicer looking far longer than steel sub frames because rock chips and the rusty aftermath do not affect their non-painted natural surface.

Interior Lighting

LED interior lights brightly illuminate interior spaces. They only use .2 amps per light therefore they reduce issues with circuit breakers and tractor alternators.

Panel Kits

Winter panel kits are available to help protect livestock from the elements. A variety of colors are available along with convenient storage options.

Panel Boxes

Wilson aluminum panel boxes are available for convenient storage of winter panel kits when they are not in use. Check our Aftermarket Department for more panel box options.


Several gate options are available for various gate positions and tube style gates allow for greater air circulation.


Spring-loaded locks provide quick and easy closure when loading and also prevent animals from opening during transit.

Roof Hatches

Roof hatches provide extra ventilation and access to livestock. Translucent roofs brighten the trailer interior with natural light.

Side Door

Walkout doors with folding steps allow easy operator access when backed up to a loading dock.

Spray Systems

Spray systems add convenient ways to keep livestock cool.

Full Width Ramp

An optional full width ramp coupled with a full swing door allows for straight-through loading.


Overall lengths range from 36'-0" to 53'-0".


Overall width is 102." Inside width is 99" between sides.


10'-6", 11'-0", 11'-6", 12'-0", 12'-6", 13'-0", and 13'-6" overall outside heights available. 12" front drop. 49" F.W.H.

King Pin

6" high assembly with top locking channel. Standard setting: 30" minimum setting: 27" maximum setting: 44". Pin settings deeper than 44" require belly to be shortened.

NOTE: 10'-0" nose is standard.

Landing Gear

Extruded aluminum telescoping support legs with safety spring lock pins for height adjustment.


12" radius front corners with .080" aluminum single wall construction and extruded aluminum rib reinforcing channels, and a 6" aluminum lower front channel. Three-piece aluminum cap with spun corner caps.

Spare Tire Carrier

Optional at extra cost.


Formed, offset sheet and post side sections of .080" aluminum with two sides of punched and double-embossed oval openings. Extruded aluminum headers, deck rails, and rub rails. Formed posts on 21" centers.

Clean-Out Door

Optional at extra cost.

Access Door

Optional at extra cost.


One-piece translucent roof skin bonded to extruded aluminum roof bows. Aluminum roof is optional.


.110 aluminum tread plate with 5 corrugations, supported by 6" high extruded aluminum crossbars.

Rear End

Left-hand roll-up with 36" opening. Right-hand solid. Full-width rubber bumper.

Rear Compartment

6' standard length.


Optional at extra cost.


Front J560 7-way connector mounted in a nose box. Wiring harness is a ultra-blue sealed system. Tail lights are grommet mounted. Sealed LED. Midspan combination turn & clearance lights are grommet mounted sealed LED. Interior lights - 3 total. Exterior lights - 2 groups of 3 individual stop & turn tail lights with one group on each side of rear end. 2 groups of 2 oval, grommet mounted, sealed LED stop & turn lights with one group on each side of upper rear header. Rear I.D. & Marker lights are recessed grommet mounted LED clearance, marker, and license plate lights are standard.


Air ride, flange mount, bolt-on to aluminum sub frame.


Two: 22,500 lbs. nominal rating standard.


16-1/2" x 7" x 5/8" extended service air brakes, no dust shields. Mandatory FMVSS-121 braking system standard with automatic slack adjusters. ABS is standard equipment using a 2S - 1M system.


Dura-Lite, steel with National oil seals, Axilok spindle nuts, and Sentinal hub caps.


Cast steel, outboard mount.


10-hole Hub-Piloted. Eight, 8.25 x 22.5 white steel disc.


Eight, 255 x 70R 22.5 Bridgestone R250ED.


All steel components are treated to retard rust. King Pin area is completely painted prior to installation. All aluminum components are left natural.

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