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Why Choose an SX3
SmithCo’s SX3 Three Axle side dump is a popular choice in states allowing extended gross weights for truck/trailer combinations with more than five axles. The SX3-4234 and SX3-4636 are the most common three axle trailer sizes but lengths run from SX3-3734 to SX3-5036.
Shorter to mid-length trailers tend to be used for everyday construction jobs, while the longer three axle trailers are frequently used for line-haul applications.
SX3 Features
- 37 to 50 foot frame lengths
- Stockpile or windrow
- Watertight; no leaks
- Low load height
- Dumps toward either side
- AR450 Steel Tub, One Piece Floor
- 80/100 KSI Steel Frames
- Self-Aligning, Spherical Bearing Hinges
- External Column Tub Supports
- No Center Tub Divider
- Shot Blast Paint Prep
- Polyurethane Paint
Specifications
SX Series Tub Capacities
| Waterfull | Heaped | |
|---|---|---|
| 34’ tub | 23 cu yd | 31 cu yd |
| 36’ tub | 24 cu yd | 32 cu yd |
Model SX3-4234 SmithCo Side Dump Trailer
Specs shown are for 41’ 5” frame length; other configurations available.
| Frame Length | 41’ 5” |
| Tub Length | 34’ |
| Width | 102’ |
| Height | 8’ 3” at Tub side, 9’ 6” at Center |
| Tub Construction | 1/4" Thick, AR450 Steel (or equivalent) 3/16" Thick, AR450 Steel (or equivalent) is Optional External Column Supports, No Center Tub Divider |
| Frame Construction | 80/100 KSI, Fabricated Steel I-Beam |
| Kingpin | 2” Kingpin, 18” Setting, Replaceable Type |
| Landing Gear | Two Speed, Non-Load Bearing |
| Bumper | Push Bar Type, Bolt-On |
| Cylinders | 3500 PSI, 5” bore |
| Hinges | Self-Aligning, Spherical Bearing Type (greaseable) |
| Suspension | Air Ride Suspension Standard Spring Ride Available |
| Axles | (3) 25,000# capacity |
| Hubs | 10 Hole, Hub Piloted |
| ABS | 2S1M Anti-Lock Brake System |
| Drums | Outboard Mount, Cast Steel |
| Wheels | Steel Disc, 8.25 x 22.5 (12) |
| Tires | 11 R 22.5 G Radial Tires (12) |
| Brakes | 16 1/2” x 7” |
| Fenders | Front & Rear, 1/4” Synthetic, 7 Degree Slope |
| Lights | 12 Volt LED ICC w/Sealed Harness |
| Mud Flap | (2) Polyline Anti-Spray Splash Guard w/ SmithCo name |
| Paint | Polyurethane, any combination of gray, white or black Special colors available upon request |
| Minimum Tractor Hydraulic Requirements | 25-30 GPM 2,600 - 2,800 PSI 10 Gallon Reservoir |
Layout Options
Photos
"Nothing stands up to a SmithCo side dump."
Steve Schmillen, Schmillen ConstructionWe tipped a few end dumps over, came across side dumps, ended up switching to SmithCo, and the rest is history; that's all we own.
We've never tipped over a SmithCo. The tarps operate well. We like the frames; the frames don't twist. If you're asking for a suggestion on what I'd do different, I don't know what it would be. We really put them to the test. We just got done with a 3-year project at the airport, and we put over 200,000 tons of broken concrete into [SmithCo] side dumps, crushed it, and hauled it back out on the runway. Months of big excavators throwing concrete in them, and they never skipped a beat.