Doonan has been in business for over 30 years building custom trailers that meet or exceed the specialized needs of owner operators. All Doonan trailers are hand-crafted and built to order.
Doonan extendable drop deck trailers come in a variety of configurations: any length up to 53' in the closed position, and up to 72' in the open position
While the overall G.V.W.R. is listed at 90,000 lbs, a concentrated load capacity of 80,000 lbs in 4' can be provided in the closed position.
Standard Features
| Main Beam: Female | Female beam with 130k flange material 1/2" x 6" and 7 Gauge web material |
| Main Beam: Male | Male beam with 130k flange material 5/8" x 6" and 7 Gauge web material |
| Side Rail | 6" structural steel side rail |
| Cross Members | 4" steel cross members, set on 12" centers |
| 5th Wheel | SAE King Pin with 18" location, 1/4" skid plate |
| Paint | 100% sandblasted, epoxy primer and black topcoat |
| Floor | 1 1/8" Apitong floor, double screwed with 5/16" screws |
| Electrical | Grote - sealed beam lighting system with 3 clearance lights per side, 3 marker lights in rear panel and 4 tail lights per side |
| Landing Gear | Jost A400T17 landing gear |
| Suspension | Hendrickson HT250 suspension |
| Axle | 25,000 lb. axle with cast hub/drums |
| Wheels | 8.25" x 22.5" hub piloted 8-hole steel disc wheels |
| Tires | Michelin 255/70R22.5PXZE tire |
Standard Options
Dimensional Drawings
| Triple Axle - Tailroller |