Dual-Line Enclosed Cargo Trailers
Dual-Line Enclosed Cargo Trailers from Alum-Line are hybrid trailers — they are built to serve two functions: Enclosed cargo hauling (protecting contents from weather, theft, etc.). Ability to convert to an open utility trailer when needed The idea is you get the benefits of both, without having to own two trailers. The “Dual-Line” comes with a removable top. A perfect fit for many users.
Lightweight Strength That Outperforms Steel
High-strength aluminum delivers durability without unnecessary weight.
Proudly Made in the USA Since 1986
American-built trailers and work products trusted nationwide.
Designed for Commercial & Recreational Use
Built to handle demanding jobs, daily hauling, and custom applications.
Standard Features
Standard features engineered for strength, longevity, and everyday reliability.
- 4' inside height
- 5' inside width
- Non-skid tongue and groove aluminum extruded flooring
- Tubular side posts on 24" centers
- Removable livestock top to form flat deck utility
- .150 thick main frame deck construction
- Rear rubber dock bumpers across lower rear frame with skid plate
- 2,200# rubber torsion axles
- 14" tires on aluminum rims
- Electric brakes on each axle
- Center partition gate
- Easy latch hold backs on all doors and dividers
- Full opening back end gate with slide-by door
- 2" ball type coupler
- Side panel layout
- Two 5" air spaces towards top of trailer
- Air vents in front with hinged cover panels
- Enclosed electrical wiring with connections junction box
- 7 sealed beam marker lights
- 2 sealed beam stop/tail/turn lights
- L.E.D. light package
- Break-away switch, battery, and safety chains
- Castor wheel jack
Optional Features
Optional enhancements designed to tailor your build for specific jobs, loads, and real-world use cases.
- Height increase and decrease on 6" intervals (up to 5'6")
- 6' inside width
- Diamond plate floor with crossmembers on 12" centers
- Removable 5/8" vet pad mats
- 1/2" thick main frame deck construction
- 3,500# rubber torsion axles
- Aluminum rims with radial tires
- Spare tire and carrier
- Side escape door
- Side loading and unloading ramp
- Sliding door in center gate
- Extra gate with no door
- Extra gate with slide-by door
- Adjustable gate rail
- Head and shoulder stall dividers with removable pins
- Individual show pins
- Rear slide-by door with built-in fold-down ramp
- Double doors in rear opening
- Extra camlock on rear to swing rear door either end
- Smoked Lexan in air spaces
- Hinged cover panels over air spaces
- Aluminum 2-way roof scoops
- One inside dome light
- Extra marker lights
- Sealed beam reverse lights
- L.E.D. reverse light
- Trickle charger for breakaway battery
- Slide away ramps with storage
- Hayrack
- Tie rail on side of trailer
Popular Sizes
Popular Sizes include:
- This "one size fits all" trailer is available in 8', 10' & 12', lengths and 5' or 6' widths.
- Standard height is 5' with interior heights of 4' to 5'6" available.
See Our Products in Action
Get a closer look at the design, construction, and real-world performance behind every Alum-Line build.
Decades of experience, trusted by thousands—precision, strength, and reliability in every build.
American-built aluminum products designed for real-world work, backed by three core principles for every product delivered
Built on 40 Years of Proven Craftsmanship
Since 1986, Alum-Line has produced premium all-aluminum trailers, truck beds, bodies, boxes, and specialty transport solutions for customers across the U.S. Our decades of experience shape every weld, panel, and design we build.
USa Manufacturing Power That Sets Us Apart
With over 120,000 sq. ft. of production space, dedicated plants, and continuous expansion, Alum-Line delivers the strength, precision, and consistency needed for commercial-grade performance in every product.
Nationwide Network Backed for years
Supported by 200+ dealers across the country and protected by a five-year workmanship warranty, our aluminum solutions are engineered to outperform steel and built to last a lifetime.
Trailers Built For Hard Work Across America.
With years of hands-on experience and a commitment to quality craftsmanship, we turn raw materials into real-world solutions — from custom industrial parts to full-scale fabrication projects.
Years in Business
120,000 Sqft Manufacturing Facilities
Dealers Across the USA
Where Workmanship Lasts a Lifetime.
Specials
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New Products
Newly engineered additions built for tougher jobs and higher performance.
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