Semi Cab Protector
An Alum-Line Semi Cab Protector is a heavy duty aluminum guard or rack installed right behind the cab of a semi or chassis cab truck to protect the cab, rear window, and driver from shifting loads. It’s built with rugged all aluminum construction, with a strong 6 inch I-beam mounting sill, rubber sealed doors, stainless steel latches/hinges, and optional compartments and accessories. This guard is used to secure chains, gear, tools, and cargo safely. Built with heavy gauge aluminum, you can expect many years of worry-free use.
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.
- All mainframe and mounting sill material is aircraft grade and MIG-weld construction
- Heavy duty .125 diamond plate protector plate with deeper corrugations for added strength
- Outside frame is 3" I-beam extrusions with 4" I-beam back side bracing, heavy duty 6" sills and gussets
- All main frame bracing is reinforced with gussets
- Tapered corners
Optional Features
Optional enhancements designed to tailor your build for specific jobs, loads, and real-world use cases.
- Chain hangers and trays (split)
- Chain hangers and trays (full width)
- Grate window assembly (opening 18"H x 27"W)
- Grab handles (per ft)
- T-handle lock box for securing chains and binders (18"D x 18"H x 30"W)
- (4) U-bolt mounting brackets
- (2) loading light brackets
- Ladder steps (for DROM)
- Plastic lining for chains (per sq ft)
- Key cylinder protective covers
Popular Sizes
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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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