bedside

The bedside is the vertical panel that forms one of the long sides of a truck bed, running from the cab back toward the tailgate. It serves as the primary structural barrier that contains cargo and prevents it from shifting laterally or falling overboard during transport. On most light-duty trucks, bedsides are typically 18 to 24 inches tall, though heavy-duty commercial vehicles may have bedsides extending 36 inches or higher.

Bedsides are manufactured from various materials depending on the truck class and intended use. Steel bedsides, either welded tube frames with wood slats or full sheet steel, are standard on work trucks and commercial vehicles because they tolerate repeated loading and corrosion exposure. Wood bedsides, composed of dimensional lumber (usually hardwood slats in a steel frame), remain common on agricultural and utility trucks because they are repairable, provide good grip for cargo, and cost less than steel. Aluminum bedsides appear on higher-end or specialty trucks where weight reduction matters.

Damage to bedsides happens through mechanical impact, corrosion, and fatigue. Impact damage occurs when cargo shifts violently during braking or cornering, or when loading equipment strikes the panel. Rust attacks steel bedsides from road salt, moisture, and scratches that expose bare metal. Wood bedsides rot where water pools at the base frame connection or where slats crack. Welded joints, particularly where the bedside connects to the bed floor structure, crack from repeated flexing under load.

Bedside systems and aftermarket options

Replacement and modification of bedsides is routine maintenance and customization work. Aftermarket suppliers offer bolt-on composite bedsides, reinforced steel variants with integrated tie-down slots, and removable livestock-style panels for commercial use. Some truck owners upgrade to full-height bedsides (often called drop sides or swing-out panels) that fold down to ease loading of tall or long cargo. Spray-on bedliners protect wood and steel alike, though they require application before the bedside begins to fail.

The term bedside derives simply from its position as the side of the bed (the load-carrying platform of the truck), distinguishing it from the cab, frame, or running gear. In trade usage, bedsides are counted by pair (a truck has two bedsides, one on each long edge) and specifications for replacement always include the mounting configuration, height, material, and whether the bed incorporates rails or stake pockets along the top edge.