Vehicle cabins encompass the fully assembled interior structural framework beyond the chassis, typically comprising the roof, floor pan, and associated support members. These components define the passenger/cargo enclosure and are critical for structural rigidity and safety cell integrity. Cabin assemblies are commonly constructed from high-strength steel or aluminum alloys, often incorporating integrated sound dampening materials. Variations include complete pre-welded structures, partial assemblies for restoration, or individual panels for localized repair. Precise fitment and weld geometry are paramount for maintaining crashworthiness and vehicle dimensions. Component materials must meet OEM specifications for gauge, tensile strength, and corrosion resistance.