The types segment classifies Ceiling Joists by material construction, typically into Wooden, Steel, Engineered Wood, and Composite categories. Wooden joists, primarily solid timber, hold the largest share within the type hierarchy, estimated at 45% of market volume, due to their cost‑effectiveness and ease of installation in low‑rise structures. Steel joists, comprising about 35% of the market, are favored in high‑rise and commercial projects where higher strength‑to‑weight ratios and fire resistance are critical. Engineered Wood products—such as laminated veneer lumber (LVL) and I-joists—capture roughly 15% of the market, offering dimensional stability and reduced material waste for mid‑rise applications. The remaining 5% is occupied by Composite joists, which blend wood and steel or incorporate polymer cores to achieve specific performance criteria. Each type contributes distinct cost, performance, and regulatory implications, shaping the overall market taxonomy and influencing procurement strategies across the sector.