Glulam longitudinal deck bridges are constructed using a series of glulam panels placed "side-by-side" to form the deck width that spans the length of the bridge. The deck is designed to resist all applied loads and deflections without additional supporting members or beams. However, transverse distributor beams are attached with mechanical fasteners to the deck underside to assist in load distribution between the panels. The panels for glulam longitudinal deck bridges are typically 225 to 360 mm deep and 115 to 180 mm wide. This type of bridge is economical and practical for maximum clear spans up to approximately 11 m. Longer crossings are achieved with continuous multiple spans. The low profile of these bridges also makes them desirable when vertical clearance below the bridge is limited.