The installation of non‑removable bottom‑form steel truss floor decking must strictly adhere to relevant codes and standards to ensure structural safety and construction quality. The following notes, organized by key stages, outline important considerations.

　　Construction Preparation and Material Inspection: Prior to installation, verify the design drawings, conduct a technical briefing, and ensure that all necessary materials and tools—such as cranes and levels—are fully prepared. At the same time, inspect the floor slab foundation for flatness and load-bearing capacity, remove surface debris, and confirm there are no defects that could impede installation. With regard to materials, ensure that the floor decking complies with national standards, avoid using substandard products, and stack them by specification, keeping each stack no higher than 1.2 meters and limiting it to no more than seven layers to prevent deformation.

　　Lifting and Transportation Protection: During lifting, U‑shaped wooden support strips should be installed on both the top and bottom of the floor deck to maintain balance at both ends; the recommended spacing between lifting points is 1.6 meters. For transportation and stacking, consider the crane’s operating radius to minimize secondary handling, and use square timber pads or similar measures to prevent deformation.

　　Installation, Positioning, and Fixing: Prior to installation, mark positioning lines on the steel beams according to the panel layout drawing, ensuring that the first floor deck panel is aligned with the reference line. At template overlaps, maintain uniform spacing (e.g., 20 mm) and secure using pop rivets or spot welding. The end of the steel‑reinforced truss shall extend into the steel beam by at least 50 mm, and the bottom chord node must rest on the support, with a clearance of no less than 20 mm; otherwise, end‑support provisions must be provided. Edge formwork shall be spot‑welded to the steel beams at intervals of approximately 300 mm, and edge strips shall be used to seal joints and prevent grout leakage.

　　Reinforcement Work and Temporary Supports: After laying a specified area, promptly tie and secure the connecting reinforcement, bearing reinforcement, and vertical reinforcement using double‑wire, double‑loop ties to prevent lateral instability of the trusses. Prior to concrete placement, install temporary supports—particularly when end or intermediate bearings cannot adequately accommodate the support requirements—to ensure the stability of the floor deck.

　　Concrete Pouring and Subsequent Treatment: During pouring, control the concrete’s workability, ensure uniform placement to prevent excessive local buildup, and vibrate promptly to achieve dense compaction. After pouring, cure the concrete in accordance with standard procedures, and remove formwork once the specified strength is attained. When drilling openings or cutting steel‑truss reinforcement, proceed only after the concrete has reached its design strength, and provide temporary support for protection. Finally, clean up the site and inspect the slab surface for any defects.