Fire protection systems can’t just look at panel combustion ratings. The fire resistance limit of suspended ceilings and partition walls is determined by panels, keels, filling materials, connection nodes and hole sealing. Material reports and system reports must be distinguished.

1. Confirm system boundaries

• Suspended ceiling: panels, joists, booms, filling materials and fixture closures.
• Partition walls: joists, panel layers, filling materials, door and window openings and joint treatments.
• The construction of system reports must be consistent with on-site construction.

2. Fire resistance limit design

Different fire resistance times correspond to different plate thickness, number of layers, keel spacing and filling density. You cannot replace the double-layer system report with a single-layer plate report, nor can you just upgrade the panel grade and ignore the keels and nodes.

3. Key nodes

Pipes, bridges, air ducts, inspection openings, lighting fixtures and deformation joints are vulnerable parts to fire protection. The sealing material should match the system, and the crossing parts should not be expanded at will. The sealing thickness and fixation method should be implemented according to the report.

4. Construction and acceptance

The panels are installed with staggered seams, the screws are firmly fixed, and the joint treatment and filling materials are continuous. Before concealing, check the keel spacing, number of plate layers, filling density and sealing photos, and keep traceable records.

5. Procurement acceptance list

• Check system test reports, material batches and sealed samples.
• Check that panels, joists, filling and sealing materials match.
• Keep node photos, concealed acceptance and material qualification certificates.
• Reconfirm the system structure and fire resistance level of the changed parts.

The quality of fire-resistant ceilings and partitions depends on the complete system, not a single material. Design, materials, construction and acceptance must form the same chain of evidence.