Structural Concerns



Deflection

This is a major concern as excessive deflection can damage the roof structure or equipment. The acceptable deflection limit depends on the design specifications and the materials used. Typically, it should be limited to a fraction of an inch to avoid damage.

Stability

Ensure that the roof structure is stable during the jacking process. Lateral braces or temporary supports may be necessary to prevent swaying or buckling.

Connections

Verify that all connections between the roof elements and supporting structure are securely fastened and capable of withstanding the jacking forces.

Load path

Ensure that the load path for jacking forces is properly established through the supporting structure to the ground.

MEP Concerns



Equipment integrity

Protect and support all MEP equipment (HVAC, electrical, plumbing) from damage during the jacking process. Ensure that piping, ductwork, and wiring are properly secured and not subjected to excessive stress.

Air and water infiltration

Keep the roof area weathertight during the jacking and lifting process. Install temporary coverings or enclosures to prevent wind and rain from entering.

Electrical grounding

Maintain proper electrical grounding throughout the jacking process to prevent electrical hazards.

Additional Considerations



Monitoring

Install sensors to monitor deflection, stability, and other critical parameters during the jacking process. This will allow for real-time adjustments if necessary.

Safety

Establish a comprehensive safety plan to protect workers and bystanders during the jacking operation. Use proper PPE and adhere to all safety protocols.

Coordination

Coordinate closely with the contractors responsible for jacking, structural support, and MEP installation to ensure a smooth and safe process.

Documentation

Keep a detailed record of the jacking process, including any adjustments, readings, and observations. This will provide valuable information for future reference and analysis.

General Recommendations: Consult with a qualified engineer to determine the acceptable deflection limit for the specific roof structure. Use high-capacity jacks capable of lifting the weight of the roof safely and efficiently. Jack the roof in increments to minimize deflection and allow for adjustments. Monitor the roof structure and MEP equipment closely during the jacking process. Communicate clearly with all involved parties and ensure everyone understands the safety procedures. Flag for review