2025-05-21    84

In steel structure mezzanine construction sites, space constraints often make it difficult to transport main beams into position. Beams may need to be segmented externally before being connected and hoisted into place manually with limited mechanical assistance.

1. Anchoring System (Rooting)
   The anchoring system serves as the fundamental safety element - transferring loads from the new mezzanine through main beams to the original structure, much like tree roots stabilizing a trunk. Critical considerations include:

• Conduct thorough assessment of base material hardness, thickness, and reinforcement layout

• Use core drilling methods that minimize damage to structural reinforcement

• Strictly adhere to specified hole depth/diameter requirements

• Select anchor bolts based on calculated roof loads

• Clean drill holes meticulously before bolt installation

• Control installation speed (2000-3000 rpm) for optimal adhesive mixing

• Implement post-installation curing periods according to ambient temperature

• Design anchor plates with appropriate thickness and area, considering potential reinforcement conflicts

• Conduct pull-out tests on random anchor samples

• Fill gaps between anchor plates and concrete members with grout or epoxy

• Allow complete curing before applying structural loads

2. Main Beam Selection
   Key factors for main beam configuration:

• Select appropriate sections (I-beams, H-beams, or box sections) based on span and load requirements

• Consider fabrication constraints:
  • Surface preparation (grinding/rust removal)
  • Precision cutting
  • Priming treatment

• Prefer standard rolled sections for shorter spans to avoid complex welding

• Conduct field measurements before final cutting

• Account for transportation and hoisting challenges

3. Connection Methods
   Primary connection techniques:
   A. Welding:

• Implement groove welding for joint preparation

• Follow specified welding procedures
  B. High-strength Bolting:

• Use pre-tensioned friction connections

• Ensure proper surface treatment

Construction Safety Measures:

1. Personal Protection

• Mandatory safety helmets in work areas

• Fall arrest systems for elevated work

• Designated smoking areas

2. Site Safety Management

• Regular inspection/upgrading of:
  • Fire prevention systems
  • Guard railings
  • Fall protection equipment

• Winter-specific measures:
  • Ice/snow removal from access routes
  • Anti-slip materials (straw mats/wooden planks)
  • Frostbite prevention protocols

3. Electrical Safety

• Grounding protection for heating elements

• Prohibition of unauthorized heating devices

4. Fire Prevention

• Fire watch personnel for hot work

• Combustible material isolation

• Permit-controlled ignition sources

5. Material Handling

• Proper rigging procedures for manual beam placement

• Segmented transportation planning for confined spaces

6. Quality Control

• Non-destructive testing of critical connections

• Dimensional verification before hoisting

• Load testing verification

This comprehensive approach addresses both technical challenges and safety management requirements for steel mezzanine construction in constrained environments, ensuring structural integrity while maintaining safe working conditions.