Inspection and Acceptance of Critical Components of Construction Hoists

The fall arrestor is a crucial component of construction hoists. It significantly enhances the safety factor of hoists, allowing them to carry both loads and people. In many regions, inspection requirements have been tightened. Inspections are now generally required annually, regardless of usage. Hoists must also undergo a fall test every three months during operation to verify the performance of the fall arrestor. While the requirements for fall tests are clear, actual implementation is often less than ideal. The condition of the fall arrestor cannot be determined during normal operation and can only be assessed through inspections and periodic tests. Ensuring the performance of fall arrestors during daily operations is essential to prevent serious accidents.

Safety switches on hoists are designed with safety in mind, including limit switches, overload switches, and anti-slack rope switches. On some construction sites, to save time, some limit switches are intentionally removed, short-circuited, or left unrepaired after damage, effectively eliminating these safety measures and creating accident hazards. For example, each door on the hoist cage has a limit switch. When any door is opened abnormally, the hoist cage cannot be started or stops immediately. However, if the door limit switch or top door limit switch is intentionally removed to accommodate oversized loads, this is a dangerous violation that endangers lives. To prevent accidents, it is necessary to strengthen daily supervision and management, strictly require hoist maintenance and operating personnel to regularly check the safety and reliability of various safety switches, and prevent accidents from occurring.

The hoist attachment brackets are used to connect the track frame to the building and ensure the stability of the track frame. The attachment brackets should be made of the materials and specifications specified in the manufacturer's instructions and should not be arbitrarily modified. The spacing of the attachment brackets should comply with the requirements in the instructions, typically 6 meters apart. The connection and fastening methods of the attachment brackets should follow the instructions and should not be changed at will. Safety inspections often reveal the use of steel bars instead of bolts, with steel bar ends welded to replace nuts, and self-made attachment brackets without calculations or approval from the original manufacturer.