Demolition of Prefabricated Main Beams in Houses

Caution should be exercised when demolishing prefabricated main beams in houses. Generally, it is not advisable to remove them randomly, especially those involving load-bearing structures, as doing so may be illegal and pose a threat to the safety of the building.

Preparations Before Demolition

• Understand the Structure and Environment: Gain a detailed understanding of the structural position of the main beam and its surrounding environment. Determine a safe distance and clear away any debris and obstacles around it to create safe and smooth conditions for construction.
• Prepare Tools and Equipment: Prepare necessary hand tools, power tools, and protective materials. For example, a heavy hammer is used to remove the connection modules of the main beam, while power tools or manual cutters are used to cut the fastening screws at the connection points of the main beam.
• Recruit Professional Workers: Recruit experienced workers for the demolition operation to ensure they are familiar with the demolition process and safety regulations and can operate correctly to avoid unnecessary damage and danger.

Steps in the Demolition Process

• Clear Supporting Objects: First, remove all objects supporting the beam below to prevent damage to the supports during demolition and ensure demolition safety.
• Remove Connection Modules: Use a heavy hammer and other tools to remove the connection modules of the main beam.
• Cut Fastening Screws: Use power tools or manual cutters to cut the fastening screws at the connection points of the main beam and remove them from the beam.
• Remove Triangular Supports: Arrange two people on both sides according to the length of the beam to split and remove all triangular supports on the beam.
• Safely Support the Main Beam: Use a jack to safely support the beam to ensure it does not suddenly fall during demolition.
• Demolish the Main Beam into Pieces: Finally, use an electric separator or suspended fire rope burning to demolish the beam into small pieces and lift them to the ground.

Post-Demolition Handling

• Handle Residues: Properly sort and handle the remaining wood materials, and recycle or dispose of them through professional agencies to avoid resource waste and environmental pollution.
• Clean Up Garbage and Waste: Promptly clean up the garbage and waste left during the demolition process to maintain the cleanliness of the construction site and avoid harm and pollution to the environment and personnel.

In addition, in rural self-built houses, for lintels above doorways (some of which fall under the category of prefabricated main beams), especially those above the main entrance of the living room in self-built houses, which are generally longer than 4 meters, they must not be removed. Once removed, they will pose a threat to the entire roof.