Dismantle Scaffolding

Dismantling scaffolding is a high-risk phase in construction projects, which requires strict compliance with safety specifications and technical requirements to ensure the safety of personnel and the surrounding environment. The following is a detailed guide for dismantling scaffolding:

I. Preparation Before Dismantling

1. Formulate a Dismantling Plan

Develop a special dismantling plan based on the scaffolding type (e.g., coupler-type, disk-lock type, cantilever type), height, load, and on-site environment.

Clearly define the dismantling sequence, methods, safety measures, and emergency response plans, and obtain approval from the project technical director.

2. Safety Technical Disclosure

Conduct written safety technical disclosure for operators, specifying dismantling steps, hazard points, and protection requirements.

Ensure all participating personnel are familiar with the plan and sign for confirmation.

3. On-Site Inspection and Cleaning

Inspect the integrity of scaffolding components such as connectors, vertical poles, and horizontal poles, and mark damaged or loose parts.

Remove residual materials, tools, and debris from the scaffolding to prevent injuries caused by falling objects during dismantling.

Delimit a warning area, set up warning signs, and prohibit non-operating personnel from entering.

4. Preparation of Tools and Equipment

Equip with special tools (e.g., wrenches, crowbars, hoisting equipment) and check their safety.

Prepare personal protective equipment (e.g., safety belts, safety helmets, non-slip shoes).

II. Dismantling Principles and Sequence

1. Basic Principles

Dismantle from top to bottom, layer by layer: It is strictly forbidden to work simultaneously at upper and lower levels or push down the scaffolding as a whole.

Remove later-installed components first, then earlier-installed ones: Follow the reverse order of erection to ensure structural stability.

Segmented dismantling: For high-rise or complex scaffolding, dismantle by area and phase.

2. Typical Dismantling Sequence

Standard sequence: Safety nets → Scaffold planks → Protective railings → Horizontal poles → Vertical poles → Wall connectors (reinforcement is required when dismantling wall connectors last).

Cantilever scaffolding: First dismantle the diagonal tie rods on the cantilever beam, then dismantle the frame layer by layer.

Attached lifting scaffolding (climbing scaffolding): Operate in accordance with the manufacturer’s instruction manual to ensure the safe release of the lifting system.

III. Key Safety Measures

1. Personnel Protection

Operators must wear safety belts and safety helmets; the ropes of safety belts shall be fixed to reliable positions.

When working at heights, set up fall arresters or lifeline systems.

2. Structural Stability Control

During dismantling, maintain the stability of the remaining part of the frame to avoid unbalanced loads or impacts.

Wall connectors shall be dismantled layer by layer along with the frame; it is strictly forbidden to remove multiple wall connectors in advance.

3. Material Handling and Stacking

Dismantled components shall be transported via vertical transportation equipment (e.g., tower cranes, freight elevators) or pulley blocks; throwing is strictly prohibited.

Classify and stack materials neatly, and clean the site in a timely manner to avoid debris accumulation.

4. Weather and Lighting

Immediately stop dismantling operations in severe weather such as gales (force 6 or above), heavy rain, or heavy snow.

Adequate lighting shall be provided for night operations, and special personnel shall be assigned for supervision.

IV. Key Points for Dismantling Special Scaffolding

1. Cantilever Scaffolding

First dismantle the diagonal tie rods on the cantilever beam, then the main beam.

Ensure the load-bearing capacity of the cantilever layer structure meets requirements to avoid overloading.

2. Attached Lifting Scaffolding

Release lifting devices such as electric hoists and guide rails to ensure complete separation of the frame from the building.

Set up temporary supports during dismantling to prevent frame overturning.

3. Formwork Support Scaffolding

After separating from the concrete structure, dismantle horizontal poles and vertical poles in accordance with the principle of "removing later-installed components first".

Avoid premature dismantling to prevent structural deformation.

V. Emergency Handling and Accident Prevention

1. Common Risks

Collapse: Caused by incorrect dismantling sequence or premature removal of wall connectors.

Fall from heights: Failure to wear safety belts or insecure fixation of safety belts.

Object striking: Injuries caused by falling materials or tools.

2. Emergency Measures

In case of collapse, immediately activate the emergency plan, organize personnel evacuation, and report the incident.

Equip with first-aid kits, stretchers, and other equipment to ensure timely treatment of the injured.

Conduct regular emergency response drills to improve the emergency response capabilities of operators.