Introduction: Scaffolding Safety Must Not Be Overlooked

As an indispensable temporary structure in construction, equipment maintenance, and high-altitude operations, the safety of scaffolding directly impacts workers' lives and project progress. Statistics indicate that approximately 15% of global construction accidents involve scaffolding, with most incidents stemming from improper erection and inadequate inspections. This document provides a comprehensive step-by-step erection guide and a system of critical inspection points to help you establish a safe and reliable scaffolding operation process.

Part One: Pre-Erection Preparation—Safety Starts with Planning

1.1 Risk Assessment and Plan Development

Before erecting scaffolding, a comprehensive risk assessment must be conducted:

• Environmental Assessment: Inspect ground conditions (load-bearing capacity, levelness, drainage) and surrounding environment (power lines, traffic flow, adjacent structures)

• Usage Analysis: Determine purpose (construction, maintenance, decoration), anticipated loads (personnel, materials, equipment), and duration of use

• Solution Design: Select scaffolding type (coupling-type, gate-type, bowl-coupling-type, etc.) based on assessment results; prepare detailed erection drawings

1.2 Personnel Qualification and Training Verification

Ensure all personnel involved in scaffolding operations:

• Hold valid scaffolding erection qualification certificates

• Have undergone recent safety training

• Understand the specific risks and safety measures for this operation

• Are physically fit for working at heights

1.3 Material and Equipment Inspection

Key Inspection Point 1: Material Receiving Inspection

• Inspect all steel pipes for bending, cracks, severe rust, or wall thickness reduction exceeding 10%

• Verify fittings are free of cracks and deformation, with bolts sliding smoothly

• Inspect scaffold boards for rot or fractures; ensure metal boards show no severe deformation

• Confirm safety nets, guardrails, and other protective equipment comply with national standards

Part Two: Step-by-Step Implementation Guide—Systematically Building Security Foundations

2.1 Step 1: Foundation Preparation and Base Installation

1. Ground Preparation: Clear debris, level the ground, and compact as needed.

2. Foundation Setup: On soft ground or insufficient bearing capacity, lay base plates (thickness ≥5cm, width ≥20cm).

3. Base Installation: Position adjustable bases accurately, ensuring all bases are on the same horizontal plane with height differences controlled within 2cm.

Key Inspection Point 2: Foundation and Base

• Does the ground bearing capacity meet requirements (typically ≥80 kPa for scaffolding)?

• Are base plates laid level and free of overhangs?

• Is the base adjustment range within safe limits?

2.2 Step Two: Upright Pole Erection and Verticality Control

1. First-level uprights: Arrange uprights according to the design plan, ensuring accurate spacing (typically 1.5–2m).

2. Verticality Correction: After every two steps of erection, verify verticality using a theodolite or plumb line, controlling deviation within H/400 (where H is the scaffold height).

3. Step-by-Step Erection: Proceed upward sequentially, ensuring vertical pole extensions use butt couplers with adjacent joints staggered by at least 50 cm.

2.3 Step Three: Horizontal and Sweeping Rod Installation

1. Sweeping Rod Installation: Install longitudinal and transverse sweeping rods at a height ≤20cm above ground level.

2. Horizontal Rod Installation: Install longitudinal and transverse horizontal rods at specified spacings (typically 1.8m).

3. Connection Inspection: Ensure all horizontal rods are securely connected to vertical posts with no omissions.

Key Inspection Point 3: Member Connections

• Is the tightening torque of fastener bolts within 40-65 N·m?

• Are member joints staggered as specified?

• Are horizontal members installed continuously without gaps?

2.4 Step Four: Scaffolding Board Installation and Working Level Setup

1. Scaffolding Board Installation: Working levels and the level directly below must be fully covered with scaffolding boards.

2. Installation Requirements: Boards must be securely fastened to crossbars with overhang ≤15cm, laid flat without warping.

3. Inter-level Protection: Install fall arrest nets or isolation layers beneath working levels.

2.5 Step Five: Installation of Diagonal Braces and Wall Ties

Diagonal Brace Configuration:

• Scaffolding under 24m height: Install one diagonal brace at both ends, corners, and every 15m along the mid-span.

• Scaffolding over 24m height: Install continuous diagonal braces across the entire facade.

• Angle Control: Maintain a ground angle of 45°-60°.

Wall Tie Installation:

• Arrange in “two steps, three spans” or “three steps, three spans” configurations (based on scaffold height)

• Prioritize rigid connections; when flexible connections are necessary, increase installation density

• Ensure reliable connection to the main structure; do not connect directly to scaffold members

Key Inspection Point 4: Stabilization System

• Are scissor braces continuously installed to the top, with angles compliant?

• Do the quantity and placement of wall ties meet design requirements?

• Are wall ties effectively loaded without any signs of loosening?

2.6 Step Six: Installation of Safety Protection Facilities

1. Guardrails and Toe Boards: Install 1.2m-high guardrails and 18cm-high toe boards along the outer perimeter of the work platform.

2. Safety Netting: Install full-coverage close-mesh safety netting on exterior facades, with horizontal safety nets positioned below the work platform.

3. Access Routes: Provide dedicated ramps or ladders with a slope ≤1:3, equipped with anti-slip strips and handrails.

Part Three: Key Inspection Point System—Establishing a Multi-Level Verification Framework

3.1 Routine Inspections (Before Work)

Inspection Items:

• Weather Conditions: After severe weather such as high winds (Force 6 or above), heavy rain, or heavy snow

• Foundation Condition: Check for settlement, water accumulation, or frost heave

• Wall Tie-Bars: Check for loosening or missing components

• Protective Equipment: Verify integrity of safety nets and guardrails

3.2 Routine Inspections (Weekly/After Each Lift)

Inspection Checklist:

· Overall vertical deviation (≤H/400 and ≤100mm)

· Tightness of all fastener bolts

· Member deformation (bending ≤L/150 and ≤10mm)

· Load conditions: Overloading or uneven distribution

Electrical safety: Clearance from electrical lines (≥ minimum safety distance)

3.3 Special Inspections (Monthly/Following Special Incidents)

Key Points for In-Depth Inspection:

• Material corrosion condition (wall thickness measurement)

• Foundation settlement observation records

• Assessment of wall tie stress state

• Overall stability analysis

Key Inspection Point 5: Documentation

• Verify completeness and accuracy of inspection records

• Confirm closed-loop management of corrective actions

• Ensure inspection personnel sign off on documentation

Part Four : Safety Management During Use

4.1 Load Control

• Clearly mark the maximum allowable load of the scaffolding

• Distribute stored materials evenly to avoid concentrated loads

• Conduct specialized assessments for heavy equipment placement on scaffolding

4.2 Personnel Conduct Standards

• Use designated access points when ascending or descending scaffolding

• Secure safety harnesses during operations (high anchorage, low usage)

• Running or jumping on scaffolding is prohibited

• Unauthorized removal of scaffolding components or protective devices is prohibited

4.3 Adverse Weather Response

• Develop emergency plans specifying conditions for halting operations

• Reinforce wall ties before high winds; add guy wires when necessary

• Inspect foundation settlement and component stability after rainfall

Part V: Demolition Safety Procedures

5.1 Pre-Demolition Preparation

• Conduct a comprehensive inspection of the current condition of the scaffolding

• Remove all debris and loads

• Establish a restricted access zone and set up warning signs

5.2 Demolition Sequence Principles

“Demolish later what was erected later; demolish first what was erected first”:

1. Protective equipment such as safety nets, guardrails, and scaffolding planks

2. Scissor braces (removed concurrently with dismantling)

3. Horizontal crossbars and vertical crossbars

4. Upright poles and wall ties (removed simultaneously as the final step)

5.3 Key Safety Points During Dismantling

• Strictly prohibit throwing poles from heights

• Ensure at least two personnel work in coordination

• Wall ties must be removed layer by layer with the scaffolding; premature removal is strictly prohibited

Conclusion: Building a Safety Culture, Not Merely Following Procedures

The step-by-step guide and key checkpoints provided herein offer a systematic framework. However, true safety assurance stems from:

1. Continuous Education: Ensuring every worker understands “why”—not just “how”

2. Accountability Implementation: Establishing clear chains of responsibility for inspection, maintenance, and oversight

3. Transparent Communication: Creating an accessible mechanism for reporting safety concerns

4. Technical Updates: Staying abreast of new technologies and materials in scaffolding

Remember, in the realm of scaffolding safety, there is no room for “close enough.” Every meticulously conducted inspection and every rigorously controlled detail has the potential to prevent a serious accident. Building scaffolding safely protects not only the progress of the current project, but also the families and futures of every worker behind it.