Write a risk assessment for window glass cleaning high rise building

A suitable risk assessment and safe work method statement for high-rise window and facade cleaning should be written before work begins, be specific to the site, identify all fall and dropped-object hazards, define the work locations where suspended access or rope descent will be used, and include step-by-step controls and self-rescue provisions. The plan should be developed by the employer or a qualified individual, reviewed with workers and the building owner or agent, and evaluated on site during implementation. [1] [1] [5]

Key hazards to assess:

• Falls from roof edges, parapets, suspended platforms, boatswain's chairs, rope descent systems, and during transfer to or from access equipment
• Failure or misuse of suspension ropes, lifelines, anchors, tiebacks, hoists, descent devices, rope grabs, or connectors
• Swing falls, inadequate clearance below, and contact with sharp edges that can damage ropes or lifelines
• Dropped tools, buckets, squeegees, glass debris, and water runoff affecting people below
• Weather hazards including high winds, reduced visibility, rain, ice, lightning, heat, and cold stress
• Rescue complications such as suspension trauma, worker injury, or inability to self-rescue

[2] [1] [15] [8] For access selection, use the safest feasible method first. Portable ladders, supported scaffolds, or aerial lifts may be preferable where they can safely reach the work. Suspended access should be used when those methods are not feasible or safe for the conditions. For high-rise facade cleaning, common systems include adjustable suspension scaffolds, boatswain's chairs, and rope descent systems. Rope descent systems support one worker in a chair or seat board and allow controlled descent and stopping at any level. [2] [2] [1] [12]

Before setup and use, a competent person should inspect the building exterior and access route, and a qualified person should be involved where design, anchorage selection, horizontal lifelines, or specialized rope systems are required. Inspect parapets, edges, cornices, roof surfaces, davits, outriggers, tiebacks, and all anchor points. Protect ropes and lifelines from sharp edges with secured padding, and remove defective equipment from service immediately. [1] [1] [3] [9] [13]

Fall prevention and fall arrest controls:

• Use prevention first where possible: guardrails, warning barriers/control zones, covers, and travel restraint to keep workers from reaching an unprotected edge
• Where exposure remains, each worker should use a personal fall arrest system with a full body harness, suitable anchorage, and compatible connector system
• Each worker on a suspended platform should be attached to an independent fall arrest system or separate lifeline
• Use separate vertical lifelines for each employee; keep lifelines hanging freely and compatible with the rope grab
• Ensure anchorages for personal fall protection are independent from anchorages used to suspend the platform or worker
• Use only automatic-locking snaphooks/carabiners; avoid incompatible connections and improvised tie-offs
• Rig systems to minimize free fall and swing fall, and verify adequate clearance below

[5] [3] [4] [3] [3] [3] [16] Minimum equipment criteria for commercial facade cleaning should include properly rated anchors, lifelines, connectors, and harnesses. OSHA-based criteria in the supplied documents require lanyards and vertical lifelines with a minimum breaking strength of 5,000 lb, D-rings/snaphooks/carabiners capable of sustaining 5,000 lb, and anchorages capable of supporting at least 5,000 lb per attached employee unless designed by a qualified person. Full body harnesses are preferred for fall arrest, and rope grabs or self-retracting devices must be compatible with the lifeline and application. [3] [3] [3] [16] [16]

Dropped-object controls should be built into the method statement. Establish and barricade drop zones below the work, control public access, schedule work to reduce pedestrian exposure, and secure all tools and loose items. Use toeboards or platform edge protection where applicable, tether hand tools, manage hoses and buckets, and stop work if items cannot be secured. The written plan should specifically identify hazardous areas or drop zones and the step-by-step controls for each. [1] [15] [4]

Weather must be treated as a dynamic stop-work factor. High winds can move suspended platforms, destabilize workers, blow debris, reduce visibility, and increase the risk of broken glass, dropped objects, and scaffold or equipment failure. Commercial facade cleaning operations should define measurable weather limits in the SWMS, monitor forecasts and actual conditions throughout the shift, and suspend work during unsafe wind, lightning, storms, ice, heavy rain, or any condition that affects control of the worker, platform, or rescue capability. [15] [6] [9]

PPE for facade cleaning crews and rescuers should typically include:

• Full body harness with compatible lanyard, rope grab, or self-retracting lifeline as required by the access method
• Head protection with chin strap where there is risk of dropped objects or loss during suspension work
• Eye protection against splash, dust, and windborne debris
• Protective gloves suitable for rope handling, glass contact, and chemical exposure from cleaning agents
• Non-slip safety footwear appropriate for wet roofs and suspended platforms
• High-visibility clothing where work interfaces with traffic, loading areas, or public spaces
• Weather-appropriate clothing for cold, heat, rain, or wind exposure

[10] [6] [14] [17] Emergency rescue procedures must be preplanned, written, practiced, and immediately deployable. Do not rely solely on calling public emergency services. The rescue plan should identify rescue roles, initiation and communication methods, equipment on site, first-aid arrangements, hospital route, and methods suitable for the facade and access system, such as self-rescue, assisted descent, retrieval using the lifeline, aerial platform rescue, or rope rescue by trained personnel. Workers suspended after a fall must be rescued immediately because suspension trauma can develop within minutes. [7] [8] [8] [8] [9]

For OSHA and HSE-style compliance, the operation should demonstrate: a documented hazard assessment; a site-specific fall protection and rescue plan; competent-person inspections; qualified-person design or supervision for anchors and horizontal lifelines; worker training and supervision; inspection and maintenance of PPE and access equipment; and use of personal fall protection systems that meet applicable performance requirements. In practical terms, compliance means the employer can show that the chosen access method, equipment, anchorages, rescue arrangements, and exclusion zones are suitable for the building and the day’s conditions. [11] [17] [14] [3]

Recommended control measures for a commercial facade cleaning SWMS:

1. Survey the building, facade geometry, roof access, anchor locations, public interface, and rescue constraints before mobilization.
2. Prepare a written risk assessment and SWMS identifying work zones, drop zones, access method, fall hazards, weather limits, PPE, communications, and rescue procedures.
3. Have a competent person inspect the building exterior and all equipment before use; involve a qualified person for anchor/horizontal lifeline design and specialized rope systems.
4. Use the safest feasible access method; only use suspended access or rope descent where other safer methods are not feasible or safe.
5. Install independent personal fall arrest protection for each worker, with separate lifelines where required and independent anchorages from suspension lines.
6. Protect ropes and lifelines from edges, verify compatibility of connectors and rope grabs, and inspect all components before each shift and during use.
7. Barricade and control the drop zone below, tether tools, secure materials, and coordinate with building management to isolate entrances, sidewalks, and loading areas.
8. Apply strict weather monitoring and stop-work criteria for wind, lightning, storms, ice, poor visibility, or any condition that compromises safe suspension or rescue.
9. Ensure workers and rescuers are trained, competent for the system used, and understand self-rescue, assisted rescue, and emergency communications.
10. Keep rescue equipment immediately available on site, rehearse the rescue plan, and review the plan whenever conditions, equipment, or work scope change.

[1] [1] [3] [9] [8]