Write a risk assessment for HOT WORK NEAR THE EDGE AREA OF A HIGH RISSING BUILDING

A suitable risk assessment and safe system of work (SSOW) for hot work near unprotected edges on a high-rise building should treat the job as a combined high-risk activity: hot work, work at height, falling-object exposure, and emergency rescue. The assessment should be site-specific and completed before work starts, then reviewed immediately before and during the task as conditions change. It should identify edge exposure, leading-edge conditions, lower-level exposure, combustibles, hidden voids, wind, access/egress, dropped-object paths, and rescue constraints. A written fall protection plan should be prepared for the site, covering the hazards, selected controls, equipment, inspection, use, dismantling, and rescue arrangements. [2] [1] [13]

Key hazards to assess and control:

• Falls from unprotected sides, edges, openings, balconies, decks, or leading edges to a lower level
• Swing-fall and inadequate anchorage risk when using personal fall arrest near an edge
• Fire or explosion from sparks, slag, hot metal, radiant heat, or smoldering debris contacting combustibles, flammable liquids, gases, ducts, voids, or lower levels
• Falling tools, welding rods, cut-off pieces, and debris striking workers or the public below
• Scaffold or MEWP instability, overloading, poor ground/support conditions, weather exposure, or unsafe access
• Fume, radiation, heat, and electrical hazards associated with welding/cutting operations
• Delayed rescue after a fall, including suspension trauma and difficulty retrieving an injured worker

[6] [7] [11] For permit-to-work, use both a hot work permit and a work-at-height / fall protection plan before starting. The hot work permit should confirm the exact location, task, time window, competent authorization, fire watch, fire extinguishers, combustible control, protection of openings and lower levels, equipment condition, and post-work fire watch. The fall protection plan should identify all edge and overhead hazards, the protection method to be used, procedures for assembly/inspection/use, tool and material securing, and prompt rescue arrangements. Work should not begin until both permits/plans are active and the area has been inspected. [10] [15] [13]

Safe system of work controls for the hot work area:

• Avoid hot work if a safer method can be used, such as off-site fabrication or cold cutting
• Establish an exclusion zone at the edge and below the workface; prevent unauthorized access to drop zones and public areas
• Inspect the area thoroughly before work starts, including walls, floors, ceilings, service penetrations, ducts, façade cavities, and lower levels
• Remove combustible and flammable materials from the area; if they cannot be removed, protect them with fire-resistant blankets or shields
• Protect holes, openings, cracks, and gaps so sparks and hot debris cannot travel to lower floors or concealed spaces
• Provide suitable extinguishers immediately available at the point of work and ensure workers know alarm and fire notification procedures
• Assign a dedicated fire watch who performs no other task during hot work and remains after completion for the required monitoring period
• Stop work in high winds, poor weather, unsafe lighting, changing site conditions, or if rescue/fire controls are no longer effective

[12] [12] [10] [15] For fall protection, use the hierarchy of controls: first install guardrails, barriers, covers, or control zones where practicable; where workers can still reach an unprotected edge, use a travel restraint system to prevent them from going over the edge; if restraint is not practicable, use a properly designed personal fall arrest system (PFAS) with a full-body harness, suitable anchorage, and compatible connecting components. Anchor locations must be planned before work begins, evaluated for strength, stability, and rescue suitability, and arranged to minimize free-fall and swing-fall. Body belts must not be used for fall arrest. [2] [14] [16] [4] [16]

Scaffolding or MEWP safety:

• Use scaffolds or MEWPs only where suitable for the task, load, reach, and rescue method
• Scaffolds must be erected on stable support, fully planked where required, tied/braced as needed, and inspected by a competent person before each shift
• Provide guardrails, midrails, and toe boards on scaffolds where required; use PFAS where guardrails alone are not sufficient or where required by the equipment/system
• Barricade the area below scaffolds or MEWP work to control falling-object exposure
• Do not use scaffolds or MEWPs in high winds, storms, icy conditions, or other adverse weather that could affect stability or safe welding operations
• For MEWPs, ensure operators are trained, use manufacturer-approved anchor points if tie-off is required, keep within rated capacity, and maintain safe clearance from power lines and structures

[11] [11] [11] [11] PPE for this work should be task-specific and based on the hazard assessment:

• Full-body harness and compatible fall protection equipment where required
• Protective helmet / hard hat with chin retention where appropriate for height work and falling-object exposure
• Welding helmet with correct filter lens, plus safety glasses with side shields underneath
• Face protection as needed for grinding, cutting, or hot metal exposure
• Fire-resistant clothing, long sleeves, long pants without cuffs, and welding leathers/aprons/sleeves as needed
• Suitable gloves for welding/cutting and handling hot materials
• Safety footwear with good grip and protection against hot work and dropped objects
• Hearing protection for overhead or noisy work
• Respiratory protection where fumes cannot be adequately controlled by ventilation and assessment

[10] [10] [10] [3] [1] A rescue plan is essential and must be specific to the edge location, access route, and fall protection system in use. It should state how rescue will be initiated, who is authorized to lead it, what equipment is immediately available, and how the casualty will be reached and recovered quickly. The plan should cover self-rescue where feasible, assisted rescue using ladder/MEWP/lifeline retrieval or rope-based methods as appropriate, first aid, medical treatment, and transport to hospital. Rescue equipment must be inspected, maintained, and available at the point of work. Reassess the rescue plan immediately before work begins to confirm it still matches site conditions. [1] [1] [4] [4]

For falling-object control, secure all tools, leads, hoses, cylinders, and materials; keep platforms tidy; use toe boards, debris nets, screens, or covered chutes where needed; and barricade the area below and adjacent to the work. Never allow hot cut-offs, rods, or slag to fall freely from height. Where public interfaces exist, use physical exclusion, signage, and, if necessary, temporary covered walkways or road/pedestrian controls. Good housekeeping is also critical because debris can both fall and fuel a fire. [13] [11] [7]

In terms of regulatory compliance, the work should comply with applicable construction safety legislation and standards governing fall protection systems, leading-edge work, PPE, worker training, equipment inspection/maintenance, rescue, and hot work controls. The cited materials indicate requirements for fall protection systems, fall protection plans, worker training, leading-edge systems, PPE duty to use, inspection and maintenance, and rescue personnel/procedures. In practice, compliance means using a competent person to prepare and supervise the plan, training workers in both hot work and fall protection, inspecting equipment before use, removing defective equipment from service, and enforcing the permit-to-work system. [5] [9] [8]

Practical minimum SSOW sequence:

1. Complete a site-specific risk assessment covering edge exposure, hot work, falling objects, access, weather, and rescue.
2. Issue and brief the hot work permit and fall protection/work-at-height plan.
3. Inspect scaffold/MEWP, PFAS, anchors, welding equipment, extinguishers, and rescue kit; remove defective equipment from service.
4. Establish guardrails/restraint/arrest systems, exclusion zones below, and dropped-object controls.
5. Remove or protect combustibles, seal openings and voids, and position extinguishers.
6. Assign a dedicated fire watch and confirm communication and emergency arrangements.
7. Carry out the work under supervision, stopping immediately if conditions change.
8. Maintain post-work fire watch and inspect the area, including lower levels and concealed spaces, before closing the permit.

[4] [12] [15]