Category: Safety & quality
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
Hot work is any activity that produces flame, sparks or high heat, such as welding, oxy-cutting, grinding and torch-applying waterproofing. It needs a permit, removal of combustibles, an extinguisher nearby and a fire watch that stays after the work ends.
Why it matters on a project
Many site fires start from a welding spark landing on insulation or cardboard, sometimes an hour after work finished.
Measurement and pricing
Within safety costs: extinguishers, fire blankets and the fire watch.
Common mistake
Leaving the area right after welding without a fire watch, so a smouldering spark starts a late fire.
Frequently asked questions
How long does the fire watch stay after welding?
The permit system sets it, often at least 30 to 60 minutes after work ends.
Is torching waterproofing hot work?
Yes, it uses an open flame and needs a permit and a nearby extinguisher.
Related terms
- Permit to workWritten authorisation for hazardous work (hot work, work at height, confined spaces) under set conditions.
- Bitumen membraneModified bitumen waterproofing rolls bonded by torch.
- Steel connectionsHow steel members are joined by bolts or welding.
- Risk assessmentIdentifying hazards in each activity, estimating likelihood and severity and setting controls before work starts.
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