Hotworks Fire Prevention

Guidance Document for Fire Prevention During Cutting and "Hot Works" Operations


This procedure has been prepared as a guide for contractors, building maintenance, and equipment repair personnel (including persons who perform cutting and welding), fire watchers, their supervisors (including outside contractors), and building manager on whose property cutting and welding is to be performed.


This standard covers provisions to prevent loss of life and property from fire in the use of oxy-fuel gas and electric arc cutting and welding equipment.


Before any welding or cutting is begun personnel shall

Before cutting and/or welding, a "hot works" permit must be obtained from designated* UT Representative. The area shall be inspected by the supervisor responsible for the work and if necessary by Physical Safety personnel to ensure that:

* Designated UT representatives must attend annual training provided by the University physical safety representative.

Hot Works Permit

Prior to issuing a hot works permit the area will be inspected by the health science center designated representative.

Before cutting or welding is permitted and at least once per day while the permit is in effect, the area shall be inspected by the health science center designated representative to ensure that it is a fire safe area. This individual shall designate precautions to be followed on the "hot works" permit. This individual shall sign the permit and notify UT Physical Safety that the work is authorized, and shall verify the following:


Adequate ventilation (natural, mechanical, or respirator) must be provided for all welding, cutting, brazing, and related operations. Adequate ventilation depends upon the following factors.

Special Ventilation Concerns

Certain materials, sometimes contained in the consumables, base metals, coatings, or atmospheres of welding or cutting operations, have low or very low permissible exposure limits (American Conference of Governmental Industrial Hygienists, Threshold Limit Value 1.0 mg/m3 or less). Among these materials are:

The material safety data sheets must be on site available to identify any of the materials listed above that may be present.

Whenever these materials are encountered as designated constituents in welding, brazing, or cutting operations, special ventilation precautions shall be taken to assure the level of contaminants in the atmosphere is below permissible exposure limits or recommendations.

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For further information concerning this guide, please contact:
Occupational Safety and Fire Prevention program at 713-500-8100