Public Safety

Public Safety

Cutting & Welding

Hot Work, Welding, or Cutting Regulations



The University of Cincinnati must protect against fire created by construction or open flame work i.e., welding, and follow the State of Ohio Fire Code 1301:-7-22, Chapter 22: Welding or Cutting, Calcium Carbide and Acetylene Generators (Appendix A) and that OSHA further enforces this regulation under 29 CFR 1926.353.


All Supervisors and Project Managers of projects which will include hot work etc. shall be trained and knowledgeable in 29 CFR 1910.119 (2) Employer Responsibilities I, II, III, IV, V, and VI.

The Department of Public Safety, Fire Prevention Unit is to be notified whenever any cutting or welding is to be performed outside of an established shop.  An Inspector will inspect the work site before starting the operation to determine that:

All necessary precautions are taken.

A properly instructed fire watch equipped with fire extinguishers of the proper type is provided.

The proposed operation does not constitute a hazard to life and property. 

If the operation is deemed safe, a written permit, signed by the unit supervisor, will be given to the operator and/or supervisor, if any.  A copy of such "HOT WORK PERMIT" (Appendix B) will be kept on file by Fire Prevention.  a working copy shall be kept in the project file as defined by OSHA.

All welding, cutting, or burning operations will be under the supervision and control of a competent supervisor, i.e., contractor, or Operations & Maintenance, or Facilities Management personnel who will ensure compliance with regulations pertaining to such operations and who has the commensurate authority and expertise.

Each separate operation and work site will require an inspection and issuance of a permit.  No person at any time will conduct any cutting or welding operation outside an established, properly authorized shop without a "HOT WORK PERMIT".  Existing buildings, which have been released to a contractor, are included where permit requirements are concerned.

A permit for welding or cutting operations shall not be issued unless the individuals in charge of performing such operations are capable of doing such work in a safe manner.

Companies, corporations, co-partnership and owner-operators required to have a permit shall maintain a record of all locations where welding or cutting operations are performed and have it available for inspection upon request.

In the performance of welding or cutting operations only equipment approved by the Unit Supervisor

Sprinkler protection shall not be shut off while welding or cutting work is being performed.  When welding or cutting is done close to automatic sprinkler heads, damp cloth guards may be used to shield the individual heads, but shall be removed when the work is complete.

Fuel gas cylinders stored inside of building, except those in actual use or attached ready for use, shall be limited to a total capacity of 2,000 cubic feet of gas or 300 pounds of liquefied petroleum gas.  Storage exceeding 2,000 cubic feet total gas capacity of cylinders or 300 pounds liquefied petroleum gas shall be in a separate room, outside, or in a separate building.  Cylinders permitted inside of buildings shall be stored at least 20 feet from highly combustible materials and where they will not be exposed to excessive rise in temperature, physical damage or tampering by unauthorized persons.

Whenever an operator using electric welding equipment has occasion to leave their work or stop work for an appreciable time, they will open the power supply switch to the equipment and disconnect the equipment from the source of power.

The acetylene and oxygen valves shall be closed at the cylinder whenever the equipment is left unattended, or when work is stopped for more that fifteen (15) minutes.

A FIRE WATCH will be provided by individuals performing hot work during and for sixty (60) minutes after work, including any coffee or lunch breaks.

When welding or cutting is to be performed in any confined space other than in an authorized welding shop, the gas cylinders must be left outside unless specifically approved by Fire Prevention.

Oxygen and fuel gas systems shall be inspected frequently by individuals performing work for evidence of leaks in hoses, couplings, valve stems, fittings, and other points in the system.

Oxygen cylinders shall be kept away from oil and grease at all times.  A high-pressure leak from an oxygen cylinder may cause sufficiently rapid oxidation to ignite gasoline, oil, grease, alcohol, or organic material, and may result in a fire or explosion.

Welders shall handle oxygen, acetylene, and other fuel gases carefully and secure cylinders by lashing, strapping, chaining, or clamping in an upright position.

Fire Prevention shall provide oversight and quality control training.  Facilities Management and Operations & Maintenance personnel shall be trained in elements and implementation of the standard.

Construction Management project teams shall ensure that all contractors providing services shall have a documented program in place prior to the start of work.