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Temporary heating devices.
(a) Fresh air shall be supplied in sufficient quantities to maintain the health and safety of workers. Where natural means of fresh air supply is inadequate, mechanical ventilation shall be provided.
(b) When heaters are used in confined spaces, special care shall be taken to provide sufficient ventilation in order to ensure proper combustion, maintain the health and safety of workers, and limit temperature rise in the area.
(2) Clearance and mounting.
(a) Temporary heating devices shall be installed to provide clearance to combustible material not less than the amount shown in Table D-4.
(b) Temporary heating devices, which are listed for installation with lesser clearances than specified in Table D-4, may be installed in accordance with their approval.
(c) Heaters not suitable for use on wood floors shall not be set directly upon them or other combustible materials. When such heaters are used, they shall rest on suitable heat insulating material or at least 1-inch concrete, or equivalent. The insulating material shall extend beyond the heater 2 feet or more in all directions.
(d) Heaters used in the vicinity of combustible tarpaulins, canvas, or similar coverings shall be located at least 10 feet from the coverings. The coverings shall be securely fastened to prevent ignition or upsetting of the heater due to wind action on the covering or other material.
(3) Stability. Heaters, when in use, shall be set horizontally level, unless otherwise permitted by the manufacturer's markings.
(4) Oil-fired heaters.
(a) Flammable liquid-fired heaters shall be equipped with a primary safety control to stop the flow of fuel in the event of flame failure. Barometric or gravity oil feed shall not be considered a primary safety control.
(b) Heaters designed for barometric or gravity oil feed shall be used only with the integral tanks.
(c) Heaters specifically designed and approved for use with separate supply tanks may be directly connected for gravity feed, or an automatic pump, from a supply tank.
(a) Coverage. The use of solid fuel salamanders is prohibited in buildings and on scaffolds.
(b) General requirements.
(i) All solid fuel salamanders shall be designed and constructed for use with solid fuel, that is, coal or coke.
(ii) Solid fuel salamanders shall be equipped with a cover designed as part of the unit, to prevent spillage of burning material in case of tipover.
(iii) Salamanders shall be assembled in accordance with the instructions issued by the manufacturer.
(iv) The safeguards engineered into the product shall be maintained and any replacement shall be equivalent thereto.
(v) Salamanders shall be stored in such a manner as to prevent deterioration or damage to the unit.
(i) Manufacturers' instructions shall be followed by the user.
(ii) Each time a salamander is placed in operation it shall be checked to insure that it is functioning properly. Its operation shall be checked periodically thereafter.
(iii) When concentrations of carbon monoxide attain quantities greater than 35 parts per million (0.0035 percent) to air volume at employee breathing levels, the salamander shall be extinguished unless additional natural or mechanical ventilation is provided to reduce the carbon monoxide content to permissible limits.
(iv) Tests for presence of carbon monoxide shall be made by a qualified person within 1 hour after the start of each shift and at least every 3 hours thereafter. If concentrations of carbon monoxide reach 20 parts per million to air volume, tests shall be made more frequently to determine if there is a continuing increase of carbon monoxide concentration.
(v) Records of all tests including the date, time, results obtained, and person making tests, shall be maintained for the duration of the project.
(vi) No persons shall be permitted to be within the area being heated by the salamanders except under the following circumstances: When tending the salamanders; when testing the atmosphere; or in emergency situations.
(vii) No employee shall be permitted to enter the heated area until notification is given to another person located outside. Periodic checks shall be made to ensure the health and safety of employees entering the heated area.
(viii) When a salamander is being used, the responsibility for its operation and maintenance shall be assigned to a qualified employee.
(ix) Salamanders shall not be moved, handled, or serviced while hot or burning, or while component parts are hot to the touch.
(x) Salamanders, when in use, shall be set level with the horizontal unless otherwise permitted by the manufacturer's markings. Salamanders shall be designed so as not to tip over when placed on a surface inclined 25° to the horizontal.
(xi) If equivalent protection and safety is afforded by alternative design, the 25° limitation may be reduced.
(xii) Salamanders not suitable for use on wood floors shall not be set directly upon them or other combustible materials. When such salamanders are used they shall rest on suitable insulating material or at least 1-inch concrete or equivalent. The insulating material shall extend beyond the salamander 2 feet or more in all directions.
(xiii) Salamanders used in the vicinity of tarpaulins, canvas, or similar coverings shall be located a safe distance from coverings and other combustible materials. The coverings shall be securely fastened to prevent ignition of the covering or upsetting of the salamanders due to wind action on the covering or other material.
(xiv) Salamanders in use shall be protected to prevent flame extinguishment.
(i) Fresh air shall be supplied in sufficient quantities to maintain the health and safety of employees. Where natural means for fresh air supply is inadequate, mechanical ventilation shall be provided. Particular attention shall be given to confined spaces and pockets where heat and fumes may accumulate and employees may be present (roof areas, peaks, basement).
(ii) When salamanders are used in confined spaces, special care shall be taken to provide sufficient ventilation in order to assure proper combustion, maintain the health and safety of employees, and limit temperature rise in the area.
(i) Salamanders shall be refueled only by a person trained in such operations.
(ii) Only a one day's supply of heater fuel shall be stored inside a building in the vicinity of the salamander. General fuel storage shall be outside the structure.
(iii) All fuel storage shall be maintained a minimum of 25 feet from source of ignition.
(i) The user shall comply with the maintenance instructions as provided by the manufacturer.
(ii) Equipment showing evidence of deterioration or damage that constitutes a safety or health hazard shall be removed from service.
(iii) Salamander repairs shall be performed in accordance with the manufacturer's recommendations, and replacement parts shall be equal to, the equivalent of, or the same as the original salamander equipment.
[Statutory Authority: Chapter 49.17
RCW. WSR 94-15-096 (Order 94-07), § 296-155-280, filed 7/20/94, effective 9/20/94; Order 76-29, § 296-155-280, filed 9/30/76; Order 74-26, § 296-155-280, filed 5/7/74, effective 6/6/74.]