Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › General Industry Safety Standards › Part 6 - FIRE EXITS › GENERAL PROVISIONS › Section R. 408.10604 - Definitions; H to M

Current through Vol. 24-12, July 15, 2024
Rule 604.
(1)
						"Hasp and staple" means a fastening device that consists of a slotted hinge
						plate and a loop (staple).
(2)
						"Hazardous area" means an area of a building, or portion thereof, used for
						purposes that involve highly combustible, highly flammable, or explosive
						products or materials which are likely to burn with extreme rapidity or which
						may produce poisonous fumes or gases, including highly toxic or noxious acids,
						alkalines, or irritant hazards; which cause the division of material into fine
						particles or dust subject to explosion or spontaneous combustion; or which
						constitute a high fire hazard because of the form, character, or volume of the
						material used.
(3) "Hazard of
						contents" means the relative danger of the start and spread of fire, the danger
						of smoke or gases generated, and the danger of explosion or other occurrence
						potentially endangering the lives and safety of employees in a building. Where
						certain features of a building are such as to involve a hazard greater than the
						hazard of the contents, the greater degree of hazard shall govern.
(4) "High hazard area" means an area inside a
						workplace in which operations include high hazard materials, processes, or
						contents.
(5) "High hazard
						contents" means combustibles of a character or quantity that burn with extreme
						rapidity or from which extremely poisonous fumes or explosions are to be
						expected in the case of fire.
(6)
						"Horizontal exit" means a way of passage from a building to an area of refuge
						in another building on approximately the same level or a way of passage through
						or around a fire-resistant wall or fire-resistant partition to an area of
						refuge on approximately the same level in the same building which affords
						safety from fire or smoke in the area of escape and areas communicating
						therewith.
(7) "Listed" means
						equipment that is listed if it is of a kind mentioned in a list that is
						published by a nationally recognized testing laboratory that makes periodic
						inspections of the production of such equipment and that states that such
						equipment meets nationally recognized standards or has been tested and found
						safe for use in a specified manner.
(8) "Low hazard contents" means combustibles
						of such low combustibility that self-propagating fire cannot occur and that
						consequently the only probable danger will be from panic, fumes, smoke, or fire
						from some external source.
(9)
						"Means of egress" also known as an "exit route" means a continuous and
						unobstructed path of exit travel from any point within a workplace to a place
						of safety, including refuge areas. A means of egress includes both vertical and
						horizontal areas along the route of travel. A means of egress or an exit route
						consists of 3 separate parts and are defined as follows:
(a) "Exit access" means that portion of a
						means of egress or an exit route which leads to an exit. An example of an exit
						access is a corridor on the 5th floor of an office building that leads to a
						2-hour fire resistance-rated enclosed stairway.
(b) "Exit" means that portion of a means of
						egress or an exit route that is separated from the area of a building from
						which escape is to be made by a wall, floor, door, or other means which
						provides the protected path necessary to proceed with reasonable safety to the
						exterior of the building. An example of an exit is a 2-hour fire
						resistance-rated enclosed stairway that leads from the 5th floor of an office
						building to the outside of the building.
(c) "Exit discharge" means that portion of an
						exit route that leads directly outside or to a street, walkway, refuge area,
						public way, or open space with access to the outside. An example of an exit
						discharge is a door at the bottom of a 2-hour fire resistance-rated enclosed
						stairway that discharges to a place of safety outside the building.