In stairways serving not more than four stories , doors are permitted to be locked from the side opposite the egress side, provided they are openable from the egress side and capable of being unlocked simultaneously without unlatching upon a signal from the fire command center , if present, or a signal by emergency personnel from a single location inside the main entrance to the building.
Stairway exit doors shall be openable from the egress side and shall only be locked from the opposite side in Group B , F, M and S occupancies where the only interior access to the tenant space is from a single exit stairway where permitted in Section Stairway exit doors shall be openable from the egress side and shall only be locked from the opposite side in Group R-2 occupancies where the only interior access to the dwelling unit is from a single exit stairway where permitted in Section Doors serving a Group H occupancy and doors serving rooms or spaces with an occupant load of 50 or more in a Group A or E occupancy shall not be provided with a latch or lock other than panic hardware or fire exit hardware.
Exceptions: A main exit of a Group A occupancy shall be permitted to be locking in accordance with Section Doors serving a Group A or E occupancy shall be permitted to be electromagnetically locked in accordance with Section Where panic or fire exit hardware is installed, it shall comply with the following: Panic hardware shall be listed in accordance with UL The actuating portion of the releasing device shall extend not less than one-half of the door leaf width. The maximum unlatching force shall not exceed 15 pounds 67 N.
If balanced doors are used and panic hardware is required, the panic hardware shall be the push-pad type and the pad shall not extend more than one-half the width of the door measured from the latch side. Gates serving the means of egress system shall comply with the requirements of this section. Gates used as a component in a means of egress shall conform to the applicable requirements for doors.
Exception: Horizontal sliding or swinging gates exceeding the 4-foot mm maximum leaf width limitation are permitted in fences and walls surrounding a stadium. Panic hardware is not required on gates surrounding stadiums where such gates are under constant immediate supervision while the public is present, and where safe dispersal areas based on 3 square feet 0.
Such required safe dispersal areas shall not be located less than 50 feet 15 mm from the enclosed space. See Section Turnstiles or similar devices that restrict travel to one direction shall not be placed so as to obstruct any required means of egress. Exception: Each turnstile or similar device shall be credited with a capacity based on not more than a person occupant load where all of the following provisions are met: Each device shall turn free in the direction of egress travel when primary power is lost and on the manual release by an employee in the area.
Such devices are not given credit for more than 50 percent of the required egress capacity or width. Each device is not more than 39 inches mm high.
Turnstiles more than 39 inches mm high shall meet the requirements for revolving doors. Where serving an occupant load greater than , each turnstile that is not portable shall have a side-hinged swinging door that conforms to Section Section Stairways. Stairways serving occupied portions of a building shall comply with the requirements of Sections Alternating tread devices shall comply with Section Ships ladders shall comply with Section Ladders shall comply with Section Exception: Within rooms or spaces used for assembly purposes, stepped aisles shall comply with Section The required capacity of stairways shall be determined as specified in Section Exceptions: Stairways serving an occupant load of less than 50 shall have a width of not less than 36 inches mm.
Spiral stairways as provided for in Section Where an incline platform lift or stairway chairlift is installed on stairways serving occupancies in Group R-3 , or within dwelling units in occupancies in Group R-2 , a clear passage width not less than 20 inches mm shall be provided. Where the seat and platform can be folded when not in use , the distance shall be measured from the folded position. Stairways shall have a headroom clearance of not less than 80 inches mm measured vertically from a line connecting the edge of the nosings.
Such headroom shall be continuous above the stairway to the point where the line intersects the landing below, one tread depth beyond the bottom riser.
The minimum clearance shall be maintained the full width of the stairway and landing. Exceptions: Spiral stairways complying with Section The walkline across winder treads shall be concentric to the direction of travel through the turn and located 12 inches mm from the side where the winders are narrower.
The inch mm dimension shall be measured from the widest point of the clear stair width at the walking surface of the winder.
Where winders are adjacent within the flight , the point of the widest clear stair width of the adjacent winders shall be used. Stair treads and risers shall comply with Sections For the purpose of this section, all dimensions are exclusive of carpets, rugs or runners.
Stair riser heights shall be 7 inches mm maximum and 4 inches mm minimum. The riser height shall be measured vertically between the nosings of adjacent treads. Rectangular tread depths shall be 11 inches mm minimum measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread's nosing. Winder treads shall have a minimum tread depth of 11 inches mm between the vertical planes of the foremost projection of adjacent treads at the intersections with the walkline and a minimum tread depth of 10 inches mm within the clear width of the stair.
Exceptions: Spiral stairways in accordance with Section In Group I-3 facilities , stairways providing access to guard towers, observation stations and control rooms, not more than square feet 23 m 2 in area , shall be permitted to have a maximum riser height of 8 inches mm and a minimum tread depth of 9 inches mm.
Winder treads are not permitted in means of egress stairways except within a dwelling unit. Exceptions: Curved stairways in accordance with Section Spiral stairways in accordance with Section Stair treads and risers shall be of uniform size and shape. Exceptions: Stairways connecting stepped aisles to cross aisles or concourses shall be permitted to comply with the dimensional nonuniformity in Section Consistently shaped winders , complying with Section Nonuniform riser dimension complying with Section Where the bottom or top riser adjoins a sloping public way , walkway or driveway having an established grade and serving as a landing, the bottom or top riser is permitted to be reduced along the slope to less than 4 inches mm in height, with the variation in height of the bottom or top riser not to exceed one unit vertical in 12 units horizontal 8-percent slope of stair width.
The nosings or leading edges of treads at such nonuniform height risers shall have a distinctive marking stripe, different from any other nosing marking provided on the stair flight. The distinctive marking stripe shall be visible in descent of the stair and shall have a slip-resistant surface.
Marking stripes shall have a width of not less than 1 inch 25 mm but not more than 2 inches 51 mm. Risers shall be solid and vertical or sloped under the tread above from the underside of the nosing above at an angle not more than 30 degrees 0. Nosing projections of the leading edges shall be of uniform size, including the projections of the nosing 's leading edge of the floor at the top of a flight.
Risers shall be solid. Exceptions: Solid risers are not required for stairways that are not required to comply with Section Solid risers are not required for occupancies in Group I-3 or in Group F , H and S occupancies other than areas accessible to the public. There are no restrictions on the size of the opening in the riser. Solid risers are not required for spiral stairways constructed in accordance with Section There shall be a floor or landing at the top and bottom of each stairway.
The width of landings shall be not less than the width of stairways served. Every landing shall have a minimum width measured perpendicular to the direction of travel equal to the width of the stairway. Where the stairway has a straight run the depth need not exceed 48 inches mm. Doors opening onto a landing shall not reduce the landing to less than one-half the required width. When fully open, the door shall not project more than 7 inches mm into a landing.
Where wheelchair spaces are required on the stairway landing in accordance with Section Exception: Where stairways connect stepped aisles to cross aisles or concourses, stairway landings are not required at the transition between stairways and stepped aisles constructed in accordance with Section Stairways shall be built of materials consistent with the types permitted for the type of construction of the building, except that wood handrails shall be permitted for all types of construction.
The walking surface of treads and landings of a stairway shall not be sloped steeper than one unit vertical in 48 units horizontal 2-percent slope in any direction. Stairway treads and landings shall have a solid surface. Finish floor surfaces shall be securely attached. Elongated openings shall be placed so that the long dimension is perpendicular to the direction of travel. Outdoor stairways and outdoor approaches to stairways shall be designed so that water will not accumulate on walking surfaces.
The walls and soffits within enclosed usable spaces under enclosed and unenclosed stairways shall be protected by 1-hour fire-resistance -rated construction or the fire-resistance rating of the stairway enclosure, whichever is greater. Access to the enclosed space shall not be directly from within the stairway enclosure. There shall not be enclosed usable space under exterior exit stairways unless the space is completely enclosed in 1-hour fire-resistance -rated construction.
The open space under exterior stairways shall not be used for any purpose. A flight of stairs shall not have a vertical rise greater than 12 feet mm between floor levels or landings. Exception: Spiral stairways used as a means of egress from technical production areas.
Curved stairways with winder treads shall have treads and risers in accordance with Section Exception: The radius restriction shall not apply to curved stairways in Group R-3 and within individual dwelling units in Group R Spiral stairways are permitted to be used as a component in the means of egress only within dwelling units or from a space not more than square feet 23 m 2 in area and serving not more than five occupants, or from technical production areas in accordance with Section The minimum stairway clear width at and below the handrail shall be 26 inches mm.
Stairways shall have handrails on each side and shall comply with Section Where glass is used to provide the handrail , the handrail shall comply with Section Exceptions: Stairways within dwelling units and s piral stairways are permitted to have a handrail on one side only. Decks, patios and walkways that have a single change in elevation where the landing depth on each side of the change of elevation is greater than what is required for a landing do not require handrails.
In Group R-3 occupancies, a change in elevation consisting of a single riser at an entrance or egress door does not require handrails. Changes in room elevations of three or fewer risers within dwelling units and sleeping units in Group R - 2 and R-3 do not require handrails. In buildings four or more stories above grade plane , one stairway shall extend to the roof surface unless the roof has a slope steeper than four units vertical in 12 units horizontal percent slope.
Exception: Other than where required by Section Roofs and penthouses containing elevator equipment that must be accessed for maintenance are required to be accessed by a stairway. Where a stairway is provided to a roof, access to the roof shall be provided through a penthouse complying with Section Exception: In buildings without an occupied roof, access to the roof shall be permitted to be a roof hatch or trap door not less than 16 square feet 1.
Guards shall be provided along stairways and landings where required by Section and shall be constructed in accordance with Section Where the roof hatch opening providing the required access is located within 10 feet mm of the roof edge, such roof access or roof edge shall be protected by guards installed in accordance with Section Alternating tread devices are limited to an element of a means of egress in buildings of Groups F, H and S from a mezzanine not more than square feet 23 m 2 in area and that serves not more than five occupants; in buildings of Group I-3 from a guard tower, observation station or control room not more than square feet 23 m 2 in area and for access to unoccupied roofs.
Alternating tread devices used as a means of egress shall not have a rise greater than 20 feet mm between floor levels or landings. Handrails shall be provided on both sides of alternating tread devices and shall comply with Section The tread depth shall be measured horizontally between the vertical planes of the foremost projections of adjacent treads.
The riser height shall be measured vertically between the leading edges of adjacent treads. The riser height and tread depth provided shall result in an angle of ascent from the horizontal of between 50 and 70 degrees 0. The initial tread of the device shall begin at the same elevation as the platform , landing or floor surface. The rise to the next alternating tread surface shall not exceed 8 inches mm. Ships ladders are permitted to be used in Group I-3 as a component of a means of egress to and from control rooms or elevated facility observation stations not more than square feet 23 m 2 with not more than three occupants and for access to unoccupied roofs.
The minimum clear width at and below the handrails shall be 20 inches mm. Handrails shall be provided on both sides of ships ladders. Ships ladders shall have a minimum tread depth of 5 inches mm. Permanent ladders shall not serve as a part of the means of egress from occupied spaces within a building. Permanent ladders shall be permitted to provide access to the following areas : Spaces frequented only by personnel for maintenance, repair or monitoring of equipment.
Nonoccupiable spaces accessed only by catwalks, crawl spaces, freight elevators or very narrow passageways. Raised areas used primarily for purposes of security, life safety or fire safety including, but not limited to, observation galleries, prison guard towers, fire towers or lifeguard stands. Elevated levels in Group U not open to the general public. Nonoccupied roofs that are not required to have stairway access in accordance with Section Ladders shall be constructed in accordance with Section The provisions of this section shall apply to ramps used as a component of a means of egress.
Exceptions: Ramped aisles within assembly rooms or spaces shall comply with the provisions in Section Curb ramps shall comply with ICC A Vehicle ramps in parking garages for pedestrian exit access shall not be required to comply with Sections Ramps used as part of a means of egress shall have a running slope not steeper than one unit vertical in 12 units horizontal 8-percent slope.
The slope of other pedestrian ramps shall not be steeper than one unit vertical in eight units horizontal The slope measured perpendicular to the direction of travel of a ramp shall not be steeper than one unit vertical in 48 units horizontal 2-percent slope. The rise for any ramp run shall be 30 inches mm maximum. The minimum dimensions of means of egress ramps shall comply with Sections The minimum width and required capacity of a means of egress ramp shall be not less than that required for corridors by Section The clear width of a ramp between handrails , if provided, or other permissible projections shall be 36 inches mm minimum.
The minimum headroom in all parts of the means of egress ramp shall be not less than 80 inches mm. Means of egress ramps shall not reduce in width in the direction of egress travel. Projections into the required ramp and landing width are prohibited.
Doors opening onto a landing shall not reduce the clear width to less than 42 inches mm. Ramps shall have landings at the bottom and top of each ramp , points of turning, entrance, exits and at doors.
Landings shall comply with Sections Landings shall have a slope not steeper than one unit vertical in 48 units horizontal 2-percent slope in any direction. Changes in level are not permitted. The landing width shall be not less than the width of the widest ramp run adjoining the landing. The landing length shall be 60 inches mm minimum. Exceptions: In Group R-2 and R-3 individual dwelling and sleeping units that are not required to be Accessible units , Type A units or Type B units in accordance with Section , landings are permitted to be 36 inches mm minimum.
Where the ramp is not a part of an accessible route , the length of the landing shall not be required to be more than 48 inches mm in the direction of travel. Where changes in direction of travel occur at landings provided between ramp runs, the landing shall be 60 inches by 60 inches mm by mm minimum. Exception: In Group R-2 and R-3 individual dwelling or sleeping units that are not required to be Accessible units , Type A units or Type B units in accordance with Section , landings are permitted to be 36 inches by 36 inches mm by mm minimum.
Where doorways are located adjacent to a ramp landing, maneuvering clearances required by ICC A Ramps shall be built of materials consistent with the types permitted for the type of construction of the building, except that wood handrails shall be permitted for all types of construction.
The surface of ramps shall be of slip-resistant materials that are securely attached. Outdoor ramps and outdoor approaches to ramps shall be designed so that water will not accumulate on walking surfaces.
Ramps with a rise greater than 6 inches mm shall have handrails on both sides. Handrails shall comply with Section Guards shall be provided where required by Section and shall be constructed in accordance with Section Edge protection complying with Section Exceptions: Edge protection is not required on ramps that are not required to have handrails , provided they have flared sides that comply with the ICC A Edge protection is not required on the sides of ramp landings serving an adjoining ramp run or stairway.
A curb, rail, wall or barrier shall be provided to serve as edge protection. A curb shall be not less than 4 inches mm in height.
Barriers shall be constructed so that the barrier prevents the passage of a 4-inch-diameter mm sphere, where any portion of the sphere is within 4 inches mm of the floor or ground surface.
The floor or ground surface of the ramp run or landing shall extend 12 inches mm minimum beyond the inside face of a handrail complying with Section Exits and exit access doors shall be marked by an approved exit sign readily visible from any direction of egress travel.
The path of egress travel to exits and within exits shall be marked by readily visible exit signs to clearly indicate the direction of egress travel in cases where the exit or the path of egress travel is not immediately visible to the occupants. Intervening means of egress doors within exits shall be marked by exit signs. Exit sign placement shall be such that no point in an exit access corridor or exit passageway is more than feet 30 mm or the listed viewing distance for the sign, whichever is less, from the nearest visible exit sign.
Exceptions: Exit signs are not required in rooms or areas that require only one exit or exit access. Main exterior exit doors or gates that are obviously and clearly identifiable as exits need not have exit signs where approved by the building official. Exit signs are not required in occupancies in Group U and individual sleeping units or dwelling units in Group R-1 , R-2 or R Exit signs are not required in dayrooms, sleeping rooms or dormitories in occupancies in Group I In occupancies in Groups A-4 and A-5 , exit signs are not required on the seating side of vomitories or openings into seating areas where exit signs are provided in the concourse that are readily apparent from the vomitories.
Egress lighting is provided to identify each vomitory or opening within the seating area in an emergency. Where exit signs are required in Group R-1 occupancies by Section The bottom of the sign shall be not less than 10 inches mm nor more than 12 inches mm above the floor level.
The sign shall be flush mounted to the door or wall. Where mounted on the wall , the edge of the sign shall be within 4 inches mm of the door frame on the latch side. Exit signs shall be internally or externally illuminated. Exception: Tactile signs required by Section Electrically powered, self-luminous and photoluminescent exit signs shall be listed and labeled in accordance with UL and shall be installed in accordance with the manufacturer's instructions and Chapter Exit signs shall be illuminated at all times.
Externally illuminated exit signs shall comply with Sections Signs larger than the minimum established in this section shall have letter widths, strokes and spacing in proportion to their height. The word " EXIT " shall be in high contrast with the background and shall be clearly discernible when the means of exit sign illumination is or is not energized.
If a chevron directional indicator is provided as part of the exit sign, the construction shall be such that the direction of the chevron directional indicator cannot be readily changed. The face of an exit sign illuminated from an external source shall have an intensity of not less than 5 footcandles 54 lux.
To ensure continued illumination for a duration of not less than 90 minutes in case of primary power loss, the sign illumination means shall be connected to an emergency power system provided from storage batteries, unit equipment or an on- site generator. The installation of the emergency power system shall be in accordance with Chapter Exceptions: Approved exit sign illumination means that provide continuous illumination independent of external power sources for a duration of not less than 90 minutes, in case of primary power loss, are not required to be connected to an emergency electrical system.
Group I-2 Condition 2 exit sign illumination shall not be provided by unit equipment battery only. Handrails serving stairways , ramps , stepped aisles and ramped aisles shall be adequate in strength and attachment in accordance with Section Handrails required for stairways by Section Handrails required for ramps by Section Handrails for stepped aisles and ramped aisles required by Section Handrail height, measured above stair tread nosings , or finish surface of ramp slope, shall be uniform, not less than 34 inches mm and not more than 38 inches mm.
Handrail height of alternating tread devices and ships ladders, measured above tread nosings , shall be uniform, not less than 30 inches mm and not more than 34 inches mm. Exceptions: Where handrail fittings or bendings are used to provide continuous transition between flights , the fittings or bendings shall be permitted to exceed the maximum height. In Group R-3 occupancies; within dwelling units in Group R-2 occupancies; and in Group U occupancies that are associated with a Group R-3 occupancy or associated with individual dwelling units in Group R-2 occupancies; where handrail fittings or bendings are used to provide continuous transition between flights , transition at winder treads, transition from handrail to guard , or where used at the start of a flight , the handrail height at the fittings or bendings shall be permitted to exceed the maximum height.
Handrails on top of a guard where permitted along stepped aisles and ramped aisles in accordance with Section Required handrails shall comply with Section Exception: In Group R-3 occupancies; within dwelling units in Group R-2 occupancies; and in Group U occupancies that are accessory to a Group R-3 occupancy or accessory to individual dwelling units in Group R-2 occupancies; handrails shall be Type I in accordance with Section Edges shall have a minimum radius of 0.
Handrail gripping surfaces shall be continuous, without interruption by newel posts or other obstructions. Exceptions: Handrails within dwelling units are permitted to be interrupted by a newel post at a turn or landing. Within a dwelling unit , the use of a volute, turnout, starting easing or starting newel is allowed over the lowest tread. Where handrails are provided along walking surfaces with slopes not steeper than , the bottoms of the handrail gripping surfaces shall be permitted to be obstructed along their entire length where they are integral to crash rails or bumper guards.
Handrails serving stepped aisles or ramped aisles are permitted to be discontinuous in accordance with Section Handrails shall not rotate within their fittings. Handrails shall return to a wall , guard or the walking surface or shall be continuous to the handrail of an adjacent flight of stairs or ramp run.
Where handrails are not continuous between flights , the handrails shall extend horizontally not less than 12 inches mm beyond the top riser and continue to slope for the depth of one tread beyond the bottom riser. At ramps where handrails are not continuous between runs, the handrails shall extend horizontally above the landing 12 inches mm minimum beyond the top and bottom of ramp runs.
The extensions of handrails shall be in the same direction of the flights of stairs at stairways and the ramp runs at ramps. Exceptions: Handrails within a dwelling unit that is not required to be accessible need extend only from the top riser to the bottom riser.
Handrails serving aisles in rooms or spaces used for assembly purposes are permitted to comply with the handrail extensions in accordance with Section Handrails for alternating tread devices and ships ladders are permitted to terminate at a location vertically above the top and bottom risers. Handrails for alternating tread devices are not required to be continuous between flights or to extend beyond the top or bottom risers. A handrail and a wall or other surface adjacent to the handrail shall be free of any sharp or abrasive elements.
On ramps and on ramped aisles that are part of an accessible route , the clear width between handrails shall be 36 inches mm minimum. Projections into the required width shall not be limited above the minimum headroom height required in Section Projections due to intermediate handrails shall not constitute a reduction in the egress width. Where a pair of intermediate handrails are provided within the stairway width without a walking surface between the pair of intermediate handrails and the distance between the pair of intermediate handrails is greater than 6 inches mm , the available egress width shall be reduced by the distance between the closest edges of each such intermediate pair of handrails that is greater than 6 inches mm.
Stairways shall have intermediate handrails located in such a manner that all portions of the stairway minimum width or required capacity are within 30 inches mm of a handrail. On monumental stairs , handrails shall be located along the most direct path of egress travel. Section Guards. Guards shall comply with the provisions of Sections Operable windows with sills located more than 72 inches mm above finished grade or other surface below shall comply with Section Guards shall be located along open-sided walking surfaces, including mezzanines , equipment platforms , aisles , stairs , ramps and landings that are located more than 30 inches mm measured vertically to the floor or grade below at any point within 36 inches mm horizontally to the edge of the open side.
Guards shall be adequate in strength and attachment in accordance with Section Exception: Guards are not required for the following locations: On the loading side of loading docks or piers. On the audience side of stages and raised platforms , including stairs leading up to the stage and raised platforms.
On raised stage and platform floor areas , such as runways, ramps and side stages used for entertainment or presentations. At vertical openings in the performance area of stages and platforms. At elevated walking surfaces appurtenant to stages and platforms for access to and utilization of special lighting or equipment.
Along vehicle service pits not accessible to the public. In assembly seating areas at cross aisles in accordance with Section Where glass is used to provide a guard or as a portion of the guard system, the guard shall comply with Section Where the glazing provided does not meet the strength and attachment requirements of Section Required guards shall be not less than 42 inches mm high, measured vertically as follows: From the adjacent walking surfaces.
On stairways and stepped aisles , from the line connecting the leading edges of the tread nosings. On ramps and ramped aisles , from the ramp surface at the guard. Exceptions: For occupancies in Group R-3 not more than three stories above grade in height and within individual dwelling units in occupancies in Group R-2 not more than three stories above grade in height with separate means of egress , required guards shall be not less than 36 inches mm in height measured vertically above the adjacent walking surfaces or adjacent fixed seating.
For occupancies in Group R-3 , and within individual dwelling units in occupancies in Group R-2 , guards on the open sides of stairs shall have a height not less than 34 inches mm measured vertically from a line connecting the leading edges of the treads.
For occupancies in Group R-3 , and within individual dwelling units in occupancies in Group R-2 , where the top of the guard also serves as a handrail on the open sides of stairs , the top of the guard shall be not less than 34 inches mm and not more than 38 inches mm measured vertically from a line connecting the leading edges of the treads.
The guard height in assembly seating areas shall comply with Section Along alternating tread devices and ships ladders, guards where the top rail also serves as a handrail shall have height not less than 30 inches mm and not more than 34 inches mm , measured vertically from the leading edge of the device tread nosing. Required guards shall not have openings that allow passage of a sphere 4 inches mm in diameter from the walking surface to the required guard height. The triangular openings at the open sides of a stair , formed by the riser, tread and bottom rail shall not allow passage of a sphere 6 inches mm in diameter.
At elevated walking surfaces for access to and use of electrical, mechanical or plumbing systems or equipment, guards shall not have openings that allow passage of a sphere 21 inches mm in diameter. In areas that are not open to the public within occupancies in Group I-3 , F, H or S, and for alternating tread devices and ships ladders, guards shall not have openings that allow passage of a sphere 21 inches mm in diameter. In assembly seating areas , guards required at the end of aisles in accordance with Section From a height of 26 inches mm to 42 inches mm above the adjacent walking surfaces, guards shall not have openings that allow passage of a sphere 8 inches mm in diameter.
Porches and decks that are enclosed with insect screening shall be provided with guards where the walking surface is located more than 30 inches mm above the floor or grade below. Guards shall be provided where various components that require service are located within 10 feet mm of a roof edge or open side of a walking surface and such edge or open side is located more than 30 inches mm above the floor, roof or grade below.
The guard shall extend not less than 30 inches mm beyond each end of such components. The guard shall be constructed so as to prevent the passage of a sphere 21 inches mm in diameter. The devices shall be reevaluated for possible replacement when the entire roof covering is replaced. The devices shall be placed not more than 10 feet mm on center along hip and ridge lines and placed not less than 10 feet mm from the roof edge or open side of the walking surface.
Guards shall be provided where the roof hatch opening is located within 10 feet mm of a roof edge or open side of a walking surface and such edge or open side is located more than 30 inches mm above the floor, roof or grade below.
Windows in Group R-2 and R-3 buildings including dwelling units , where the top of the sill of an operable window opening is located less than 36 inches above the finished floor and more than 72 inches mm above the finished grade or other surface below on the exterior of the building, shall comply with one of the following: Operable windows where the top of the sill of the opening is located more than 75 feet 22 mm above the finished grade or other surface below and that are provided with window fall prevention devices that comply with ASTM F Operable windows where the openings will not allow a 4-inch-diameter mm sphere to pass through the opening when the window is in its largest opened position.
Operable windows where the openings are provided with window fall prevention devices that comply with ASTM F Operable windows that are provided with window opening control devices that comply with Section The window opening control device, after operation to release the control device allowing the window to fully open, shall not reduce the minimum net clear opening area of the window unit to less than the area required by Section The exit access shall comply with the applicable provisions of Sections through Exit access arrangement shall comply with Sections through Egress through intervening spaces shall comply with this section.
Exit access through an enclosed elevator lobby is permitted. If there is only one emergency exit on your site, it must be fire-resistant. If you want to get up to speed on fire ratings, read our guide to fire ratings before you place your order. A fire escape route is a path that leads to a point of safety, such as a fire exit or protected stairwell. Everyone on your premises should be able to follow this route without the aid of the fire and rescue service, and it must follow the shortest distance possible.
The fire exit regulations recommend that there are at least two escape routes from every part of premises that are completely independent of each other. Every door on an escape route should open in the direction of escape and be easy to open without the use of a key. All exit routes must be permanent parts of the building. The exit portion of a route is separated from other areas of the building. It provides a protected pathway out of the building.
OSHA standards require that exit routes be maintained and kept safe. The following are the OSHA requirements for exit route safety:. DuraLabel custom label printers and tough-tested supplies are the answer to exit route labeling and signs. For example, signs made from DuraLabel phosphorescent supplies can be seen during a power failure or other emergency. Other emergency signs, such as those that mark fire extinguishers, are made with DuraLabel vinyl , the only brand of vinyl that provides a warranty on signs even after they've been put in place.
Find out more about DuraLabel products by calling Graphic Products at Emergency Preparedness. See how to apply a Risk Assessment process to potential emergencies and effectively prepare your facility.
Fire Safety Checklist.
0コメント