4. APTA SS-PS-004-99, Rev. 1 Standard for Low-Location Exit Path ...

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APTA SS-PS-004-99, Rev. 1 Edited 4-1-04 a) Shall be visible and provide emergency evacuation guidance for passengers under all operating conditions for a period of 1.5 hours after all normal and emergency lighting has ceased operation; b) Shall provide an easily distinguishable path along the floor from all aisle seating and compartment locations in the rail car to all of the car’s primary exits; c) Shall include exit signs at each primary exit visible from a low-location (as defined in 3.1.10) and from a horizontal distance of 6 feet (1.93 m) from the exit along the exit path; d) Shall provide readily distinguishable markings along the perimeter of the door or door frame visible from a low-location (as defined in 3.1.10) and from a horizontal distance of 6 feet (1.93 m) from the exit along the exit path; e) Shall provide readily distinguishable markings on or around the door’s operating handle. Providing the above conditions are met, the LLEPM system may consist of either passive (HPPL) marking materials, active (electrical) marking fixtures, or a combination of these two systems. 5. System design requirements The LLEPM shall identify an easy-to-follow exit path from all aisle and compartment seating positions to the primary exits through the cars center aisle, side aisle, passageway, and stairs. The LLEPM system shall consist of either passive (HPPL) marking materials, active (electrical) marking fixtures, or a combination of these two systems. 5.1 Passive marking method (HPPL) When using HPPL marking materials as exit path marking material in rail cars, an ambient light source must be available, (either natural and/or artificial), to provide a sufficient charge to the HPPL system prior to the loss of the main lighting power and emergency power systems. Annexes B and D provide the lab and field tests necessary to demonstrate that the LLEPM meets the criteria for light output of 7.5 mcd/m 2 after 1.5 hours. HPPL marking material may be applied on the floor or upon seat pedestals/components at a height of not more than 18 inches (45.7 cm) from the floor on both sides, (unless applied as a continuous strip on the floor, in which case, the LLEPM material need only be applied to one side or down the middle of the aisle/passageway). The marking material shall be oriented to insure that it is easily visible to passengers and crewmembers negotiating the aisle/passageway and adequately exposed to the charging light fixtures and/or natural light source. The width of each marking strip shall not be less than 1 inch (2.54 cm) and may be applied either as a continuous or intermittent strip with no uncovered interval exceeding 4.9 Volume VI - Passenger System
APTA SS-PS-004-99, Rev. 1 Edited 4-1-04 36 inches (91 cm) in length. The marking material must be positioned to be readily recognized as a continuous path from any seat or compartment in the car to all of the primary exits. The spacing between the corner of a change in direction of the exit path and the marking material shall not exceed 4 inches (10 cm). EXCEPTION--The maximum spacing of the marking materials may exceed 36 inches (91 cm) if the marking system is determined to provide equivalent visual delineation of the exit path. In all stairways HPPL marking material shall be applied either as a continuous strip applied on the partitions of both sides of the stairs or as intermittent strips applied to the treads and risers of each step. When the HPPL marking material is applied to the stairway partitions the marking shall be applied as a continuous strip extending from the lowest to the highest step. Each strip shall be a minimum of 1 inch (2.54 cm) wide and be located no higher on the partition than 18 inches (45.7 cm) above the stair nosing. When the HPPL marking material is applied to the stairway treads and risers a 1 inch (2.54 cm) wide strip of material shall extend across the full width of each tread and riser near the step nosing. 5.2 Active marking methods 5.2.1 Strip marking materials In lieu of, or in addition to, HPPL materials, incandescent electroluminescent (EL), and LED marking material/fixtures may be employed as LLEPM material. The luminance value of the incandescent, EL, or LED marking material/fixtures as measured at the active areas shall be not less than 1000 mcd/m 2 . The incandescent, EL, or LED marking system shall be independent of the car’s normal and emergency lighting systems and be operational for a period of 1.5 hours after all normal and emergency lighting has ceased operating. Incandescent, EL, or LED marking material/fixtures may be applied on the floor or upon seat pedestals/components at a height that is no more than 18 inches (45.7 cm) from the floor on at least one side of the aisle/passageway. The marking material shall be oriented to insure that it is easily visible to passengers and crewmembers negotiating the aisle/passageway. The marking material/fixtures may be applied either as a continuous or intermittent strip with no uncovered interval exceeding 36 inches (91 cm) in length. The marking material/fixtures must be positioned so as to be readily recognizable as a continuous path from any seat or compartment in the car to all of the primary exits. The spacing between the corner of a change in direction of the exit path and the marking material/fixture shall not exceed 4 inches (10 cm). 4.10 Volume VI - Passenger System
Page 1 and 2: APTA SS-PS-004-99, Rev. 1 Edited 4-
Page 5 and 6: Contents 4.4 APTA SS-PS-004-99, Rev
Page 7 and 8: 2. References 4.6 APTA SS-PS-004-99
Page 9: APTA SS-PS-004-99, Rev. 1 Edited 4-
Page 13 and 14: 5.3 LLEPM exit door markings 4.12 A
Page 15 and 16: Annex A (informative) Bibliography
Page 17 and 18: Annex B (informative) Passive LLEPM
Page 19 and 20: C.2 Underwriters’ Laboratories (U
Page 21 and 22: D.2 Verification of compliance opti

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