California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 6 - Elevator Safety Orders › Group III - Installations Defined by Section 3000(f) of these Orders. Elevator Installations for Which the Installation Contract Was Signed on or After October 25, 1998, but Before May 1, 2008 › Article 37 - Seismic Requirements › Section 3137 - Seismic Requirements for Elevators, Escalators and Moving Walks

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Elevators shall comply with the seismic requirements
						  for elevators in Part XXIV of ASME A17.1-1996, except for Rule 2409.1b(1),
						  which is hereby incorporated by reference.
(a) Earthquake protective devices shall be
						designed, arranged, and maintained to ensure that if any component fails, the
						elevator will go into the earthquake-sensed mode and be removed from service in
						the same manner as though an earthquake were occurring, and that the elevator
						will so remain until the faulty component has been repaired and the system is
						again arranged to work as intended.
(b) For hospital buildings, the earthquake
						sensing device shall activate upon excitation in a horizontal or vertical
						direction of not more than 0.5 g.
(c) Earthquake protection devices shall be
						arranged to be checked once a year for satisfactory operation and shall be
						calibrated at intervals recommended by the manufacturer.
(d) The following requirements apply to
						escalators and moving walks and are in addition to the requirements contained
						in other parts of this code:
(1) Connections
						which join the escalator or moving walk to the building shall be designed for
						seismic loads of 0.5g in both principal horizontal directions.
(2) The design connections shall provide for
						maximum design story drift.
(A) Seismic
						restraint shall be provided. Where seismic restraint is provided at one end,
						the design shall account for torsion. All other supports shall be free to slide
						in the longitudinal direction. Where seismic restraint is provided at both ends
						which allows some degree of longitudinal and transverse motion, additional
						means shall be provided to prevent the upper ends of the truss from slipping
						off the building support. All other supports shall be free to slide
						sufficiently in the longitudinal direction to accommodate the remainder of the
						design story drift.
(B) At the
						sliding end or ends, the width or widths of the beam seat shall be capable of
						accommodating, without damage, at least two times the current code allowable
						story drift (see Title 24, Chapter 16A, Section
						1628 A.8) in both tensile and
						compressive modes.
(C) Seismic
						restraint shall be provided in the transverse direction at all supports.
						Intermediate supports, if any, shall be free to move laterally in all
						directions. The gap between the escalator truss and the seismic restraint shall
						not exceed ¼ inch on each side.
(3) The handrail supports shall be designed
						to resist a lateral load of 50 lb/ft applied at the top of the handrail. In
						balustrades which contain glass, the glass shall not be part of the structural
						support system of the handrail unless documentation can be presented, to the
						Division, to verify the glass used in support can withstand the stresses
						occurring during an earthquake.
(4)
						A minimum of one seismic switch shall be provided in every building in which an
						escalator or moving walk is installed.
(A) The
						seismic switch shall activate according to manufacturer specifications at a
						level and direction established by the escalator/moving walk manufacturer and a
						California registered professional engineer.
(B) Activation of the seismic switch shall
						remove power from the escalator or moving walk and apply the brake.
(C) Where a seismic switch is used
						exclusively to control the escalator or moving walk, it shall be located in an
						escalator or moving walk machine room and where possible shall be mounted
						adjacent to a vertical load-bearing structural
						member.