PDFWAC 296-96-05040
Space below hoistway.
If the space directly below the hoistway is accessible, the following requirements apply:
(1) All lift counterweights shall have safeties.
(2) All cars and counterweights shall have either spring or oil buffers.
(3) Spring buffers shall not fully compress when struck by a car carrying its rated load or by the counterweights when they are moving at the following speeds:
(a) For safeties operated by a governor, the tripping speed of the governor is the maximum striking speed.
(b) For safeties not operated by a governor, 125 percent of the rated speed is the maximum striking speed.
(4) Car and counterweight-buffer supports shall be able to withstand any impact upon the buffer (without permanent deformation) while occurring at the following speeds:
(a) For safeties operated by a governor, the tripping speed of the governor at the rated capacity is the maximum impact speed.
(b) For safeties not operated by a governor, 125 percent of the rated speed is the maximum impact speed.