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W. Charles Perry & Associates
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When OSHA changed window washing & unscheduled maintenance regulations for buildings taller thank 75 feet, CB Richhard Ellis needed to upgrade their roof-mounted building maintenance equipment. We designed a swingstage installation. When bids for the new system were too expensive, we requested a variance from OSHA, received it, and changed the design to a Controlled Descent Apparatus system.

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520 S. El Camino Real, Suite 422, San Mateo, CA 94402-1726, voice 650-685-8290, FAX 650-685-8354 info@wcharlesperry.com