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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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Address: 231 W. 41st Avenue, San Mateo, CA 94403     Office Phone: 650-638-9546     E-mail: charles@wcharlesperry.com