NATIONAL ACADEM SCIENCE; KIM MITCHELL

2101 Constitution Ave Nw, Washington, Dc 20418
Revision of permit no b0904819 to include five elevator and three chairlifts - elevator 1 with completely new hydraulic elevator in an existing shaft and new cab and all new doors at al levels elevator 2 replacement of complete operational and control systems installation of new pumping unit and hydraulic control valve provide new hydraulic control valve installation of new hydraulic cylinder assembly and pvc liner replace door operator and related equipment replace car door hangers, guides, cables, tracks, headers and contacts replace hoistway door hangers, tracks and door guides replace interlocks and closers replace door reopening and obstruction devices install new car roller guides replace hoistway wiring, conduit, junction boxes, limit switches and traveling cables replace pit stop switch renew cab finish as specified provide new car and hall signal fixtures provide handicap features to comply with code provide fire service features to comply with code construction of and machine