10' -0 UPPER 01 36' -0 ------------- GUIDERAI~ -----------I COUPLING SLOTS UPRIGHT COUPLING ROLLER GUI DES o =~~lL~ff rr!-~~~~==~~ffi~~=~O~~ I",bJ=, PLUNGER ~ 0 o I pIT LEVEL ~[[r='i:;;1:~~~~~J~~~!~~~~~7'=~1b EQUALIZER RO PES : iA:L GUIDE & LOCKING BARS ·t J 81- 0 lCONCRETE I I I .' EQUALIZER STRUT I~ I ,~ L CYLINDER~ 44' -8 IREF) CASING ! I u· Jl -Ju~ -~ ---- J J) R/(/e,(/9 5-8-75 Each double-deck stage lift cail carry its 80,000 pounds of live load distributed between upper and lower decks in any proportion. 12 SPRING,1976 THEATRE DESIGN AND TECHNOLOGY I USITT I