GSA Courthouse Management Group
Mechanical Lift Analysis Supplement
U.S. GENERAL SERVICES ADMINISTRATION
COURTHOUSE MANAGEMENT GROUP
MECHANICAL LIFT ANALYSIS SUPPLEMENT
PART 1 ASSESSMENT OF THE SPIRALIFT SYSTEM
PURPOSE OF THE SUPPLEMENT
The Spiralift design concept was identified by GSA as a possible unique design solution and
an alternative to the hydraulic/scissors and cantilevered platform concepts already described
in the Mechanical Lift Analysis.
GALA THEATRICAL EQUIPMENT
ST. HUBERT, QUEBEC, CANADA
DESCRIPTION OF THE SYSTEM AND ITS CURRENT USES
The Spiralift system was originally designed to provide an efficient means of raising and
lowering elements within theatrical and/or music performance halls and auditoriums. These
elements include the stage, orchestra platforms, and seating row levels. The custom designed
lift systems consist of one or more standard Spiralift units connected by horizontal framing
members to provide a smooth, level, and stable change in elevation. The Spiralift systems are
currently manufactured in three sizes designated by diameter dimension including the 6 in., 9
in., and 18 in. models.
The manufacturer, Paco Corporation, has successfully tested the largest units for a 40 ft
vertical travel distance sustaining a load of 40,000 lbs without any problems.
They have incorporated the 6 in. Spiralift elements into many custom design conditions,
including placement on a frame with wheels to provide a portable unit.
The 6 in. unit with a capacity of 3,500 lbs is the one most feasible for adaptation to the
courtroom witness box and Judge's bench accessibility requirements.
HDR Architecture, Inc.