GSA Courthuse Management Group
Mechanical Lift Analysis
MECHANICAL LIFT SYSTEMS COMPARISON
(INVESTIGATION BY HDR & LERCH / BATES)
EVALUATION CRITERIA:
MEETS BASIC REQUIREMENTS >
STANDARD PRODUCTION SYSTEM:
SCISSORS
CANTILEVERED CANTILEVERED CANTILEVERED CANTILEVERED PORTABLE
CANTILEVERED CANTILEVERED CANTILEVERED TUBULAR
PLATFORM
PLATFORM W/
PLATFORM W/
PLATFORM W/
PLATFORM W/
PLATFORM W/
PLATFORM W/
PLATFORM W/
THRUST
TOWER
TOWER
TOWER
TOWER
TOWER
TOWER
TOWER
SCREW
OPERATION
OPERATION
OPERATION
OPERATION
OPERATION
OPERATION
OPERATION
OPERATION
INCLINED
INCLINED
DRIVE PLACED
PLATFORMS
PLATFORMS
UNDER OR
ALONG SIDE
PORTABLE
PLATFORM
WILL THEY PROVIDE THEIR BASIC
YES
YES
NO
YES
YES
NO
YES
YES
YES
YES
OPERATIONAL PLATFORM & DRIVE
MECHANISM COORDINATED
WITH A CUSTOM ENCLOSURE?
TYPE OF DRIVE MECHANISM:
HYDRAULIC
ACME SCREW
HYDRAULIC
RECIRC.
ACME SCREW
HYDRAULIC
CABLE
SCREW DRIVE
HYDRAULIC
ELECTRIC
CHAIN
BALL SCREW
HYDRAULIC
CHAIN
WORM SCREW
HYDRAULIC
OPTION
ROPE
HYDRAULIC
OPTION
IS THERE LEVELING
YES
1/2" IN FIELD
YES
CAN BE MADE
CAN BE MADE
YES
YES
YES - LIMIT
YES - LIMIT
YES - LIMIT
ADJUSTMENT CAPABILITY?
WITHIN 3/8"
WITHIN 3/8"
SWITCH
SWITCH
SWITCH
(WITHIN FRACTIONS OF AN INCH.)
ADJUSTMENTS
ADJUSTMENTS
ADJUSTMENTS
HAVE THEY EVER PROVIDED
YES
YES
YES
YES
YES
1 YES
YES
YES
NO
WITNESS BOX
& JUDGE'S BENCH LIFT?
HOW MANY INSTALLATIONS?
>200
>6
>5
>10
>200
1 >10
>10
>10
0
(21 U.S. CTS)
(10 U.S. CTS.)
ARE THEY DOING ANY PRODUCT
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
REFINEMENTS / RESEARCH
APPLICABLE TO THEIR
LIFT DESIGN?
DO THEY PROVIDE A MODEL
YES
YES
NO
YES
YES
N/A
YES
NO
YES
YES
REQUIRING A PIT?
DO THEY PROVIDE A MODEL
YES
YES
YES
YES
YES
N/A
YES
YES
YES ( 3 1/4"
NO
WITHOUT A PIT REQUIREMENT?
RAMP RQD.)
IS A PORTABLE UNIT AVAILABLE?
NO
NO
NO
YES
YES
YES
YES
NO
NO
YES
(DOES NOT
(WILL MEET
MEET ADA)
ADA)
WILL THEY BID ON LIFTS
YES
YES
YES
YES
YES
NO
YES
YES
YES
YES
FOR COURTROOMS?
UNIFORMITY / CONSISTENCY
5
5
5 N/A
2 N/A
OF PRODUCT
(RANGE 1- 5) LOW - HIGH
GENERAL INFORMATION
NOTE: NOT ALL MANUFACTURERS LISTED CAN
PROVIDE LIFTS FOR A FREESTANDING
WITNESS BOX OR JURY BOX DUE TO
INFLEXIBILITY OF TOWER / MAST HEIGHT.
CONTACTS
HDR Architecture, Inc.
Section 8
Previous Page
