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