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GENERAL
Risers shall consist of three, 18" deep steps with tapered ends, 8", 16"
and 24" high that are permanently joined with hinged mechanisms to
enable the unit to open and fold in a unitized manner. A fourth level,
32" high, add-on step may be added if desired. Each unit shall be
equipped with integral wheels to facilitate transportation when folded
and to allow easy positioning after the unit has been set up for use.
FRAME
Risers shall be supported by tubular steel frames of 1" x 1" - 16 gauge,
zinc-plated steel. Individual frame sections shall be joined with
11-gauge, knuckle type hinges, secured with five, 5/16" bolts and
locking nuts.
DECK
Riser decks are to be constructed of 3/4" thick plywood, surfaced with
polyolefin carpet. Decks are encased and supported by 1 13/16" high,
channels of 16-gauge, powder-coated steel.
HANDS-FREE GAS-SPRING ASSIST
Each unit shall be equipped with a gas-spring cylinder that provides
sufficient lifting force to allow an adult of average size and weight to
set up the unit by applying moderate foot pressure to the unit.
AUTOMATIC SAFETY LOCK
Each unit shall be equipped with a spring actuated locking device that
automatically engages upon opening to prevent the unit from folding
while in use. As an added safety measure, a horizontal force of
approximately 48 lbs. shall be required, while simultaneously operating
the lock release, to begin folding the unit.
DROP-IN COUPLING
Units are to be furnished with zinc plated, drop-in couplings, formed of
3/8" diameter round bar. Couplings shall provide a suitable handle for
lifting and transporting the folded unit.
OPTIONAL BACKRAILS
Backrails shall be constructed of powder coated tubular steel and shall
be equipped with integral clamp-on attachments for fast installation
without tools.
WARRANTY
All stage components shall be free of defects in materials and
workmanship for a period of five years. Any defects discovered and
reported in writing within the warranty period shall be corrected by the
manufacturer at no cost to the owner.
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