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CAPACITY
All units must be designed to carry a uniform live load of at least 200
lbs. per square foot. Written laboratory test data must be submitted on
request.
PORTABILITY
The riser system shall be capable of being completely set-up and
dismantled quickly, without special tools, by two persons of average
physical strength.
CONSTRUCTION
DECKING
A solid, plywood core shall be surfaced with one of the following:
OPTION 1: 1/8" thick tempered hardboard - OPTION 2: polypropylene sheet
- OPTION 3: carpet. The decking shall measure at least " in thickness.
The perimeter of the decking shall be routed to allow the frame to fit
flush with the top surface and cover the edges of carpeting.
FRAME
A 16 gauge, formed steel channel, 1-13/16" high shall be reinforced with
a 16 gauge steel angle welded to the inside of the channel. The angle
shall provide a continuous support to which the decking is secured with
screws placed a maximum of 9" apart. The frames shall completely enclose
the top, bottom and edges of the decking perimeter preventing the
decking and any specified covering from becoming loose or damaged. All
areas where frame members are joined together shall be reinforced with
steel plates attached with rivets.
LEG STRUCTURE
Each leg assembly shall be constructed of 1.05" diameter, 14 gauge steel
tubing capped at the point of floor contact with high impact plastic
glides. The vertical load bearing members shall be joined at the top by
a full width, steel tube to provide maximum support to the stage deck.
The top of each leg assembly shall fold open and closed, rotating within
16 gauge steel saddle clips that are secured with at least four screws.
Leg assemblies shall be braced by friction type braces, equipped with a
spring locking device to secure the legs in the open and closed
position. Braces shall be secured to the leg assembly with rivets and to
the decking using a minimum of six screws and two bolts installed
through the decking. It shall require only three leg assemblies to fold
when opening or closing each riser unit. Legs shall open and close using
only one hand. Gravity ring type brace locks are not acceptable.
COUPLING
Stage units shall be equipped with drop-in type couplings that allow
stage units of the same or different heights to be joined together. All
couplings shall be permanently secured to each unit. Coupling devices
not permanently attached are not acceptable.
METAL FINISH
All metal parts shall be thoroughly cleaned and phosphatized to enhance
paint adhesion. Metal parts are to be finished with a thermofused epoxy
powdercoating. All painted metal components shall be furnished in black
or brown color.
WARRANTY
All stage components shall be free of defects in materials and
workmanship for a period of ten 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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