appropriate.
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Back assembly shall consist of an [upholstered] [exposed] steel, plastic or
plywood rear panel with an upholstered steel or plywood front panel. Back
assembly length shall be between 500 and 700 mm 20 and 27-1/2 inches for a
total height of 725 to 950 mm 29 to 38 inches above the floor measured
parallel to the back. Rear panel shall completely conceal and protect the
rest of the seat assembly when in the raised position. Back shall be
[fixed] [rocker] type.
2.2.1.1
Steel Panels
Steel panels shall be fabricated from not less than 1 mm (20 gauge) 20 gauge,
compound-curved, die-formed steel. The perimeter of the front upholstered
panel shall be hemmed.
2.2.1.2
Plastic Panels
Plastic rear panels shall be one-piece injection molded plastic or high
pressure laminated plastic adhered to hardboard or plywood. Color and
texture of plastic panels shall be as selected.
2.2.1.3
Wood Front Panels
Plywood upholstered front panels shall be fabricated from cross-banded
plywood of not less than 3 ply, 9.5 mm 3/8 inch thick hardwood veneers.
2.2.1.4
Foam Padding
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NOTE: Specify polyurethane foam thickness of 32,
38, 50, 75, or 100 mm (1-1/4, 1-1/2, 2, 3, or 4
inches) depending on comfort desired.
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Polyurethane foam shall be high density, fire retardant and shall be not
less than approximately [_____] mm inches in thickness and shall be
securely attached to the steel or plywood panel and completely covered with
the approved upholstery material.
2.2.2
Seats
Foundation for upholstered seats shall be formed of not less than 1 mm (20
gauge) 20 gauge [upholstered] [exposed] steel or electronically glued
hardwood plywood. The seat foundation shall be free from visible screws,
bolts, open holes, and projections on the bottom, front, and sides. [The
front edge of each seat shall be embossed to receive a number plate.] The
upholstered seat unit shall be easily removable without removing the
foundation unit; and the covering shall be fastened to the frame in a
manner that will permit easy reupholstering.
2.2.2.1
Steel Seat Units
Upholstered steel seat unit shall be coil-spring type construction or
nonsag spring-type construction. Springs shall be attached to a die-formed
steel framework. Coil-spring units shall contain no less than 16 coil
springs. Springs shall be connected in both directions to control spring
axial depression. Nonsag spring units shall contain at least five
SECTION 12610
Page 7
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