ABOUT THE BACK SCHOOL CHAIR® (PLUS SIZE)
The Back School is pleased to introduce the Plus Size ergonomic chair for taller and larger workers. With a full function control, seat slider option and 2 seat sizes and 2 back sizes, rated at up to 500 lbs., this is the perfect offering for those individuals who need a larger chair. The special heavy duty control, High Lift Cylinder, Aluminum base and 70 mm casters along with the steel frame makes this a perfect ergonomic chair to offer strength, reliability and extra space.
The seat and back are made of 5/8" diameter 14-gauge bent steel tubes.
The seat frame includes two 3/16" thick steel plates welded to the tubes to which are fastened the armrests and the sleigh base. A heavy-duty 3/16" thick steel bridge is welded to the seat frame, to which is bolted the mechanism attached to the cylinder and aluminum base.
The back frame includes widthwise a 1/4" thick x 2" flat steel plate welded to the tubes to which a 3/16" welded steel bridge holding the ratchet device is fastened to provide the height adjustability.
The fixed backrest support consists of a 5/16" x 3" high strength steel (50W) blade. It is screwed to the backrest and under the seat.
Theadjustable backrest support is made of 1/4" x 3" high strength low alloy steel (HSLA) attached to the ratchet device on the back and to the mechanism under the seat.
The whole unit is fastened to the flat steel plate welded to the tube on the back frame. Thread cutting screws are used.
Four (4) plies of flexible woven plastic belts are slipped onto the frames over a canvas support and pulled taut.
The backrest, with foam comfort strips at the lumbar level, is covered with fire retardant 11 /2î thick (38mm) mediumdensity polyurethane foam.
The seat surface consists of a moulded cushion 2" (50mm) of fire retardant urethane foam, covered with an 1" (25mm) thick overlapping cut foam sheet.
All welds are the G.M.A.W type.