All hardwood frame with mortise and tenon joints that are glued, screwed and reinforced with corner blocks that are glued and screwed.
A hardwood U-style brace is attached with wood screws and 1/2" x 1 1/4" x 2" steel corner braces for additional joint strength, to avoid chair frame loosening over time.
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The rear legs are attached with four 5/16" x 2" lag bolts.
Spring seat consists of five 9-gauge springs, covered with a burlap-type fabric with a pre-flex edging around the top of the seat edge for protection. Two Flexilator paper-wrapped spring wires are used to tie the springs together, making the springs durablewith no squeaking.
Foam seat is one piece of 1865 CM high-density foam cut to fit seat, with another piece of 1865 CM high-density foam 1/2" larger laid on top to create a smooth edge and added seat comfort.
The seat apron is 1/4" 1030 CM soft foam with an upholstered pullover seat. All foam is CAL 117-rated, with CAL 133 available on request.
The inside back has one piece of 1" 1030 CM soft foam for back lean comfort, and the outside back has one piece of 1/2" 1030 CM soft foam. Both are upholstered with a double welt gimp.
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