Seating structure

Claim 1

A seating structure, comprising: a seating frame; a seating support web disposed in stretched relation across the seating frame; a back frame extending generally vertically with respect to the seating frame; and a back support web disposed in stretched relation across the back frame, wherein at least one of the seating support web or the back support web comprises a warp knit weft-insertion fabric having an elastomeric monofilament yarn in the warp forming a performance side, an elastomeric wrapped filament yam in the weft forming an aesthetic surface and a knit filament yam tying the warp and the weft together wherein the warp knit weft-insertion fabric exhibits a substantially linear stress strain relationship in the warp direction of between about 2 and about 4 pounds force per percent elongation from initiation of loading to failure when measured for tensile strength in the warp direction according to ASTM method D-5034 and wherein the warp knit weft-insertion fabric exhibits a two-stage stress strain relationship in the weft direction such that the fabric undergoes elongation of between about 25 percent and about 65 percent from initiation of loading up to an applied stress of about 10 pounds force and substantially linear elongation in the range of between about 2 and about 4 pounds force per percent elongation with applied stress from about 10 pounds force to failure when measured for tensile strength in the weft direction according to ASTM method D-5034.