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front-to-back at any point, the uncompressed, upholstered <br />seat well shall be no deeper than 1/2 inch below the <br />horizontal plane. <br />8. PADDING: Seat and backrest padding shall be of a high <br />resilient dual density urethane foam with a minimum with a <br />rating of 2.5 density or higher. Backrest and seat <br />padding <br />shall have no corded edges or tufted surfaces that come in <br />direct contact with the user. <br />9. BASE: Base shall be a five (5) star configuration with a <br />250 <br />necessary <br />Chairs <br />the <br />Legs <br />on <br />pound standard weight capacity. Chair design must be <br />proportional to its components and of minimum size <br />to pass BIFMA Stability Test Dynamic 13.3 and 13.4. <br />which offer a slider mechanism option must be tested with <br />slider mechanism and certified as stable. Legs shall not <br />extend beyond the base as to create a tripping hazard. <br />and base shall be scuff resistant and non-damaging to <br />surrounding surfaces. Casters shall be 55 mm hooded, twin <br />wheel, hard plastic casters which roll and swivel easily <br />carpet. Hard surface casters of softer tread shall be <br />available. <br />10. BACKREST: Backrest shall be twelve (12) inches wide or <br />wider <br />concavity. <br />of <br />above <br />acceptable. <br />and vertically convex in the lumbar support region. Any <br />horizontally concave surface shall not exceed 1/2" <br />Standard backrest shall be attached to the frame by means <br />a steel shaft and shall be mid-to-highback size, without <br />headrest. Lowback chairs shall be available upon request. <br />Backrest shall be height adjustable to allow for lumbar <br />support to cover a range from 6.5 inches to 9.5 inches <br />the seat pan when pan is at zero (0) degrees when measured <br />using BIFMA CMD-1-1995 No. 4. A wider range is <br />STATE OF OREGON <br />DEPARTMENT OF ADMINISTRATIVE SERVICES <br />PURCHASING DIVISION <br />