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425/specs/06-10b

Texas Specification No. 425-06-10B

Effective Date: July 25, 1994

Reformatted Date:

Specification

for

CHAIRS, OFFICE, ERGONOMIC

1. SCOPE: This specification establishes requirements for ergonomic office chairs designed to fit environments to people and the tasks they perform. Seating shall be designed to minimize the adverse effects of the body from sitting, and shall provide comfort for any body shape.

2. APPLICABLE SPECIFICATIONS AND STANDARDS: Reference to specifications, standards, test methods, and other documents shall be to the issues in effect on the date of the Invitation for Bids. Copies of the referenced documents may be obtained from the issuing organizations at the addresses shown. The following publications form a part of this specification to the extent specified herein:

2.1. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI), 1430 Broadway, New York, NY 10018:

2.1.1. ANSI/BIFMA X5.1-85 -- General Purpose Office Chairs, Tests.

2.1.2. ANSI/HFS 100-88 -- Human Factors Engineering of Visual Display Terminal (VDT) Workstations.

2.1.3. ANSI Z34.2-87 -- Self Certification by Producer or Supplier.

2.2. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM), 1916 Race Street, Philadelphia, PA 19103:

2.2.1. ASTM D 3574 -- Method of Testing Flexible Cellular Materials: Slab, Bonded, and Molded Urethane Foams.

2.2.2. ASTM D 3770 -- Standard Specification for Flexible Cellular Materials: High-Resilience Polyurethane Foam (HR).

2.2.3. ASTM D 4157 -- Method for Abrasion Resistance of Textile Fabrics (Oscillatory Cylinder Method).

2.3. BUSINESS AND INSTITUTIONAL FURNITURE MANUFACTURERS ASSOCIATION (BIFMA), 2335 Burton SE, Grand Rapids, MI 49506:

2.3.1. BIFMA X5.7-91 -- Upholstered Furniture Flammability Standard for Nonresidential, Non-Live-In Occupancies.

2.4. FEDERAL SPECIFICATIONS: Superintendent of Documents, U.S.Government Printing Office, Washington, DC 20402:

2.4.1. A-A-2235 -- Chairs, Rotary, (Office, Ergonomic, Upholstered).

2.4.2. CCC-A-680A -- Artificial Leather (Cloth Coated), Vinyl Resin, Expanded Layer, (Upholstery).

2.4.3. CCC-C-700J -- Cloth, Coated, Vinyl Coated (Artificial Leather).

2.4.4. TT-C-490 -- Cleaning Methods for Ferrous Surfaces and Pretreatments for Organic Coatings.

2.5. STATE OF CALIFORNIA, DEPARTMENT OF CONSUMER AFFAIRS, BUREAU OF HOME FURNISHINGS AND THERMAL INSULATION, 3485 Orange Grove Avenue, North Highlands, CA 95660:

2.5.1. Technical Bulletin 117 -- Requirements, Test Procedure and Apparatus for Testing the Flame Retardance of Resilient Filing Materials used in Upholstered Furniture.

3. CLASSIFICATION: Ergonomic chairs shall be classified by type, shell style, and height as follows:

3.1. Type:

3.1.1. Type I: Posture Back (separate seat and back), fixed seat, with height adjustment, and manually adjustable back.

3.1.1.1. Style I: Two piece, double shell back with vinyl molding on seat perimeter (plywood or thermoplastic inner shell).

3.1.1.2. Style 2: Two piece, double shell on back and seat (plywood or thermoplastic inner shell).

3.1.2. Type 2: Posture Back (separate seat and back) forward-tilt seat, with height adjustment and manually adjustable back.

3.1.2.1. Style I: Same as Type I.

3.1.2.2. Style 2: Same as Type I.

3.1.2.3. Style 6: Same as Style 2 with adjustable arms.

3.1.3. Type 3: Synchronized Articulation seat and back, with height adjustment, variable back stop.

3.1.3.1. Style 3: One piece or two piece double shell (plywood or thermoplastic back inner shell and thermoplastic seat inner shell).

3.1.4. Type 5: Guest chair, with or without arms, sled base or four-legged (per manufacturer's standard construction), to match Types I, 2, 3, and 7.

3.1.5. Type 7: Low/No Front Rise, Knee Tilt flexible shell, seat height and tilt tension adjustments, tilt-pivot behind the knees, or no-front-rise tilt mechanism.

3.1.5.1. Style 7: One piece or two piece flexible shell of injection molded thermoplastic polyester, polyethylene, or polystyrene.

3.2. Height: See dimensional Tables.

3.2.1. Height A: High-back, large size (Types I, 2, and 3).

3.2.2. Height B: Medium size (Types I, 2, 3, and 7).

3.2.3. Height C: Small size (Types I, 2, 3, and 7)..

3.2.4. Height D: Mid-back, (Type 5).

4. DEFINITIONS: Terminology used in this specification is intended to be generic in nature and consistent with meanings that have been defined through general use and/or accepted trade practices. Where variant meanings may exist, the applicable interpretation shall be determined by the Texas Procurement and Support Services (TPASS).

4.1. Commission: Texas Procurement and Support Services (TPASS).

4.2. Ergonomic Chair: A chair that, as a minimum, is designed to support the back in its natural curve, distribute the body's weight evenly, and minimize pressure on the thighs behind the knees. Adjustment mechanism allow quick and easy adjustments to be made by the occupant. These adjustments may include a combination of seat height, seat pitch angle, back height, back upright tilt angle, back tilt tension, and adjustable arms. By changing one or more of these adjustments several times a day to allow for movement in the chair, user fatigue is lessened.

4.3. Flexible Shell: Shell flexes as the user moves, including structural flexibility.

4.4. Low Front Rise: When reclining, the degree of seat tilt is minimal.

4.5. No Front Rise: When reclining, the front of the seat is fixed and remains level.

4.6. Normal Use: Use which can reasonably be expected in a general office setting operating on a standard 40 hour work week. Normal use shall include incidental bumps and scrapes which can occur while sitting in, swiveling, tilting or moving the chair in close proximity to desks, walls or other objects.

4.7. One Piece Shell: A unitary inner or outer shell.

4.8. Posture Back: Regardless of seat adjustment, the chair with a posture back shall provide tension adjustment of the back upright tilt angle, or allow for "setting" the tilt angle or free flow of the back upright tilt.

4.9. Synchronized Articulation: A jointed movement, in which the seat movement occurs concurrently with the back movement: a synchronized seat and back tilt. The articulation shall be approximately 2:1.

4.10. Tilt Back: Chair that provides a counter balancing force through a range of back tilt motions.

4.11. Tilt Seat: Chair that provides a counter balancing force through a range of motion.

4.12. Two Piece Shell: A separate seat and back.

5. REQUIREMENTS: All chairs furnished under this specification shall meet or exceed the following requirements, and those specific requirements of Paragraph 20.

5.1. General Requirements:

5.1.1. All chairs shall be new, unused, and a currently standard product of an established manufacturer except for such deviations as may be required by this specification.

5.1.2. Chairs shall present a neat, well finished appearance and shall be free of all imperfections and/or defects which might affect appearance, normal life, safety or serviceability.

5.1.3. Chairs shall have a wide range of adjustments as specified. Tools shall not be required.

5.1.4. Body weight shall be raised in order to raise seat height when the chair has a pneumatic height adjustment.

5.1.5. Chairs other than guest chairs shall provide full 360 swivel operation.

5.1.6. Chairs with adjustable back and seat height shall be furnished with a locking mechanism.

5.1.7. Chairs with tilting backs and/or seat shall be provided with tilt angle controls and locking mechanism.

5.1.8. Backrest shall be contoured for comfort and body support, and provide lumbar support.

5.1.9. Seat shells shall be contoured (compound curve), shall be designed for maximum posterior support and shall have rolled edges.

5.1.10. The upholstery shall be properly tailored and free from wrinkles, rolls, sags or other defects in appearance. Seams shall be straight, and free from broken threads and loose ends. The upholstery shall be attached to the chair in a manner that is free from hazards and designed to prevent slippage and excessive wear. All raw edges shall be completely concealed.

5.1.11. All exposed metal surfaces shall be corrosion resistant.

5.1.12. Bolts and screws, or other fastening devices shall be adequate to maintain the chairs structural integrity and to meet the specified warranty period. Fasteners securing the back and seat to the shell, and the arms to the shell, shall not loosen under normal use.

5.1.13. All chairs shall be designed for normal use.

5.1.14. Details not specified herein shall be in accordance with standard commercial practices for products of this type.

5.2. Colors: The colors of the chair finish, seat edging, and upholstery shall be selected from the manufacturer's standard colors, or as specified in the Invitation for Bids.

5.3. Dimensions: Dimensions shall be as shown in the Table for each Type, and in Paragraph 5.4. See Paragraphs 20, 21, and 22 for individual dimensions.

Regardless of the ranges shown, the series offered must have at least three distinct manufacturer's standard chair sizes for Types I, 2 and 3, and at least two distinct chair sizes for Type 2 Style 6, and Type 7.

See Attachment No. Four for methodology.

5.4. Ergonomic Requirements:

5.4.1. All chairs shall conform to the applicable seating requirements of Section 8 of ANSI/HFS 100.

5.4.2. Chairs shall be designed for various postures of most users, and enhance work posture and comfort when seated.

5.4.3. Chairs shall allow freedom of movement and reduce the amount of strain on the spine.

5.4.4. Chair adjustment controls shall be convenient and shall not release or change after being set. Controls shall not pose a safety problem during activation.

5.4.5. If provided, armrests shall not interfere with proper work posture. Armrests shall allow for lateral thigh movement.

5.4.6. The minimum range of adjustment for seat height shall be 10.0" -- 20.5".

5.4.7. Chairs shall have contoured seats and backs with HR foam lumber reinforcements.

5.4.8. Seat depth shall permit contact with the seat back in the lumbar area.

5.4.9. Seats shall be designed to avoid pressure on the lower leg, and have a front edge relief design such as a "waterfall contour".

5.4.10. The minimum seat depth shall be 15".

5.4.11. The minimum seat width shall be 18", measured at the spindle (or geometric) center of the seat.

5.4.12. The minimum back width shall be 12" in the lumbar region.

5.4.13. The minimum backrest height shall be 15" (back cushion): See Figure 3A, Attachment No. Four.

5.4.14. Chairs shall have a backrest which:

has sufficient contour to provide adequate support for the operator's lumbar and middle back area;

has a lumbar support that is concave in the horizontal direction, convex in the vertical direction, sufficient to preserve appropriate curvature of the lower back when the operator is seated with the operator's back resting against the back of the chair;

includes a middle back support area that extends upward from the seat approximately 13".

5.4.15. The back tapered shape shall support the spine at L3 and L5 vertebra, and shall do so without restricting arm and upper body movement.

5.4.16. The minimum inside distance between armrest shall be 18".

5.4.17. All chairs (except side) shall be provided with casters.

5.4.18. Caster spread shall be equal to or greater than overall seat width.

5.5. Materials:

5.5.1. Outer Shell: The outer shell shall be made from impact and mar resistant thermoplastic with molded-in color to match the colored base.

5.5.2. Padding Material: The seat and back cushions for Posture Back chairs (Types I and 2), Articulating chairs (Type 3) and Flex Shell, knee tilt chairs (Type 7) shall consist of foam, glued or attached to a plywood or plastic base.

The padding shall be high grade, high resilience, polyurethane foam Grade HR (ASTM D 3770). Foam shall be contoured.

Padding shall consist of one of the following:

1. Multi-layer, multi-density foam, or;

2. Multi-layers of sculptured foam, or;

3. Multi-density, contoured sculptured foam, or;

4. Contoured, injection molded foam, or;

5. Padding with molded-in wire that snaps into the shell, or;

6. Foam glued to an injection molded polypropylene back ring and seat ring assembly that snaps to the chair inner shell and is held in place with posts and snaps.

Padding shall be minimum 1-1/2" thickness; except Type 3 back padding shall be a minimum 1-3/4" thick and seat padding shall be a minimum of 2" thick.

All foam shall be flame retardant meeting the requirements of California Technical Bulletin #117, and be securely bonded to the shell or shell rings.

5.5.3. Vinyl Upholstery Material: Vinyl upholstery shall be fabric backed and shall have a minimum weight of 23 ox per linear yard (54" width) and shall meet or exceed the applicable requirements of Federal Specifications CCC-C-700J and CC-A-680A, Class 2, minimum.

The material shall be mildew and flame retardant, and the finish or grain shall be smooth or simulate top grain leather. The vinyl shall be securely glued to the foam cushion in all high contact areas.

5.5.4. Nylon Upholstery Material: 100% Nylon material shall be abrasion resistant, exceeding 25,000 double rubs on the Wyzenbeck Test (ASTM D 4157), and shall be flame retardant, meeting the requirements of California Technical Bulletin #117, and stain resistant with a minimum weight of 14 oz per linear yard.

The nylon shall be securely glued to the foam cushion in all high contact areas.

5.5.5. Nylon/Wool Blend Upholstery Material: When so specified in the Invitation for Bids, a minimum 60% wool/40% nylon fabric with a minimum weight of 14 oz per linear yard shall be provided. The nylon or equivalent fabric portion may have other fibers.

The materials shall be abrasion resistant, exceeding 25,000 double rubs on the Wyzenbeck Test (ASTM D 4157), and shall be flame retardant, meeting the requirements of California Technical Bulletin # 117, and stain resistant.

The nylon/wool blend shall be glued to the foam cushion in all high contact areas.

5.5.6. Olefin Upholstery Material: When so specified in the Invitation for Bids, 100% "Marquesa Lana" fabric shall be provided. The fabric shall be abrasion resistant, exceeding 250,000 double rubs on the Wyzenbeck Test (ASTM D 4157), and shall be flame-retardant, meeting the requirements of California Technical Bulletin # 117.

5.5.7. Wool Upholstery Material: When so specified in the Invitation for Bids, 100% wool fabric shall be provided with a minimum weight of 17 oz per linear yard. The wool shall be securely glued to the foam cushion in all high contact areas.

5.5.8. Dual Wheel Casters: Tread material shall be rubber or plastic, with the hardness dependent of the application (tile or carpet) with a minimum shore durometer D-scale hardness of 35 -- 50.

5.5.9. Base Covers: Bases which have an enamel finish shall be protected with scuff plates or plastic covers or shells.

5.6. Finish:

5.6.1. Outer Shell: The thermoplastic outer shell shall have a non-glare textured finish and an integral "molded in" color. It shall not chip, peel, or discolor. Applied finishes are not acceptable.

5.6.2. Base Finish: A thermo-set, epoxy resin dry powder coating, electrostatically applied, shall be furnished for swivel chairs. There shall be no indication of rust or decay under the coating. As an alternate, the base may be covered with a protective plastic cap constructed in a manner that will prevent scratching. A monochromatic base to match the outer shell color shall be standard for swivel chairs.

Guest chair (Type 5) frame and arms may have a permanently bonded, fused powder-coated epoxy finish, or a high abrasion spray paint finish. Base color shall match the shell.

All surfaces shall be thoroughly cleaned and free of dirt, oil, grease, moisture, or other foreign material prior to finish, and shall show no evidence of chipping. The cleaning and priming of the surfaces shall conform to one of the methods of Federal Specification TT-C-490, at the manufacturer's option.

5.6.3. Chrome Finish: When so specified in the Invitation for Bids, an optional electroplated chrome finish shall be available for swivel bases. The base shall be subject to the manufacturer's standard electrical and chemical cleaning process. Chrome shall be plated over a nickel base. The chrome shall be corrosion and chip resistant.

A polished aluminum finish may be substituted.

5.7. Flammability Requirements: Finished chairs and component materials shall meet or exceed the flammability requirements of BIFMA X5.7 and California Technical Bulletin # 117.

5.8. Options: When so specified in the Invitation for Bids, chairs shall be furnished with the following options:

5.8.1. Upholstered Outer Shell: A full fabric back (applied over the outer plastic shell or structural shell) shall be available.

5.8.2. Seat Height Adjustment: The height control for Types I, 2, 3, and 7 shall be pneumatic.

5.8.3. Arms: Types I, 2, 3, and 7 shall be available with arms.

5.8.4. Arm Caps: Types I, 2, 3, and 7 shall be available with upholstered arm caps.

5.8.5. Adjustable Arms: Type 2, Style 6 and Type 3 shall be available with adjustable height arms.

5.8.6. Base Finish: A chrome or polished aluminum finish shall be available. See Paragraph 5.6.3.

5.8.7. Dual Wheel Casters: Casters for use on tile (hard floor) shall be available. See Paragraph 5.5.8.

5.8.8. Upholstery: See Paragraphs 5.5.3., 5.5.4., 5.5.5., 5.5.6., and 5.5.7.

5.9. Color Charts: Bidders shall be responsible for furnishing to each using agency a color chart showing the manufacturer's standard colors and/or finishes.

6. TESTING: Testing shall be done by, or at the direction of, the Commission and/or the receiving State agency. Tests shall be performed on products from shipments to ordering agencies. In the event products tested fail to meet or exceed all conditions and requirements of this specification, the cost of the samples used and the cost of testing shall be borne by the supplier.

6.1. Tests: The products furnished under this specification shall be tested by the following methods or approved equally applicable procedures:

6.1.1. ANSI/BIFMA X5.1.

6.1.2. Casters: Test in accordance with Paragraph 18.3.(1) of ANSI/BIFMA X5.1. Minimum D-scale hardness shall be 35 --50.

6.2. Certification: The vendor shall submit laboratory test results from the manufacturer to the Commission with the bid. See Attachment No. One.

7. SAMPLES: When so specified in the Invitation for Bids, prepurchase samples shall be required. Samples shall be obtained from products supplied on regular orders.

8. INSPECTION: Products furnished under this specification shall be inspected by, or at the direction of, the Commission and/or the ordering State agency either at the destination or place of manufacture.

9. WARRANTY: All chairs shall carry the manufacturer's standard warranty and shall be guaranteed against defects in materials, workmanship, and performance for a minimum of five (5) years. The warranty shall begin on the date of acceptance of the unit by the ordering agency. During this warranty period, the vendor shall repair or replace defective components and/or units at no cost to the State of Texas.

9.1. Guarantee: The vendor shall guarantee that the chairs will be a standard and continuing item in the manufacturer's product line. The chairs shall be identifiable by regular catalogue numbers.

10. AVAILABILITY OF SERVICE: Factory authorized service shall be available within the State of Texas.

10.1. Service: When so specified in the Invitation for Bids, the bidder shall submit a current list of companies or individuals, and their addresses, who can perform service on the products furnished.

10.2. Parts: An adequate supply of repair parts shall be carried in stock within the State of Texas for the expected life of all products furnished under this specification, or factory response time shall be timely and satisfactory if out-of-state.

11. INSTRUCTION BOOKS and/or MANUALS: The vendor shall provide an accurate, concise instruction publication with effective, understandable guidelines for the user to assure optimum results from the adjustable mechanisms with each and every chair. Should the agency personnel need further instruction, bidders must provide telephone information as requested by the agency. The instruction books and/or manuals shall accompany the chair when shipped.

12. PACKING and/or PACKAGING: Packaging for shipment shall be in accordance with the manufacturer's standard practice and in a manner readily accepted by common carriers engaged in interstate commerce. Within the shipping carton, units shall be packed in a manner designed to minimize damage during shipment due to rough or improper handling.

13. MARKING and/or LABELING:

13.1. Marking: Each shipping container shall be clearly marked with:

13.1.1. Name of contents.

13.1.2. Quantity.

13.1.3. Name and address of the manufacturer.

The container or shipping documents shall include:

13.1.4. Order number or contract number.

13.1.5. Name and address of ordering agency.

13.1.6. Agency requisition number.

13.2. Labeling: Each chair shall bear a securely affixed and durable label showing the following:

13.2.1. Manufacturer's name or;

13.2.2. Manufacturer's trademark.

14. BID LITERATURE: All bids shall be accompanied by a complete and illustrated description of the products being offered.

15. COMPLIANCE: In order for consideration to be given to the bid on an item under this specification, the bidder must comply with the following:

15.1. Product Identification: The make, model number, name of the manufacturer, brand or trade name, etc., as applicable, of the item which the vendor proposes to furnish must be stated as part of the bid.

15.2. Exceptions: Notwithstanding the above, any exception taken by the bidder to the requirements and conditions of this specification must be stated and described in detail as a part of the bid. If no exceptions or deviations are identified in this manner, the items must be furnished exactly as described herein.

15.3. Proof: The bidder shall bear the burden of proof of compliance with this specification.

15.4. Bid Response: When so specified in the Invitation for Bids, bidder shall provide a line by line item written answer to all technical specifications.

15.5. Certification: When so specified in the Invitation for Bids, bidders shall provide testing lab certification from the manufacturer that the chairs meet the requirements of ANSI/BIFMA X5.1. See Attachment No. One.

16. REFERENCED MANUFACTURES: The following manufacturers are listed for reference purpose only. Such references are not meant to be restrictive. Listing does not relieve the manufacturer and/or vendor from meeting each requirement of this specification.

16.1. Posture Back Chair (Type I, Style 1): Biofit Offset Series, Eck-Adams 8200.

16.2. Posture Back Chair (Type I, Style 2): TCI (Texas Correctional Industries).

16.3. Posture Back Chair with Forward-Tilt Seat (Type 2, Style I): TCI (Texas Correctional Industries).

16.4. Posture Back Chair with Forward-Tilt Seat (Type 2, Style 2): TCI (Texas Correctional Industries).

16.5. Posture Back Chair with Forward/Rear Tilt Seat and Adjustable Arms (Type 2, Style 6): TCI (Texas Correctional Industries).

16.6. Synchronized Articulation Chair (Type 3): Charvoz Syncroline, GF Syntop, Steelcase Sensor.

16.7. Low/NO Front Rise, Knee Tilt Chair (Type 7): Allsteel Buhk 100, GR ErgoTek, Haworth Catalyst, Herman Miller Equa, and Steelcase Rally.

17. PRODUCT INFORMATION:

17.1. Body Size: When ordering chairs, the agency should consider the various sizes and heights of the occupants. Reference Attachment No.'s Two and Three for detailed criteria in performing an internal evaluation when selecting chairs.

17.2. Task: Multi-task work, where movement around the office occurs, minimizes strain and is less fatiguing than dedicated-task work.

Dedicated-task work may involve a deliberate shift in chair position, and preference of one type of chair over another.

17.3. Assessment: Agencies may want to get advice on suitability of the chair design to the work environment from the Vendor and/or the Manufacturer Customer Service.

18. ORDERING DATA: When ordering products conforming to this specification the requisitioning agency shall specify the following:

18.1. The number of this specification (425-06-10B).

18.2. Type (See Paragraph 3.1.)

18.3. Size (See Paragraph 3.2.).

18.4. Color (See Paragraph 5.2.).

18.5. Options (See Paragraph 5.9.).

18.6. Type of delivery desired (See Paragraph 12.1).

18.7. Quantity of each type, size and color required.

19. AVAILABILITY OF SPECIFICATIONS: Copies of this specification may be obtained by calling or writing:

Bid Services

Texas Procurement and Support Services

P.O.Box 13186

Austin, TX 78711-3047

(512) 463-3416

20. DESIGN REQUIREMENTS: Guest Chair (Type 5)

TABLE No. ONE (1)

DESIGN REQUIREMENTS

DIMENSIONS

(In inches)

Overall Overall Seat Seat Seat Back Back
Type Height Description Height, min. Fig.1A Width, Fig. 1B Height, Fig. 2A Width, Fig. 2B Depth, Fig. 2A Width, min.

Fig. 3B

Height, min. Fig. 3A.
5.00 Mid-Back Guest Chair, Shell Back 31.00 20-24 w/arms 16--18 18-2 15-20 17.00 17.00
  1. Overall height and seat height with glides.

20.1. Outer Shell: Side chair outer shell shall match Types I, 2, 3, and 7 chair construction. Thermoplastic outer shell shall be provided. Optional upholstered outer backs are unacceptable unless the upholstery covers the plastic outer shell.

20.2. Inner Shell: Side chair inner shell shall match Types I, 2, 3, and 7 chair construction.

20.3. Frame: The side chair frame shall be minimum 18 gauge steel tubing if reinforced with 13 gauge inner reinforcement tube steel, or 12 gauge if reinforce with injected polyurethane foam, or 13 gauge steel tubing with cast aluminum arm supports, or 16 gauge side and rear frames welded to 14 gauge front stretcher and top strap.

The arm shall be integral with the chair frame, or welded to the frame, or arm support attached mechanically to chair frame using two screws with lock washers, or two self-locking tapered head screws. Back straps shall be a minimum 2-1/4" wide, flat bar stock steel.

Alternately, the back inner shell may be secured to the chair frame directly by using four bolts with "T" nuts (bolts shall be concealed) or the inner polypropylene shell may be secured to the inner steel frame using eight sheet metal screws.

20.4. Seats and Backs: The foam cushion shall be securely glued or injection molded of a contoured molded thermoplastic or plywood base (See Paragraph 5.5.2.).

20.5. Arms: Side chair armrest supports shall be die cast aluminum or steel core assembly, and shall have a high gloss electrostatically applied, high build epoxy powder coated or resilient urethane to match the frame.

Arms shall be easily installed or removed in the field (on-site). If side chair design incorporates an integral arm construction, removable arms are unnecessary. Fasteners for the arms shall be hidden from view when the chair is in a normal upright position.

Arm style (slanted look style or "D" shape, or "T" shape) shall be designed to not interfere with worker's ability to get close to the worksurface and shall provide elbow rest. Arm rest shall allow the lateral thigh movement.

20.6. Arm Pads: Arm pads or armrest caps may be thermoplastic, vinyl, nylon, or urethane of the manufacturer's standard construction, to match the arms.

20.7. Base: Base shall be a sled or four-legged style, to match the design of Types I, 2, 3, and 7.

20.8. Finish: Side chairs shall be provided with a painted or epoxy resin powder coat finish. See Paragraph 5.6.2.

20.9. Glides: Glides, if necessary due to frame design, shall be color coordinated, and shall be monochromatic plastic, clear plastic, or stainless steel. They shall be removable without special tools, but not be easily separated from the base.

21. DESIGN REQUIREMENTS: Posture Back Chairs (Types I and 2).

TABLE No. TWO (2)

DESIGN REQUIREMENTS

DIMENSIONS

(In inches)

Type Size Description Overall Height, Fig. 1A Overall Width, Fig. 1B Seat Height, min. Fig. 2A Seat Width, Fig. 2B Seat Depth, Fig. 2A Back Width, Fig. 3B Back Height, Fig. 3A Base Span
1.00 A Posture Back, No Arms

Style 1, 2

36-47 18-24 w/arms

24-25

16--20.5 18--24 15--21 18--21 20--25 23--28
1.00 B Posture Back, No Arms

Style 1, 2

31-44 18-23 w/arms

22-25

16--20.5 18--22 15--21 15--19 15--21 21--26
1.00 C Posture Back, No Arms

Style 1, 2

30-40 18-23 w/arms

22-25

16--20.5 18--21 15--18 15--19 15--20 21--26
2.00 A Posture Back, No Arms, Forward Tilt

Style 1, 2

36-47 18-24 w/arms

24-26

16--20.5 18-24 15-21 18-21 20-25 23-28
2.00 B Posture Back, No Arms, Forward Tilt

Style 1, 2

31-44 18-23 w/arms

22-25

16--20.5 18-22 15-20 16-19 16-21 21-26
2.00 C Posture Back, No Arms, Forward Tilt

Style 1, 2

30-40 18-23 w/arms

22-25

16--20.5 18-21 15-18 15-19 15-20 21-26
2.00 A Posture Back, Seat Tilt, Shell Back & Seat, Adjustable Arms, Forward Tilt

Style 6

35-47 w/arms

25-27

16--20.5 18-24 15-21 17-20 18-25 23-28
2.00 B Posture Back, Seat Tilt, Shell Back & Seat, Adjustable Arms, Forward Tilt

Style 6

30-44 w/arms

24-27

16--20.5 18-21 15-20 16-20 15-21 22-25
  1. Measurements with seat and back in lowest position, with casters.

21.1. Chair Controls:

21.1.1. Type I: Posture Back chairs shall have adjustments of seat height, back height and back tilt angle. The controls shall allow for free flowing dynamic back tilt action through coil spring, lever activated slip/hing spring, or lever activated pneumatic tilt mechanism.

21.1.2. Type 2: Posture Back with forward tilt seat chairs shall be the same as Type I with the addition of a forward tilt seat adjustment. The control shall provide a static seat angle adjustment through a tilt lock lever, or activated slip/hinge spring, or lever activated pneumatic tilt mechanism.

21.2. Outer Shell:

21.2.1. Style I: Chairs shall have a unitary molded high impact, color impregnated, thermoplastic outer shell on the back. The outer seat perimeter shall be covered with a vinyl (or equal) edging that protects the upholstered seat cushion. The seat bottom shall be covered with black Typar, fabric or equivalent material.

21.2.2. Styles 2 and 6: Type I and Type 2 with forward tilt seat chairs shall have a unitary molded high impact, color impregnated, thermoplastic outer shell on both the seat and back.

21.3. Inner Shell: All posture back chairs and chairs shall have flexible contoured inner seat and back shells constructed of minimum 7 ply, minimum 1/2", hardwood, upholstery grade, plywood base, and/or molded contoured thermoplastic base.

21.4. Seats: Foam cushions shall be glued or injection molded to the base (See Paragraph 5.5.2.). If the seat support is plywood, the upholstered shell shall be securely attached to the frame with screws, or bolt through "T" nuts concealed in the shell, to not detract from the clean line of the chair.

21.5. Backs: Foam cushions shall be glued or injection molded to the base (See Paragraph 5.5.2.). Back uprights shall attach through an enclosed back hinge. Chairs shall have field (on-site) replaceable cushions.

21.6. Seats and Backs: Upholstered back and seat assemblies shall be firmly secured to the outer shell. Upholstery shall be bonded to foam in the contoured areas of the chairs. Optional upholstered outer backs and seats are unacceptable unless the upholstery covers the thermoplastic outer shell.

21.7. Arms: All chairs shall be available with optional arms. The arms shall consist of a cast aluminum assembly which is coated with a resilient urethane, electrostatically applied high build epoxy coating or coated with a vinyl with color impregnated throughout, or a plastisol; or a steel core assembly coated with resilient urethane or vinyl with color impregnated throughout, or integral colored, textured, glass reinforced polyester or injection molded glass filled nylon with vinyl coating or injection molded polyamide with molded in steel attachment brackets.

Material type shall not cause damage to worksurfaces. Outer vinyl surfaces shall have a uniform finish with no exposed seams. Arm color shall match shell color.

Style 6 chairs shall be equipped with arms consisting of steel column assembly, and armrest pads of self skinning polyurethane foam or integral colored, textured resilient thermoplastic. Arms shall have a minimum of 2" of adjustment.

Fasteners for the arms shall be hidden from view when the chair is in a normal upright position.

Arm style (slanted loop or "D" or "T") shall provide adequate elbow rest. Arms shall be easily installed or removed in the field (on site).

21.8. Arm Pads: Arm pads shall be cantilever or "T" shape, with plastic or rubberized or molded flexible vinyl caps over polyurethane foam or textured resilient thermoplastic or injection molded glass filled nylon with a vinyl coating. Optional fabric caps, matching the fabric on the seat and back, if so specified in the Invitation for Bids, shall be available.

21.9. Base: Chairs shall have a swivel base with a 5-leg "star" design. Base shall be free of sharp edges or protrusions and be equipped with dual wheel casters.

The base shall be high strength, heavy duty, cast aluminum alloy, or die formed or welded steel. arm steel tubing shall be minimum 16 gauge. Alternately, the entire base may be of solid injection molded ABS (Acrylonitrile Butadiene Styrene) or injection molded, color impregnated glass reinforced nylon (polyamide) thermoplastic with a minimum static load capacity of 3.000 lbs.

Metallic surfaces shall be scuff resistant. Color shall match shell color. An optional chrome or polished aluminum finish, when so specified in the Invitation for Bids, shall be available. See Paragraph 5.6.3.

Style 6 chairs may be furnished with polished chrome foot plates.

21.10. Casters: Caster shall swivel in a bushing or bearing designed for long life. They shall be hard composition, minimum 2" dual wheels, for use on carpet unless otherwise specified in the Invitation for Bids. They shall be the replaceable stem and socket type, 360 swivel, and not be easily separated from the base.

Note: All casters must comply with 18.3.(1) OF ansi/bifma x5.1. Perform the soft tread caster test on all chairs. Disregard the hard tread caster test.

21.11. Base Column: Types I and 2 shall be available with optional height adjustment pneumatic cylinder. The cylinder shall be equipped with a heavy duty shock absorber, minimum 7 mil (polyurethane or rubber ring in base of cylinder assembly or heavy duty compression spring in the base tube) to cushion impact with the seat in the lowest height position. (Example: Suspa #17-4 Series, Stabil U.S.A. #MK3-5 series, or equal, with shock absorber).

The column shall be finished in a monochromatic color matching the outer shell.

21.12. Mechanism and/or Controls:

21.12.1. All control components for back inclination and seat height adjustment shall be mounted in a heavy duty steel or cast aluminum alloy assembly.

21.12.2. There shall be no design characteristics for mechanical castings or components that will negatively affect appearance serviceability or that could cause personal injury or damage to clothing. The outer perimeter of the seat support for Style I chairs shall be designed of, or covered with, a resilient material.

21.12.3. Back angle shall be changeable, independent of seat, utilizing a control device. Control shall provide balance resistance through full range of reclination, free float action, and for locking in any position throughout the adjustment range. A manual back tension adjustment is preferred but not mandatory.

21.12.4. Height A chairs shall be available with an optional low silhouette swivel tilt control with rubber stops, front and rear. Adjustable seat tilt tension shall be provided.

21.12.5. Seat height shall be manually adjustable, and available with an optional pneumatic adjustment which utilizes a single button or lever located on the underside of the seat. Manual height adjustment shall be effected by rotating the chair or by a "handwheel" or "handbell". The height adjustment range shall be minimum 4-1/2".

21.12.6. The pneumatic seat height shall be locked in any position within the height adjustment range.

21.12.7. The back cushion height adjustment shall lock multiple positions within the range. The height adjustment range shall be minimum 2".

21.12.8. All adjustment to back height and back angle shall be capable of being made while the user is seated.

21.12.9. The devices for operation of seat and back adjustments may, by manufacturer's design, be multifunctional (this is not mandatory).

21.12.10. For Posture Back forward-tilt seat chairs (Type 2), the seat angle (forward tilt) shall be easily changeable by utilizing a control lever on the underside of the seat. Control shall provide balanced resistance through full range of declination, free float tilt action and for locking in any position throughout the adjustment range.

21.12.11. For Posture Back forward-tilt seat and adjustable arms chairs (Type 2, Style 6) back angle tilt shall be changeable independent of seat inclination or have synchronized movement with forward seat tilt. Arms shall be adjustable in height minimum 2".

21.13. Swivel: Chairs shall swivel with continuous seat rotation.

22. DESIGN REQUIREMENTS; SYNCHRONIZED ARTICULATION (Type 3):

22.1. Chair Controls: Type 3 Synchronized Articulation chairs shall have adjustment of seat height and tilt tension. Back and seat articulation shall be controlled with self-adjusting pneumatic controls, or by two torsion coil springs supported by a nylon sleeve covering a spring axle.

Back and seat shall have a continuous articulation (reclination shall be coordinated) and allow the user's feet to remain flat on the floor during the full tilt range. The back to seat articulation ratio shall be approximately 2:1. The control shall allow for static posture settings (variable set angles) or allow the back to have the capability to be stopped from tilting further in any position within the inclination range.

TABLE No. THREE (3)

DIMENSIONS

(SEE ATTACHMENT No. FOUR)

Type Size Description Overall Height, Fig. 1A Overall Width, Fig. 1B Seat Height, min. Fig. 2A Seat Width, Fig. 2B Seat Depth, Fig. 2A Back Width, Fig. 3B Back Height, Fig. 3A Base Span
3.00 A Articulating Seat and Back w/Arms, Shell Back and Seat

38-47 w/arms

25-28

16--20.5 18--24 15--21 19--21 21--25 23--28
3.00 B Articulating Seat and Back No Arms, Shell Back and Seat

35-44 20-21 w/arms

24-26

16--20.5 18--22 15--20 18--20 18--23 23--25
3.00 C Articulating Seat and Back No Arms, Shell Back and Seat

34-43 18-2 w/arms

23-25

16--20.5 18--20 15--17 16--19 16--22 22--25
  1. Measurements with seat and back in lowest position, with casters.

22.2. Outer Shell: Synchronized Articulation chairs shall have a unitary one-piece or two-piece, molded high impact, color impregnated, thermoplastic outer shell on the seat and back.

22.3. Inner Shell: Synchronized Articulation chair back support inner shell shall be constructed of a molded, contoured, minimum 7 ply Birch plywood laminate, approximately 5/16" thick, formed under a high pressure process. The seat inner shell shall be molded contoured thermoplastic base.

Or alternatively, the inner shell of the back and seat shall be of one piece hinged injection molded polypropylene construction. This one piece inner shell shall be reinforced with a steel structure attached to the tilting mechanism. The steel structure shall be bolted to the inner shell with "T" nuts.

22.4. Seats and Backs: Foam cushions shall be glued or injection molded to a molded contoured thermoplastic or plywood base. Seat padding shall be minimum 2: thick (See Paragraph 5.5.2.).

Chairs shall have filed (on-site) replaceable cushions.

All back cushion assemblies shall support the lumbar area.

Upholstered back and seat assemblies shall be firmly secured to the outer shell. Upholstery shall be bonded to foam in the contoured areas of the chairs.

Optional upholstered outer backs and seats are unacceptable unless the upholstery covers the thermoplastic outer shell.

22.5. Arms: All chairs shall be available with optional arms.

The arms shall consist of a cast aluminum assembly which is coated with a resilient urethane, electrostatically applied high build epoxy coating or coated with a vinyl with color impregnated throughout, or a plastisol, or a steel core assembly coated with resilient urethane or vinyl with color impregnated throughout, or integral colored, textured, glass reinforced polyester or injection molded glass filled nylon with vinyl coating or injection molded polyamide with molded in steel attachment brackets.

Material type shall not cause damage to worksurfaces. Outer vinyl surfaces shall have a uniform finish with no exposed seams. Arm color shall match shell color.

Arm style (slated loop or "D" or "T" shall provide adequate elbow rest.

Arms shall be easily installed or removed in the field (on-site).

Fasteners fro the arms shall be hidden from view when the chair is in a normal upright position.

If so specified in the Invitation for Bids, chairs shall be available with adjustable arms. The height range adjustment shall be minimum 2".

22.6. Arm Pads: Arm pads shall be cantilever or "T" shape, with plastic or rubberized or molded flexible vinyl caps over polyurethane foam or textured resilient thermoplastic or injection molded glass filled nylon with a vinyl coating or self skinning urethane foam. Optional fabric caps, matching the fabric on the seat and back, if so specified in the Invitation for Bids, shall be available.

22.7. Base: Chairs shall have a swivel base with a 5-leg "star" design. Base shall be free of sharp edges or protrusions and be equipped with dual wheel casters.

The base shall be high strength, heavy duty cast aluminum alloy, or die formed or welded steel. Arm steel tubing shall be minimum 16 gauge. Alternately, the entire base amy be of solid injection molded ABS (Acrylonitrile Butadiene Styrene) or injection molded, color impregnated glass reinforced nylon (polyamide), thermoplastic with a minimum static load capacity of 3,000 lbs.

Metallic surfaces shall be scuff resistant. Color shall match shell color. An optional chrome or polished aluminum finish, when so specified in the Invitation for Bids shall be available. See Paragraph 5.6.3.

22.8. Casters: Casters shall swivel in a bushing or bearing designed for long life. the shall be hard composition, minimum 2" dual wheels, for use on carpet unless otherwise specified in the Invitation for Bids. They shall be the replaceable stem and socket type, 360 swivel, and not be easily separated from the base.

Note: All casters must comply with 18.3(1) of ANSI/BIFMA X5.1. Perform the soft tread caster test on all chairs. Disregard the hard tread caster test.

22.9. Base Column: Chairs shall be available with optional height adjustment pneumatic cylinder. The cylinder shall be equipped with a heavy duty shock absorber, minimum 7 mil (polyurethane or rubber ring in base of cylinder assembly or heavy duty compression spring in the base tube) to cushion impact with the seat in the lowest height potion. (Example: Suspa #17-4 Series, Stabil U.S.A. #MK3-5 series, or equal, with shock absorber).

The column shall be finished in a monochromatic color matching the outer shell.

22.10. Mechanical/Controls:

22.10.1. All control components for back and seat inclination and seat height adjustment shall be mounted in a heavy duty steel or cast aluminum alloy assembly.

22.10.2. There shall be no design characteristics for mechanical castings or components that will negatively affect appearance, serviceability or that could cause personal injury or damage to clothing. Control mechanism and seat support shall be enclosed in a one piece mar-resistant, non glare thermoplastic shell.

22.10.3. Seat inclination (angle) shall respond to body movement in a rear tilting motion in approximately a 1:2 ratio with the back tilting motion. The total range of the seat tilt shall be minimum 9 . Articulated movement between the seat and backrest is acceptable.

22.10.4. The seat shall be lockable in any position within the inclination range or be stopped from tilting further in any position within the inclination range by utilizing a control or lever on the underside of the seat.

22.10.5. Back reclination shall be easily changeable providing approximately 17 -- 20 back angle change.

Back inclination (angle) shall respond to body movement in a rear tilting motion in approximately a 2:1 ratio with the seat tilting motion.

22.10.6. The back shall be lockable in any position within the inclination rage or the back shall be stopped from tilting further in any position within the inclination range by utilizing a control device on the underside of the seat. Free float action shall also be provided for. The tension on the back tilt of the chair shall e adjustable with a knob (located under the seat pan near the front of the chair mechanism) connected to torsional coil springs by means of an adjustment nut.

22.10.7. Seat height shall be manually adjustable and available with an optional pneumatic adjustment which utilizes a single button or lever located on the underside of the seat. The height adjustment range shall be minimum 4-1/2".

22.10.8. The pneumatic seat height shall be locked in any position within the height adjustment range.

22.10.9. The back cushion height adjustment (if two-piece design) shall lock in multiple positions within the range. The height adjustment range shall be minimum of 2">

22.10.10. All adjustments to seat and back shall be capable of being made while seated.

22.10.11. The devices for operation of seat and back adjustments may, by manufacturers design, be multifunctional (this is not mandatory).

22.11. Swivel: Chairs shall swivel with continuous seat rotation.

23. DESIGN REQUIREMENTS; LOW/NORISE, KNEE TILT (Type 7):

TABLE No. FOUR (4)

DIMENSIONS

(SEE ATTACHMENT No. FOUR)

Type Size Description Overall Height, Fig. 1A Overall Width, Fig. 1B Seat Height, min. Fig. 2A Seat Width, Fig. 2B Seat Depth, Fig. 2A Back Width, Fig. 3B Back Height, Fig. 3A Base Span
7.00 A Low/no rise, Flex Shell, No Arms, Knee Tilt

34-46 19-21

w/arms

22-28
6--0.5 18--22 15--18 16-20 17-24 23--27
7.00 B Low/no rise, Flex Shell, No Arms, Knee Tilt

31-38 18-21 w/arms

22-26

6--0.5 18--22 15--17 16-20 16-19 23--27
  1. Measurements with seat and back in lowest position, with casters.

23.1. Chair Controls: Type 7 Low/No Rise, knee tilt chairs shall have adjustments of seat height and tilt tension. The control shall allow for free flowing dynamic knee tilt action or no front-rise tilt action through a spring mechanism. Back tilt range shall be minimum 0 --15 . Tilt lock shall be included, if it is available.

23.2. Outer Shell: Low/No rise, knee tilt chairs shall have a flexible inner shell which serves a double function as an outer shell. The shell shall be a unitary or "H" shaped, one-piece flexible injection molded, glass reinforced thermoplastic polyester or glass reinforced polyethylene or polypropylene with steel reinforced members.

Or alternatively, the unitary one piece or two piece flexible outer shell may be constructed of injection molded polypropylene or polystyrene with a flexible thermoplastic inner shell.

23.3. Inner Shell: Low/No rise, knee tilt chairs shall have an outer shell which serves a double function as an inner shell (See Paragraph 23.2). The seat and back shall flex independently and shall center and stabilize the user's weight.

Or alternatively, the one piece inner shell of the back and seat may be constructed of a flexible injection molded thermoplastic. The degree of selected tension shall remain constant.

23.4. Seats and Backs: Foam cushions shall be glued or injection molded to the molded contoured thermoplastic base (See Paragraph 5.5.2.).

Type 7 may be constructed of a single piece injection molded polyurethane foam cushion with integral polypropylene mounting frame.

Chairs shall have field (on-site) replaceable cushions.

All back cushion assemblies shall support the lumbar area.

Upholstered back and seat assemblies shall be firmly secured to the outer shell. Upholstery shall be bonded to foam in the contoured areas of the chairs.

Optional upholstered outer backs and seats are unacceptable unless the optional upholstery covers the thermoplastic outer shell or structural shell.

23.5. Arms: All chairs shall be available with arms. Optional arms shall consist of a cast aluminum assembly which is coated with a resilient urethane, electrostatically applied high build epoxy coating to match base and column or coated with a vinyl with color impregnated throughout, or a plastic; or a steel core assembly coated with resilient urethane or vinyl with color impregnated throughout, or integral colored, textured, glass reinforced polyester or injection molded glass filled nylon with vinyl coating or injection molded polyamide with molded in steel attachment brackets.

Material type shall not cause damage to worksurfaces. Outer vinyl surfaces shall have a uniform finish with no exposed seams. Arm color shall match shell color.

Arm style (slanted loop style or "D" shape or "T" shape) shall provide adequate elbow rest.

Arms shall be easily installed or removed in the field (on-site). If chair design incorporates an integral arm construction, removable arms are unnecessary; the arms may be integral with the chair frame or welded to the frame.

Fasteners for the arms shall be hidden from view when the chair is in a normal upright position.

23.6. Arm Pads: Arm pads shall be cantilever or "T" shape, with plastic or rubberized or molded flexible vinyl caps over polyurethane foam or textured resilient thermoplastic or injection molded glass filled nylon with a vinyl coating or self skinning urethane foam. Optional fabric caps, matching the fabric on the seat and back, if so specified in the Invitation for Bids, shall be available.

23.7. Base: Chairs shall have a swivel base with a 5-leg "star" design. Base shall be free of sharp edges or protrusions and be equipped with dual wheel casters.

The base shall be high strength, heavy duty cast aluminum alloy, or die formed or welded steel. Arm steel tubing shall be minimum 16 gauge. Alternately, the entire base may be of solid injection molded ABS (Acrylonitrile Butadiene Styrene) or injection molded, color-impregnated glass reinforced nylon (polyamide), thermoplastic with a minimum static load capacity of 3,000 lbs.

Metallic surfaces shall be scuff resistant. Color shall match shell color. An optional chrome or polished aluminum finish when so specified in the Invitation for Bids, shall be available. See Paragraph 5.6.3.

23.8. Casters: Casters shall swivel in a bushing or bearing designed for long life. They shall be hard composition, minimum 2" dual wheels, for use on carpet unless otherwise specified in the Invitation for Bids. They shall be the replaceable stem and socket type, 360 swivel, and not be easily separated from the base.

Note: All casters must comply with 18.3(1) of ANSI/BIFMA X5.1. Perform the soft tread caster test on all chairs. Disregard the hard thread caster test.

23.9. Base Column: Chairs shall be available with optional height adjustment pneumatic cylinder. The cylinder shall be equipped with a heavy duty shock absorber, minimum 7 mil (polyurethane or rubber ring in base of cylinder assembly or heavy duty compression spring in the base tube) (Example: Suspa #17-4 Series, Stabil U.S.A. #MK3-5 series, or equal, with shock absorber) to cushion impact with the seat in the lowest height position.

The column shall be finished in a monochromatic color matching the outer shell.

23.10. Mechanism/Contorls:

23.10.1. All control components for back and seat inclination and seat height adjustment shall be mounted in a heavy duty steel or cast aluminum alloy assembly.

23.10.2. There shall be no design characteristics for mechanical castings or components that will negatively affect appearance, serviceability or that could cause personal injury or damage to clothing. Control mechanism and seat support shall be enclosed.

23.10.3. Chairs shall have a knee tilt or a no-front-rise tilt mechanism. Mechanism shall be (minimum 1-1/2" diameter) steel spring (s) with adjustable tension control. This mechanism shall be body weight controlled to accommodate work intensive through relaxation types of postures.

23.10.4. Tilt tension shall be changed by adjusting the tension control knob located under the front of the seat and be easy to adjust.

23.10.5. Tilt lock, if available, shall be made by utilizing a lever or knob on the underside at the seat.

23.10.6. Tilt pivot point shall be forward of center of column or behind the fixed forward section to permit seat to recline with minimal rise to the front of seat edge allowing feet to remain flat on the floor.

23.10.7. The knee tilt mechanism shall feature a dwell which provides additional stability and security. The no-front-rise mechanism shall have a tilt tension based on a flat torque curve, so that the tension remains consistent.

23.10.8. For mechanically adjusted chairs, a threaded steel spindle with spring control shall permit a minimum seat height range of 4-1/2". Height shall be adjusted by rotation of upper portion of empty chair. When normal seating pressure is applied to the seat, the mechanism shall disengage, allowing a 360 swivel without affecting seat height. Mechanical height adjustment assembly shall be easily replaced on site.

23.10.9. For pneumatically adjusted chairs, seat height shall be controlled by a lever of stamped steel tubing or a solid steel rod with a plastic handle. Height shall be adjusted by means of a single adjustment lever. When the lever is raised, body weight lowers the chair. When no weight is present and the lever is raised, the seat rises to maximum height. Releasing the lever shall lock the adjustment. Chairs have a minimum 4-1/2" seat height range. Gas cylinders in pneumatic chairs shall be easily replaced on site.

23.11. Swivel: Chairs shall swivel with continuous seat rotation.

ATTACHMENT No. ONE (1)

CERTIFICATE OF COMPLIANCE

Date:

To: Purchaser "N"

Texas Procurement and Support Services

P. O. Box 13186

Austin, TX 78711-3047

Gentlemen:

By my signature below, I hereby certify:

1. that I an officer of my company and am authorized to make this certification;

2. that the information contained herein is true and correct and is provided in accordance with ANSI standard Z 34.2: Self Certification by Producer or Supplier;

3. that records verifying the information contained herein will be made available, upon request, to the Texas Procurement and Support Services of the State of Texas in accordance with the provisions of ANSI Standard Z34.2;

4. that this certification is for the following product manufactured by my company:

Model No: _______________ Description: _______________ Type ________________

5. that the product identified above meets or exceeds all requirements of the following Texas Specification No. 425-06-10B, Chairs, Office, Ergonomic;

6. that the product identified above meets or exceeds all applicable requirements of the following documents as determined by our own testing program or the test results of an independent testing laboratory.

Document Most Recent Test Date Testing Organization
ANXI/BIFMA X5.1.
Test #

Signed: __________________________________________

Title: __________________________________________

Company: __________________________________________

ATTACHMENT No. TWO (2)

COMFORT FIT FORM

Date: _____________________________________________________________________________

Location: __________________________________________________________________________

Manufacturer: ______________________________________________________________________

Series and Model No: ________________________________________________________________

Bidder: ____________________________________________________________________________

Bidder's Address: ____________________________________________________________________

1. FAMILIARIZATION WITH OPERATIONAL INSTRUCTION AND MECHANISMS: Have you been familiarized with the chairs' operation by the instructions and/or Bidder presentations to confidently adjust the chair to support your body? Yes: __________ No: __________

If not, get assistance. Do not begin the Comfort Fit Test until you know how to adjust the chairs.

Note: Team members are to evaluate based on you observation of the characteristics and comfort points enumerated in Paragraph 3.0. through 7.0.

2. RATINGS: Rate (circle your choice) each criteria before moving on to the next criteria. Rating scale: Excellent -- 1; Above Average -- 2; Average -- 3; Below Average --4; Poor -- 5.

3. SEAT HEIGHT ADJUSTMENT:

<Excellent Poor>
3.1. Ease of adjustment 1.00 2.00 3.00 4.00 5.00
3.2. Lever (s) accessibility and proximity. 1.00 2.00 3.00 4.00 5.00
3.3. Comfort of height range. (Allows both feet to be on the floor). 1.00 2.00 3.00 4.00 5.00

4. COMFORT OF SEAT FIT:

<Excellent Poor>
4.1. Soft and warm vs. hard and cold. 1.00 2.00 3.00 4.00 5.00
4.2. Hip cradles evenly vs. ridges that constrict. 1.00 2.00 3.00 4.00 5.00
4.3. Pressure on the Ischial Tuberosities (Two Seat Bones). 1.00 2.00 3.00 4.00 5.00
4.4. Ridges in back or center at tail bone do not bind. 1.00 2.00 3.00 4.00 5.00
4.5. Thigh pressure at point of contact with front lip. 1.00 2.00 3.00 4.00 5.00
4.6. No obstruction to restrict movement of legs under the chair. 1.00 2.00 3.00 4.00 5.00
4.7. Size adequate. 1.00 2.00 3.00 4.00 5.00

5. ARM COMFORT:

<Excellent Poor>
5.1. Height and/or support of forearm. 1.00 2.00 3.00 4.00 5.00
5.2. Access ease under work surface. 1.00 2.00 3.00 4.00 5.00
5.3. Arm fit design. 1.00 2.00 3.00 4.00 5.00
5.4. Field installation and removal ease. 1.00 2.00 3.00 4.00 5.00
5.5. No restriction of thighs caused by arms. 1.00 2.00 3.00 4.00 5.00

6. COMFORT OF BACK FIT:

<Excellent Poor>
6.1. Support at lumbar region (lower back). 1.00 2.00 3.00 4.00 5.00
6.2. Whole back cable support and cushion width. 1.00 2.00 3.00 4.00 5.00
6.3. Top of chair does not create pressure at shoulder blades. 1.00 2.00 3.00 4.00 5.00
6.4. Ease of reaching behind. 1.00 2.00 3.00 4.00 5.00
6.5. Ease of cushion height adjustment. 1.00 2.00 3.00 4.00 5.00

7. BACK TILT and/or SEAT TILT COMFORT:

<Excellent Poor>
7.1. Flexible, adjust to you vs. you adjust to it. 1.00 2.00 3.00 4.00 5.00
7.2. Ease of adjustment. 1.00 2.00 3.00 4.00 5.00
7.3. Lever (s) accessibility and proximity. 1.00 2.00 3.00 4.00 5.00
7.4. Comfort of recline, upright and Data Entry positions. 1.00 2.00 3.00 4.00 5.00
7.5. Feeling of stability and safety. 1.00 2.00 3.00 4.00 5.00
7.6. Dynamic motion chair moves as you move. 1.00 2.00 3.00 4.00 5.00
7.7. No bottom out cushions when you fall into chair. 1.00 2.00 3.00 4.00 5.00
7.8. Holds you erect vs. sliding or fidgeting. 1.00 2.00 3.00 4.00 5.00

8. INITIALS OF EVALUATOR: ____________________________________________________

ATTACHMENT No. THREE (3)

RECOMMENDED TEAM MEMBERSHIP

1. CHAIR EVALUATION CRITERIA: For specific criteria, see Attachment Two (2) which includes the following categories:

1. Seat Height Adjustment

2. Arms (if specified)

3. Comfort of Seat Fit

4. Seat and Back Tilt

5. Comfort of Back Fit

2. TEAM: The evaluation team shall be chosen randomly from five (5) body types, described below.

Type Team Member Approximate Body Height Team Member Approximate Body Weight
A. 6'2" and over 200 lbs. -- 240 lbs.
B. 5'8" -- 6'0" 160 lbs. -- 200 lbs.
C. 5'6" -- 5'8" 145 lbs. -- 180 lbs.
D. 5'3" -- 5'6" 120 lbs. -- 160 lbs.
E. 4'11" -- 5'2" 95 lbs. -- 120 lbs.

ATTACHMENT No. FOUR (4)

Required Plug-ins