Texas Specification No. 420-24-01C
Effective Date: November 1, 1990
Last Revision: June 28, 1996
CHAIRS, STEEL, FOLDING
1. SCOPE: This specification establishes the minimum requirements for four (4) types of steel folding chairs for use as temporary seating.
2. APPLICABLE SPECIFICATIONS AND STANDARDS: References to specifications, standards, test materials, and other documents that are in effect on the date of the Invitation for Bids are applicable. Copies of the referenced documents are available from the issuing organizations at the addresses shown. The following publications are 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 A208.1-89 -- Particleboard, Mat-formed Wood.
2.1.2. ANSI/HPMA HP-83 -- Hardwood and Decorative Plywood.
2.2. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM), 1916 Race Street, Philadelphia, PA 19103:
2.2.1. ASTM D 1037 -- Method for Evaluating Properties of Wood-base Fiber and Particle Panel Materials.
2.2.2. ASTM D 3574 -- Method of Testing Flexible Cellular Materials: Slab, Bonded, and Molded Urethane Foams.
2.2.3. ASTM D 4157 -- Method for Abrasion Resistance of Textile Fabrics (Oscillatory Cylinder Method).
2.3. FEDERAL SPECIFICATIONS: Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402:
2.3.1. AA-C-291F -- Chairs, Folding, (Steel).
2.3.2. CCC-A-680A -- Artificial Leather (Cloth Coated), Vinyl Resin, Expanded Layer, (Upholstery).
2.3.3. CCC-C-700J -- Cloth, Coated, Vinyl Coated (Artificial Leather).
2.3.4. LLL-B-810B -- Building Board (Hardboard) Hard Pressed Vegetable Fiber.
2.3.5. TT-C-490C -- Cleaning Methods for Ferrous Surfaces and Pretreatments for Organic Coatings.
2.4. IRON AND STEEL SOCIETY (ISS), 410 Commonwealth Drive, Warrendale, PA 15086:
2.4.1. Sheet Steel Manual.
2.5. NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATIONS (NEMA), 2101 L Street, Northwest, Washington, DC 20037:
2.5.1. LD3-1985 -- High Pressure Decorative Laminate.
2.6. STATE OF CALIFORNIA, DEPARTMENT OF CONSUMER AFFAIRS, BUREAU OF HOME FURNISHINGS AND THERMAL INSULATION, 3485 Orange Grove Avenue, North Highlands, CA 95660:
2.6.1. Technical Bulletin 117.
3. CLASSIFICATION: Steel folding chairs shall be classified by type and style as follows:
3.1.1. Type 1: Metal Seat and Metal Back.
3.1.2. Type 2: Padded Metal Seat and Metal Back.
3.1.3. Type 3: Padded Metal Seat and Padded Metal Back.
3.1.4. Type 4: Padded Wooden Seat and Padded Metal Back.
3.2.1. Style 1: Riveted or Welded Leg Braces: one (1) in front and one (1) in back.
3.2.2. Style 2: All Welded and/or Brazed Leg Braces: one (1) in front and two (2) in back; or Double Riveted U-Brackes: one (1) in front and one (1) in back.
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, industry standards, and/or accepted trade practices. Where variant meanings may exist, the applicable interpretations shall be determined by the Texas Procurement and Support Services (TPASS).
4.1. Commercial Quality: Commercial quality shall be as defined in the "Sheet Steel Manual."
4.2. Commission: Texas Procurement and Support Services.
4.3. Normal Use: Use which can be reasonably expected in an area in which seating is used during a standard forty (40) hour work week. Normal use shall include incidental bumps and scrapes which can occur while being used as seating and during the setting up and the taking down, transportation, stacking and compact storage of seating.
4.4. High Pressure Laminate (HPL): Multiple layers of resin impregnated paper fused under heat and pressure to result in a rigid covering media (minimum 0.040 inches thick).
4.5. Stretcher Level Standard of Flatness: Flatness shall be as defined in the "Sheet Steel Manual."
4.6. Wood-base Particleboard: A panel manufactured from wood in the form of discrete particles, combined with a synthetic resin or other suitable binder and bonded together under heat and pressure.
5. REQUIREMENTS: Products furnished under this specification shall meet or exceed the following requirements:
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 inside and outside and shall be free of all imperfections and/or defects which might affect appearance, normal life, or serviceability.
5.1.3. Chairs shall be furnished completely assembled and ready for use.
5.1.4. Details not specified herein shall be in accordance with the best commercial practices for products of this type.
5.2. Colors: The colors of the chair finish and upholstery (if required) shall be selected for the manufacturer's standard colors.
5.2.1. When so specified in the Invitation for Bids, the color shall be one of the following listed in Table 1. The colors shall match those shown in the Texas Color Charts for Steel Furniture.
|Color Name||Color Code No.|
5.3. Dimensions: Dimensions shall be as shown in Table 2.
|Description||Minimum in inches||Maximum in inches|
|Seat Height, from floor||16.5||18.0|
|Back Rest Height||6.0||9.0|
|Height of Frame||29.25||32.0|
|Width of Frame||17.75||19.0|
|Depth of Seat||15.0||16.5|
|Width of Seat||15.5||16.5|
|Height of Frame||36.0||41.0|
|Width of Chair||17.5||19.0|
5.4.1. The structural design of the chairs shall be such that any sustained and impact weight will be uniformly distributed on all supporting parts with no excessive stain on any one supporting part under normal use.
5.4.2. The folding mechanism shall be designed to guard against personal injury and snagging or tearing of clothing. Chairs shall fold smoothly and quietly.
5.4.3. The design shall be such that one person can easily fold and unfold the chair.
5.4.4. The chair shall not exhibit permanent distortion greater than five-sixteenths inch (5/16") when tested in accordance with Paragraph 6.
5.4.5. Hinge points required to accomplish folding shall be sturdily constructed and free of appreciable wear or deformation after repeated use of the chair.
5.4.6. Chairs shall not collapse due to normal movement when in use by the occupant.
5.5. Materials: The materials used in the construction of the chairs shall conform to the requirements stated herein.
5.5.1. Steel: The steel sheet used in the fabrication of the chairs shall be "commercial quality" cold rolled steel. The steel sheet used for all exposed parts shall have a "stretcher leveled standard of flatness" as defined in the applicable section of the Sheet Steel Manual.
All steel tubing shall be either seamless or continuous seam welded. The thickness of steel used for individual parts shall be as specified and are minimum thicknesses permitted subject to the tolerance given in the Sheet Steel Manual. The steel sheet and tubing shall be smooth, free of rust, scale, pits, scratches, laps, crimps, and buckles.
5.5.2. Padding Material: The padding material used in Types 2, 3 and 4 chairs shall be one-hundred percent (100%) polyurethane foam of minimum density of two-and-one-fourth pounds (2-1/4 lbs.) per cubic foot. The foam material shall have a twenty-five percent (25%) minimum indentation force deflection (IFD) of twenty-five (25), when tested in accordance with ASTM D 3574. The material shall be flame retardant, Class 1, in accordance with California Technical Bulletin No. 117.
The material shall be one piece, and securely bonded to the base. For Types 2 and 3 chairs, the seat pad shall be not less than one inch (1") thick and not less than one-half inch (1/2") thick for back pads. For Type 4 chairs, the seat pad shall be a minimum of two inches (2") thick, and the backrest shall be a minimum of one inch (1") thick.
5.5.3. Vinyl Upholstery Material: The upholstery for Types 2, 3, and 4 chairs shall have a minimum weight of twenty-seven ounces (27 oz.) per linear yard for non-expanded support vinyl, or thirty-four ounces (34 oz.) per linear yard for expanded supported vinyl and shall meet or exceed the applicable requirements of Federal Specifications CCC-C-700 and CCC-A-680.
The material shall be flame resistant, meeting the requirements of California Technical Bulletin No. 117, Class 1.
The finish or grain shall be smooth or simulate top-grain leather. The colors shall coordinate as closely as possible with the chair frame.
5.5.4. Nylon Upholstery Material: One-hundred percent (100%) nylon fabric with a minimum weight of thirteen-point-two ounces (13.2 oz.) per linear yard, or equal shall be provided. The color shall match as closely as possible to the chair frame.
The material shall be abrasion resistant, exceeding 50,000 double rubs on the Wyzenbeek test (ASTM D 4157), and shall be flame resistant, meeting the requirements of California Technical Bulletin No. 117, Class 1.
5.5.5. Olefin Upholstery Material: When so specified in the Invitation for Bids, one-hundred percent (100%) "Marquesa Lana" fabric shall be provided. The fabric shall be abrasion resistant, exceeding 250,000 double rubs on the Wyzenbeek test (ASTM D 4157), and shall be flame resistant, meeting the requirements of California Technical Bulletin No. 117, Class 1.
5.5.6. Fasteners: Bolts, nuts, screws, rivets and other fastening devices used in chair construction shall be made of corrosion resistant material or shall be protected for corrosion by the pint on the finished chair.
5.5.7. Plywood: Plywood used for seats shall have a maximum moisture content between six percent (6%) and nine percent (9%) and meet the requirements of Federal Specification AA-C-291 and ANSI/HPMA HP. Plywood shall be a minimum seven-sixteenth inch (7/16") panel five-ply (5-ply).
5.5.8. Particleboard: Particleboard used for seats shall be high density. It shall be a minimum of five-eighths inch (5/8") panel three-ply (3-ply), warpage, abrasion and moisture resistant. Maximum moisture content shall be nine percent (9%). Minimum density shall be thirty-five pounds (35 lbs.) per cubic foot.
5.5.9. Tablet Arm Laminate: Tops shall be standard with high pressure plastic laminate meeting NEMA LD3 specifications, or manufacturer's standard polyplastic resin. The laminate shall be of a uniform quality, free from blisters, wrinkles, cracks, scratches, dent marks, heat marks or other defects. The laminate shall be 0.040 inch thick, minimum. The top surface shall have a non-glare or matte finish.
5.6. Finish: All painted surfaces shall be thoroughly cleaned and free of dirt, oil, grease, moisture, or other foreign material prior to painting. The cleaning and priming of the surfaces shall conform to one (1) of the methods of Federal Specification TT-C-490. at the manufacturer's option.
5.6.1. Finish Coat: After cleaning, all metal surfaces shall be dipped or sprayed with a suitable primer coat that is compatible with the top or finish coat. The finish coat shall consist of a baked enamel coating applied and baked in accordance with the enamel manufacturer's recommendations, or the manufacturer's standard epoxy based coating of comparable quality. The enamel shall be a non-chipping type. There shall be no indication of rust or decay under the coating.
5.7.1. All brazing, riveting, and welding shall assure rigid joints in proper alignment.
5.7.2. Welds shall be sound, without porosity, and shall provide rigid, one piece units. All exposed welds shall be free of burrs and sharp edges.
5.7.3. The padded seat and backrest assembly shall be securely attached and shall not loosen under continued use. The upholstery fasteners shall not be exposed. The seat and back upholstered assemblies shall match in construction, design, and color unless otherwise specified in the Invitations for Bids.
5.8. Components: The folding chairs shall be constructed as specified herein.
5.8.1. Main Frame: The frame shall be a one piece and made form U-shaped, minimum nineteen (19) gauge tubular steel of a minimum outside diameter of seven-eighth inch (7/8"). Frames shall be seam welded. The frame shall be reinforced at pivot points with frame strengtheners.
5.8.2. Back Legs: The back legs shall be made of minimum twenty-two (22) gauge (Style 1) or minimum twenty (20) gauge (Style 2) cold rolled tubular steel with a minimum outside diameter of seven-eighth inch (7/8").
5.8.3. Chair Back: The back shall be fabricated from a single piece of minimum twenty-four (24) gauge sheet steel and shall be contoured for maximum comfort. All edges shall be formed to provide maximum strength. There shall be no sharp edges.
The Type 3 and 4 chairs shall be furnished with an upholstered back rest assembly consisting of support panel, padding, and upholstery secured to the backrest with screws.
5.8.4. Chair Seat: Metal seat shall be welded from a single piece of minimum twenty-one (21) gauge sheet steel and shall be formed in such a manner so as to provide strength and rigidity as well as maximum comfort.
The steel seat pans of Types 2 and 3 chairs shall be furnished with upholstered seat assemblies consisting of support panel, padding, and upholstery.
Type 4 shall have a non-warping minimum five-ply (5-ply) plywood seat or minimum three-ply (3-ply) particleboard seat with rounded front corners, and housed in a minimum eighteen (18) gauge steel frame. Polyfoam shall be securely bonded to base. Seat cushions shall be replaceable.
5.8.5. Cushions: When so specified in the Invitation for Bids, replaceable seat and backrest cushions, that fasten tot he frame with screws, shall be provided. (Replaceable seat cushions are standard for Type 4 chairs.)
5.8.6. Seat and Back Padding Support: The seat and back padding (Type 2, 3, and 4) shall be supported by a panel, backboard, of sufficient strength, thickness, and density to hold the padding securely in place on the seat and back. Hardboard or fiberboard used shall be a minimum of three-sixteenths inch (3/16") thick and be a minimum of Type 3 of Federal Specification LLL-B-810.
5.8.7. Leg Braces: Both the main frame and the leg braces shall be minimum twenty (20) gauge tubular steel with a minimum diameter of five-eights inch. (5/8").
188.8.131.52. Style 1 chairs shall have one (1) brace in front, one (1) in back, minimum. The braces shall e securely riveted and/or welded to each leg to provide rigidity to the chair.
184.108.40.206. Style 2, two (2) back braces (double rear crossbrace), shall be provided will all welded construction on leg braces and chair backs. These braces shall be securely welded between the main frame and between the back legs to provide rigidity to the chair. Double riveted U-braces are also acceptable. Rivets shall be of the solid type.
5.8.8. Shoes: The four (4) chair legs shall be provided with replaceable shoes made of linear polyethylene or good quality resilient material. The shoes shall fit snugly, shall not mar floor, and shall be resistant to sliding and loosening.
5.8.9. Ganging: When so specified in the Invitation for Bids, fastening devices shall be furnished which will hold the chairs together in groups of two, three or four (2, 3, or 4) chairs. The devices shall be designed to fit the chairs furnished. The clamping devices shall hold the chairs together in a rigid and secure manner and shall not hinder easy folding or storage of the chairs. No special tools shall be required for attachment if a separate device is furnished. The fastening devices shall be free from rough edges or protruding parts that might snag clothing or cause injury.
5.8.10. Folding Bookrack: When so specified in the Invitation for Bids, factory installed bookracks shall be furnished. The bookrack shall be free from rough edges or protruding parts that might snag clothing or cause injury. The wire frame shall be a minimum five-eights inch (5/8") outer diameter steel.
5.8.11. Fold-down Tablet Arms: When so specified in the Invitation for Bids, fold-down table arms shall be furnished with a right hand table arm, unless left hand table arm is specified. The shape of the tablet arm shall be the option of the manufacturer; however, it shall be approximately three-hundred-fifty (350) square inches. Tablet arm tops of particleboard shall be minimum fifty-five pound (55 lbs.) density, as determined by ASTM D 1037. tops may be resin core or plywood. The thickness shall be 0.6435 ± 0.0246 inches. The edges shall be shaped and rounded and the corners shall be rounded. When in the "up" position the entire tablet arm shall be sloped and positioned to provide maximum comfort for the user. It shall be securely fastened to the arms support or supports and shall not loosen under normal use.
Particleboard or plywood core tablet arms shall have a laminated construction consisting of high pressure laminate decorative plastic writing surface (face sheet), a core of plywood or particleboard, and a plastic backing sheet (See Paragraph 5.5.9.).
5.9. Options: Options shall be as specified: Color (See Paragraph 5.2.); Fabric (See Paragraphs 5.5.3. through 5.5.5.); Replacement Seat Cushions (See Paragraph 5.8.5.); Leg Braces (See Paragraph 5.8.7.); Ganging (See Paragraph 5.8.9.); Bookracks (See Paragraph 5.8.10.); and Fold-down tablet arms (See Paragraph 5.8.11.).
5.10. Vendor Requirements: Bidder shall be responsible for furnishing to each using agency a color chart showing the manufacturer's standard colors.
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. Chairs shall be tested by the following or approved equally applicable procedures:
6.1. Vertical Impact Test: Federal Specification AA-C-291: The chair shall be subject to the impact of a forty pound (40 lbs.) sandbag, approximately nine-and-one-half inches (-1/2") in diameter, dropped from a height of ten to twelve inches (10"--12"). There shall be no weld failures, cracks, or fractures of any metal part of the chair.
7. SAMPLES: Unless otherwise specified in the Invitation for Bids, no prepurchase samples shall be required. Samples tested 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 one (1) year. 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. Warranty shall include materials and labor.
9.1. Guarantee: The vendor shall guarantee that the chairs will be a standard and continuing item in the manufacturer's product line as specified in the Invitation for Bids. The chairs shall be identifiable by regular catalog 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.
11. INSTRUCTION BOOKS and/or MANUALS: The vendor shall furnish one (1) copy of any required operating and/or maintenance instructions for each case delivered. The instructions shall accompany the chairs 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.
12.1. Delivery: when so specified in the Invitation for Bids, delivery techniques shall be as follows:
12.1.1. Agency receiving dock.
12.1.2. Inside delivery, non-installed.
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 ordered.
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 conditions:
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: Bidder shall provide a line item by line item written answer to all technical specifications of Paragraph 5. Failure to submit a line answer at time of bid opening will result in disqualification of the bid.
16. ORDERING DATA: When ordering products conforming to this specification the requisitioning agency shall specify the following:
16.1. The number of this specification (420-24-01C).
16.2. Type (See Paragraph 3.1.).
16.3. Style (See Paragraph 3.2.).
16.4. Color (See Paragraph 5.2.).
16.5. Upholstery (See Paragraph 5.5.3., 5.5.4., and 5.5.5.).
16.6. Options (See Paragraph 5.9.).
16.7. Delivery (See Paragraph 12.1).
16.8. Quantity of each required.
17. AVAILABILITY OF SPECIFICATIONS: Copies of this specification may be obtained by calling or writing:
Texas Procurement and Support Services
Austin, TX 78711-3047