1、RR-T-b5OE = 9999974 OLh3L5L 490 I INCH-POUND I RR-T- 650E February 25, 1994 SUPERSEDING September 22, 1988 RR- T - 650D FEDERAL SPECIFICATION TREADS, METALLIC AND NONMETALLIC, SKID-RESISTANT This specification is approved by the Commissioner, Federal Supply Service, General Services Administration,
2、for the use of all Federal agencies, 1. SCOPE AND CLASSIFICATION 1.1 Scope. This specification covers skid-resistant treads made of rubber, vinyl, aluminum alloy, and cast iron. 1.2 Classification. Treads covered by this specification will be of the following compositions and types as specified (see
3、 1.3 and 6.2) Composition A B C Base Material Rubber Vinyl Aluminum Alloy Base D Cast Iron Type 1 2 3 4 5 Design Smooth Designed Ribbed - Lead-Antimony or Aluminum/Oxide-Silicon Carbide Filled Channels Grooved - Lead-Antimony or Aluminum/Oxide-Silicon Carbide Filled Channe 1 s Abrasive Surface Benef
4、icial comments (recommendations, additions, deletions) and any pertinent) data which may be of use in improving this document should be addressed to: I Il000 23rd Avenue, Port Hueneme, CA 93043-4301, by using the Standardization I IDocument Improvement Proposal (DD Form 1426) appearing at the end of
5、 this 1 Commanding Officer (Code 156), Naval Construction Battalion Center, I document or by letter. I AMSC N/A FSC 5670 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
6、-,-RR-T-650E W 9999974 OLb3L52 327 W RR-T-650E O 1.3 Combination of classification. Table I shows the available combinations of classifications. TABLE I. Available combinations I I I Type I I Composition I I 1 2 3 4 51 I I I A X X X -I I X -I I X X XI I XI I I D B C I I Note: X designates available
7、combinations. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications. standards. and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those list
8、ed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). Federal Specification PPP-B-636 - Boxes, Shipping, Fiberboard Federal Standard FED-STD-123 - Marking for Shipment (Civil Agencies) Military Specifi
9、cation MIL-P-116 - Preservation, Methods of Military Standards MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 - Marking for Shipment and Storage MIL-STD-2073-1 - DOD Materiel Procedures for Development and Application Attributes of Packaging Requirements (Unless otherwise
10、 indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS
11、-,-,-4 RR-T-b5OE m 9999974 0163153 2b3 m RR-T-650E 2.2 Other publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. O ASTM A 48 - Gray Iron Castings ASTM B 26 - Aluminum-Alloy Sand
12、 Castings ASTM B 209 - Aluminum and Aluminum-Alloy Sheet and Plate ASTM B 221 - Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, ASTM D 2240 - Rubber Property - Durometer Hardness ASTM D 3951 - Commercial Packaging Shapes, and Tubes (Application for copies should be addressed to ASTM, 1916 Rac
13、e Street, Philadelphia, PA 19103.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the
14、event of a conflict between the text of this document and the references cited herein (except for associated detail specifications, specification sheets or MS standards), the text of this specification takes precedence. Nothing in this specification, however, supersedes applicable laws and regulatio
15、ns unless a specific exemption has been obtained . 3. REQUIREMENTS O 3.1 First article. When a first article is specified (see 6.2), the contractor shall furnish a skid-resistant tread of the same classification ordered for first article inspection and approval (see 4.2.1 and 6.3). 3.2 Standard comm
16、ercial product. The skid-resistant tread shall, as a minimum, be in accordance with the requirements of this specification and shall be the manufacturers standard commercial product. Additional or better features which are not specifically prohibited by this specification but which are a part of the
17、 manufacturers standard commercial product, shall be included in the skid-resistant tread being furnished. A standard commercial product is a product which has been sold or is being currently offered for sale on the commercial market through advertisements or manufacturers catalogs, or brochures, an
18、d represents the latest production model. 3.3 Materials. Materials used shall be free from defects which would adversely affect the performance or maintainability of individual components or of the overall assembly. Materials not specified herein shall be of the same quality used for the intended pu
19、rpose in commercial practice. Unless otherwise specified herein, all equipment, material, and articles incorporated in the work covered by this specification are to be new and fabricated using materials produced from recovered materials to the maximum extent possible without jeopardizing the intende
20、d use. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. Unless O 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
21、IHS-,-,-RR-T-650E = 9999974 0363154 LTT RR-T-650E c otherwise specified, none of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification. 3.3.1 Composition A - rubber base. Rubber base treads shall be made from synthetic rubber with a mixtu
22、re of synthetic and reclaimed rubber. in accordance with 4.5, the durometer reading shall be 90 55. When tested 3.3.2 Composition B - vinyl base. Vinyl base treads shall be made from suitably compounded virgin polymer or copolymer of vinyl chloride resin, plasticized with phosphate or phthalate este
23、r plasticizers only. shall be uniform, free from fiber and objectionable odor. Virgin polymer shall be defined as a polymer or copolymer that has not been processed into a finished product prior to use in the specified manner. The compound 3.3.3 Composition C - aluminum, alloy base. The aluminum all
24、oy tread base shall be either aluminum conforming to ASTM B 221, alloy 6063; ASTM B 209, alloy 3003 F temper; or cast aluminum alloy conforming to ASTM B 26, alloy B443.0-F, alloy 2950-T4, or alloy B514.0-F. 3.3.4 Composition D - cast iron. The tread base shall be gray iron conforming to ASTM A 48.
25、3.4 Design. All tread designs shall have anti-slip properties. 3.4.1 Rubber base design. The upper surface of tread shall be either type 1 (smooth and flat), or type 2 (designed), as specified (see 6.2). 3.4.1.1 Abrasive strips for design - type 1 and 2. When specified (see 6.2), two mineral-coated
26、abrasive grit strips, each strip not less than 3/4 inch (19 millimeters (mm) nor more than 1 inch (25 mm) wide and not less than 0.030 inch (0.76 mm) thick, shall be recessed into and adhered to the top surface of the tread portion to form a continuous flat surface overall. Each strip shall run the
27、full length of the treads, and shall be parallel to each other. The front edge of the first strip shall be no closer than 3/4 inch (19 mm) to the front of the tread. The second strip shall be approximately 3/4 to 1-1/2 inches (19 to 38 mm) from the first strip. 3.4.1.2 Design for access bv the visua
28、llv impaired type 1 and 2. When specified (see 6.2), one mineral coated abrasive grit strip, not less than 2 inches (51 mm) nor more than 3 inches (76 mm) wide and not less than 0.030 inch (0.76 mm) thick shall be recessed into and adhered to the top surface of a tread portion to form a continuous f
29、lat surface overall. Each strip shall run the full length of the treads. 3/4 inch (19 mm) to the front of the tread. The strip shall be of a clearly contrasting color to the color of the rubber stair tread. The front edge of the strip shall be no closer than 3.4.2 Vinyl base design. - The upper surf
30、ace of tread shall be type 2. 3.4.3 Aluminum alloy tread design. Base shall be of aluminum conforming to section 3.3.3. Abrasive filler shall be lead-antimony alloy or aluminum oxide-silicon carbide mixture, as specified (see 6.2). Lead-antimony alloy shall be 97.0 to 98.0 percent lead and 2.0 to 3.
31、0 percent antimony. Aluminum oxide-silicon carbide mixture shall be bound together with a waterproof binder, Unless otherwise specified (see 6.2), abrasive filler shall be black. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4 RR-T-b50E 9999974 0
32、163155 O36 RR-T-650E 3.4.4 Cast iron tread design. The tread shall be sand finish casting with the exposed wearing surface containing an abrasive material embedded in the top metal surface not less than 1/16 inch (1.6 mm). Size of non-slip granules shall range from No. 16 to No. 24. Granules shall b
33、e distributed uniformly over the tread surface. e 3.4.5 Type 1 - non-designed - smooth top. The tread surface shall be smooth and flat, with good wear, and shall be skid-resistant. Available on rubber base tread only. 3.4.6 Type 2 - designed. When the surface is designed, the upper surface of the tr
34、ead portion shall be of commercial design. be not greater than 50 percent of the overall thickness of the tread. The tread design shall be formed to provide wear surface and skid-resistant properties. The depth of the design shall 3.4.7 Tvpe 3 - ribbed - filled channels. Channels shall be filled wit
35、h abrasive filler conforming to 3.4.3. Exposed edges of the ribs shall be leveled. 3.4.8 Type 4 - grooved - filled channels. Channels shall be filled with abrasive filler conforming to 3.4.3. Exposed edges of the ribs shall be leveled. Grooves shall be free of dirt-retaining pits or obstructions whi
36、ch could retain dirt or moisture. 3.4.9 TvDe 5 - abrasive surface - embedded. The exposed wearing surface shall contain an abrasive material embedded in the top metal surface not less than 1/16 inch (1.6 mm). Size of skid-resistant granules shall range from No. 16 to No. 24. Granules shall be distri
37、buted uniformly over the tread O surface. 3.5 Nosing style. Nosing style shall be as specified (see 6.2). 3.5.1 Americans with Disabilities Act (ADA) requirements. When specified, (see 6.2), stair tread type 1 and 2 rubber base shall have adjustable noses capable of covering all angles between 60 an
38、d 90 degrees. 3.6 Tread backs. Tread backs shall be as specified (see 6.2 and 6.4). Composition A tread backs shall have a minimum of 80 percent of the back sanded by the manufacturer to assure proper adhesion. 3.7 Predrilled. When holes are required (see 6.2), holes for treads shall be drilled eith
39、er by the receiving activity to meet job conditions, or by the manufacturer, as specified (see 6.2). Unless otherwise specified see 6.2), holes drilled by the manufacturer shall be of the manufacturers standard hole pattern and size. 3.8 Anchors. When specified (see 6.2), anchors shall be of the man
40、ufacturers standard design. 3.9 Dimensions. 3.9.1 Dimensions of rubber and vinyl base treads. Rubber and vinyl base tread dimensions shall be as specified (see 6.2). The nominal size shall be the actual width and length of the tread portion. O 5 Provided by IHSNot for ResaleNo reproduction or networ
41、king permitted without license from IHS-,-,-RR-T-650E 7979974 0363356 T72 L RR-T-650E O 3.9.1.1 Thickness for rubber base treads. Unless otherwise specified (see 6.2), rubber base treads shall not be less than 3/16 inch (4.76 nun) thick at the nose and 1/8 inch (3 mm) overall. When determining the m
42、inimum thickness, the overall thickness of the material shall be measured. The recessed part of a type 2 stair tread shall not be utilized when determining thickness of the material. 3.9.1.2 Thickness for vinyl base treads. Unless otherwise specified (see 6.2), vinyl base treads shall not be less th
43、an 1/8 inch (3 mm) thick at the nose and 3/32 inch (2 mm) overall. When determining the minimum thickness, the overall thickness of the material shall be measured. The recessed part of type 2 stair tread shall not be utilized when determining thickness of the material. 3.9.2 Dimensions of aluminum b
44、ase treads. Aluminum base tread dimensions shall be as specified (see 6.2). The nominal size shall be the actual width and length of the tread portion. 3.9.2.1 Thickness for aluminum base treads. Unless otherwise specified (see 6.2), aluminum base treads shall be not less than l/4-inch (6.35 mm) thi
45、ck. When determining the minimum thickness, the overall thickness of the material shall be measured. The recessed part of the non-skid pattern shall not be utilized when determining minimum thickness of the material. 3.9.3 Tolerances. Tolerances for length and width shall be +1/8 inch (23 mm). Thick
46、ness tolerance shall be 21/32 inch (20.7 nun). Except for composition A, treads shall not be restricted to a minimum length tolerance, Most composition A treads are intentionally manufactured longer than the required length, allowing for better fitting during installation. 3.10 Interchangeability. A
47、ll skid-resistant treads of the same classification furnished with similar options under a specific contract shall be identical to the extent necessary to insure interchangeability of component parts, assemblies, accessories, and spare parts. 3.11 Workmanship. 3.11.1 Metal fabrication. The metal use
48、d in fabrication shall be free from kinks, sharp bends, and other conditions which would be deleterious to the finished product. Manufacturing processes shall not reduce the strength of the metal to a value less than intended by the design. Manufacturing processes shall be done neatly and accurately
49、. All bends shall be made by controlled means to ensure uniformity of size and shape. 3.11.2 CastinPs. All castings shall be sound and free from patching, misplaced coring, warping, or any other defect which reduces the castings ability to perform its intended function. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (e
