1、 Beneficial comments (recommendations, additions, deletions) and any pertinentdata which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 3112, Departmen of the Navy, Washington, DC 20362 by- using the self-addressed Standardi- zation Documen
2、t Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. 10 December 1981 SUPERSEDING MIL-S-29180(NAVY) 16 February 1979 MILITARY SPECIFICATION SCAFFOLDING COMPONENTS,. STEEL (PIPE, TUBE, AND COUPLER) This specification i5 approved for use by the Naval Sea Systems Co
3、mmand, Department of the Navy, and i5 available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers steel pipe, tube, and coupler scaffolding components including pipe, tubing, couplers, and associated fittings. 1.2 Classification. Pipe
4、, tube and coupler scaffolding components shall be of the following components, sizes, lengths, types, and styles as specified (see 6.2 and 6.5): Component I - Right angle coupler Size 2 b*y 2-inch. Size 2-1/2 by 2-inch. Size 2-1/2 by 2-1/2-inch. Component II - Swivel coupler. Size 2 by 2 inch. Size
5、 2-1/2 by 2-inch. Size 2-1/2 by 2-1/2-inch. Component III - Twist lock fitting. Size 2-inch tubing. Size 2-inch pipe. Size 2-1/2-inch pipe. Type - male. Type - female. r I FSC 5440 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- . L - _ MIL-S-ZSLBOA
6、 59 W 9749906 02L5712 B m MIL-S-29180A(NAVY) Component IV - Pipe and tubing. Size 2-inch tubing. Size 2-inch pipe, Size 2-1/2-inch pipe. Length - 6 feet. Length - 8 feet. Length - 10 feet, Length - 13 feet, Type - with twist lock fitting. Type - without twist lock fitting, Component V - Floor plate.
7、 Size 2-inch tubing, Size 2-inch pipe , Size 2-1/2-inch pipe. Type - with twist lock fitting. Type - with female cylinder. Component VI - Canter. Size 2-inch tubing. Size 2-inch pipe, Size 2-1/2-inch pipe. Type - with twist lock fitting. Type - with female cylinder. Style - with rubber wheels. Style
8、 - with steel wheels. 2, APPLICABLE DOCUMENTS 2.1 Government documenta. 2*1,1 Specifications and standards. Unless otherwise specified, the following specifications and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standarda (DoDISS) specified i
9、n the solicitation form a part of thi8 specification to the extent apecified herein, SPECIFICATIONS FEDERAL QQ-S-781 - Strapping, Steel, and Seals, PPP-B-601 - Boxe8, Wood, Cleated-Plywood. PPP-B-621 - Boxes* Wood, Nailed and Lock Corner. PPP-B-636 - Boxea, Shipping, Fiberboard. 2 Provided by IHSNot
10、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-271BOA 54 M 7777706 0215713 T M o STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inapection MIL-STD-129 - Marking for Shipment and Storage. by Attributes. (Copies of specifications and standard
11、s required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. The issues of t
12、he documents which are indicated as DQD adopted shall be the issue listed in the current = DoDISS and the supplement thereto, if applicable. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ISO/R261 - IS0 Metric Screw Threads, General Plan, 0.25 to 300 mm. (Application for copies should be addressed to
13、the American National Standards Institute, 1430 Broadway, New York, NY 10018.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 36 - Structural Steel. (DoD adopted) A Li7 - Malleable Iron Castings. (DoD adopted) A 120 - Pipe Steel Black and Hot-Dipped Zinc Coated (Galvanized) A 123 - Zinc (Hot Ga
14、lvanized) Coatings on Products Fabricated Welded and Seamless, for Ordinary Uses. (DQD adopted) from Rolled, Pressed, and Forged Steel Shapes, Plates, Bars and Strip. (DoD.adopted) ware. (DoD adopted) A 153 - Zinc Coating (Hot Dip) on Iron and Steel Hard- A 370, Sup III - Mechanical Testing of Steel
15、 Products, Methods A 449 - Quenched and Tempered Steel Bolts and Studs. (DQD adopted) A 501 - Ht-Tormeil Welded and S-eamless Carbon Steel Structural A 563 - Carbon and Alloy Steel Nuts. (DQD adopted) A 668 - Steel Forgings, Carbon and Alloy, for General Industrial and Definitions for. (DoD adopted-
16、) Tubing, Use. (DQD adopted) (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) AMERICAN WELDING SOCIETY, INC. (AWS) D1.l - Structural Welding Code. (Application for copies should be addressed to the American Weld
17、ing Society, Inc., 2501 N.W. 7th Street, Miami, FL 33125,) NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freight Classification. (Application for copies should be addressed to the National Motor Freight Traffic Association, Inc., ATA Traffic Department, 1616 P Street, N.W.,
18、Washington, DC 20036.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-UNIFORM FREIGHT CLASSIFICATION RATINGS, RULES AND REGULATIONS Uniform Freight Classification. (Application for copies should be addressed to the Uniform Classifi- cation Committee
19、, Agent Tariff Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Indutrtry association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 2.3 Order of_precedenc
20、e. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3*1 Descriution. Pipe, tube,and coupler scaffolding components are the fundaminta1 building units of engineered scaffold structu
21、res (see 6.1). - 3.2 First article. When specified (see 6.21, scaffolding components of the typ-gth, and size shall be subjected to first article inspection (see 4.3 and 6.4). 3,3 S-tandard commercial produ.ct. Each scaffolding component of the same olasslfication shall, as a minimum, be in accordan
22、ce with the requirements specified herein and may 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 manufacturers atandard commercial product, shall be included in the unit e being f
23、urnished. 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, and represents the latest production model. 3.4 Materials. Materials used shall be free from defect
24、s which would adversely affect the performance or maintainability of individual component8 or of the overall assembly. Materials not specified herein shall be of the same quality used for the intended purpose in commercial practice. Unleae otherwise specified herein, all equipment, material, and art
25、icles 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 intended use. The term “recovered materials means materials which have been collected or recovered from
26、solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products are allowed under thin specification unless otherwise specified. 3.5 Interchangeable items. All scaffolding com
27、ponents of the same clanaificaiion, furnished under any specific contract, shall be physically and mechanically interchangeable. This requirement includes parts, asaemblien, components, and accessories. No deviation will be acceptable. 3.6 Right angle coupler. The right angle coupler ahall have two
28、drop.forged capa, a drop forged one piece body, and a securing bolt for each cap. Forgings shall conform to ASTM A 668. Body and caps shall be Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-291BOA 54 m 9797906 0215715 3 0 Contoured to fit the
29、outside diameter of the applicable pipe or tubing size. Coupler bodies shall be 4 inches + 1/4 inch wide for 2-inch pipe or tubing and 4-1/2 inches + 1/4 inch wide Tor 2-1/2-inch pipe. Each cap shall hinge on an anneald steel pin and shall be provided with an opening to receive the bolt Without remo
30、ving the nut. The cap shall be designed so as to swing from fully closed to fully open in an approximate arc of 90 degrees. A hinge stop shall be incorporated to maintain this 90 degree angle for the fully open position. The cap shall also be provided with a minimum 1/16-inch lip to prevent the bolt
31、 from slipping out of the opening after tightening. The two bolts shall meet the requirements of 3.13.2.1 and shall be either 1/2-13 NC-2A or Ml4 captive bolts capable of movement only in a radial plane into and out of the cap opening for assembly or disassembly. Nuts shall meet the requirements of
32、3.13.2.2 and shall be 1/2-13 NC-2B or M14 heavy hex single chamfered or collar nuts of suitable dimensions to permit use of a 7/8-inch wrench for tightening. Ml4 nuts shall be used only with M14 bolts. The 1/2-13 NC-2B-nuts shall be used only with 1/2-13 NC-2A bolts. Thread length of the bolt shall
33、be sufficient to insure that three or more unused threads shall remain visible after the bolt has been torqued tolthe maximum test torque specified in 4.8.1.4. The bolt end threads on assembled couplers shall be upaet to discourage removal of the nut for field replacement and to prevent loss of the
34、nut during disassembly. Unless otherwise specified (see.6.21, the coupler shall be of right-handed configuration as defined in 6.7. The bolt-nut-coupler assembly shall withstand a torque of 125 foot-pounds (ft-lb) in a nonlubricated Condition. The coupler shall be furnished as an assembled unit. The
35、 unit sha.-ll have a minimum frictional holding capacity of 2,000 pounds (lb), and S with or without a female twist lock fitting conforming . b0 3,8 attached to one end and a male twist lock fitting conforming to 3.8 attached to the other end, as specified (see 6.2). and in the length specified (see
36、 6.2). Pipe and tubing shall be finished in accordance with 3.12. 2 2 3.10 Floor. Elate. The floor plate shall be either a malleable iron caating conforming to ASTM A 47 or a weldment made up of a steel plate and a auitable fitting or cylinder, The plate shall be nominal 8-inch diameter or 6-inch by
37、 6-inch square of 0.25 inch minimum thickness for four equally spaced 9/16-inch screw holes near the perimeter for mounting purposes. The base shall be furnished with either a twist lock fitting conforming to 3.8 or with a minimum li-inch length cylinder or steel bar stock sized to accept the outsid
38、e diameter of the applicable pipe or tubing as specified (see 6.2). When the floor plate, fitted with a cylinder, is specified, the oylinder shall be fitted with a thumb screw to lock the floor plate arJsembly to the scaffold member. The plate shall withstand a shear force of 5,000 lb and a compress
39、ive force of 20,000 lb. The floor plate shall be finished in accordance with 3.12. 3.11 _Ca.ster. Casters shall be nominal 8-inch diameter with steel or rubber wheels a# specified (see 6,2). Caster shall be provided with a foot aotuated locking device. Caster ahall either be provided with a male twi
40、st lock fitting conforming to 3.8, or with a minimum Li-inch length cylinder, sized to accept the outside diameter of the applicable pipe or tubing as Specified (see 6.2). When the caster, fitted with the cylinder, is specified, the cylinder shall be provided with a thumb screw to lock the caster as
41、sembly to the acaffold member. The steel wheel assembly shall support a load of 8,000 lb, The rubber wheel caster assembly shall support a load of 500 lb. The caster shall be clearly marked with the safe working load aB assembled. The caster assembly, except for the rubber wheel8 shall be finiahed i
42、n accordance with 3.12. 3.12 Finish, Scaffolding components to be finished, other than steel tubing or pipe shall be finished in accordance with ASTM A 153. Finiah of structural steel tubing, after cutting and seam welding of the tube, ahall conform to ASTM A 123. Finish of nteel pipe shall conform
43、to ASTM A 120. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.13 Workmanship. 3.13.1 Steel fabrication. The steel used in fabrication shall be free from kinks, sharp bends, and other conditions which would be delete- rious to the finished produc
44、t. Manufacturing processes shall not reduce the strength of the steel to a value less than intended by the design. Manufacturing processes shall be done neatly and accurately. All bends shall be made by controlled means to insure uniformity of size and shape. 1 3.13.2 Bolted connections. Bolt holes
45、shall be accurately punched or drilled and shall have the burrs removed. 3.13.2.1 Bolts. Bolts shall conform to ASTM A 449 for quenched and tempered medium carbon steel bolts with a minimum tensile strength of 120,000 lb/in . Bolts shall be commercially smooth and free from burrs, laps, .seams, crac
46、ks or other defects which would make them unsuitable for the intended application. Metric threads shall conform to ANSI ISO/R261. 2 3.13.2.2 Nuts. Nuts shall conform to ASTM A 563 for heavy hex nuts _I for u5e with quenched and tempered medium carbon steel bolts. Metric thread shall conform to ANSI
47、ISO/R261. 3.13.3 Riveted connections. All rivet holes shall be accurately punched or drilled and shall have the burrs removed. 3.13.3.1 Rivets. Rivets shall conform to industry standard for carbon steel rivets. Rivets shall completely fill the hole. Rivet heads shall be of an appr-oved shape and sha
48、ll be concentric with the rivet. Rivet head shall make full contact with the intended surface. The rivets shall be so fabricated as to develop a joint strength not less thas the design value. Rivets shall be commercially smooth and free from cracks (burst), duds or other defects which would make the
49、m unsuitable for the intended application. 3.13.4 Welding. Surfaces to be welded shall be free from foreign matter which would be injurious to the weld. Welding procedures shall be in accordance with WS D1.l. Welds shall be of sufficient size and ahape to develop the ful P design strength of the parts connected by the welds. Welds shall transmit imposed stresses without permanent deformation or failure when subjected to proof or service loadings. 3.13.4.1
