SCOPE
713.01.01 Materials Covered. This specification covers the quality of bar steel, welded wire reinforcement , and
prestressing steel . PHYSICAL PROPERTIES AND TESTS
713.03.01 Bar Steel Reinforcement. This steel shall conform to the applicable following requirements:
Deformed Billet -Steel Bars for Concrete Reinforcement .......................................................... AASHTO M31, Grade 300 (40) or 420 (60) Low Alloy Steel Deformed and Plain Bars for Concrete Reinforcement ................................ ................................ .................. ASTM A706 Spiral /Welded Hoop Reinforcement ................................ ....................................................................................................... ASTM A706 Unless specified otherwise, use reinforcement conforming to AASHTO M31 or ASTM A706. Reinforcing steel bars for longitudinal bars in columns and for welded applications shall conform to ASTM A706. Generally, reinforcement bars for minor structures, sign and signal foundations, and concrete barrier rails may conform to AASHTO M31. Spiral or hoop reinforcement in columns and piles may be furnished deformed or plain. Reinforcing steel bars failing to meet the minimum unit stress when calculated on the basis of AASHTO M31 or ASTM A706 may be considered acceptable if minimum specification requirements are satisfied by computing the “Section Area” method described in Test Method No. Nev. T484. Furnish 3 copies of certified mill test results for each heat of steel supplied to the project. Additionally furnish two 750 mm (30 in.) samples of each size per heat for testing. Field samples may also be tested from “extra” bars as required in Subsection 505.02.02.
713.03.02 Welded Wire Reinforcement. This steel shall conform to ASTM A1064.
713.03.0 3 Prestressing Steel. Prestressing steel shall be high tensile wire conforming to AASHTO M204,
including all supplementary requirements; high tensile seven wire strand conforming to AASHTO M203; or uncoated high- strength steel bars conforming to AASHTO M275, including all supplementary requirements. The maximum mass requirement of AASHTO M275 will not apply. In addition to the requirements of AASHTO M275, for deformed bars, the reduction of area shall be det ermined from a bar from which the deformations have been removed. The bar shall be machined no more than necessary to remove the deformations over a length of 300 mm (12 in.), and reduction will be based on the area of the machined portion. Use the same grade bars in any individual member, unless otherwise permitted. When bars are to be extended by the use of couplers, the assembled units shall have a tensile strength of not less than the manufacturer’s minimum guaranteed ultimate tensile strength of the bars. Failure of any one sample to meet this requirement will be cause for rejection of the heat of bars and lot of couplers. Place couplers at approved locations. Straighten wires if necessary to produce equal stress in all wires or wire groups or parall el lay cables that are to be stressed simultaneously or when necessary to insure proper positioning in the ducts. Sampling and testing shall conform to AASHTO M203 and AASHTO M204 and as specified below. Assign all bars of each size from each mill heat, all wire from each coil, and all strand from each manufactured reel to be shipped to the site an individual lot number and tag in such a manner that each such lot can be accurately identified at the jobsite. Likewise identify each lot of anchorage assembli es and bar couplers to be installed at the site. Submit records identifying assigned lot numbers with the heat, or reel of material represented. All unidentified prestressing steel, anchorage assemblies or bar couplers received at the site will be rejected. 713 REINFORCEMENT Furnish samples for testing from each size and each heat of prestressing bars, from each manufactured reel of prestressing steel strand, from each coil of prestressing wire, and from each lot of anchorage assemblies and bar couplers to be used. Submit w ith each sample of prestressing steel wires, bars, or strands furnished for testing, a certification stating the manufacturer’s minimum guaranteed ultimate tensile strength of the sample furnished. No additional compensation will be given for any work del ayed awaiting approval of the materials furnished for testing. Furnish, at least 15 days in advance of anticipated use, the following samples of materials and tendons which will be selected from the prestressing steel at the plant or jobsite:
a.For wire, strand, or bars, furnish 1.5 m (5 ft) long samples of each size for each heat and pack or reel.
b.If the prestressing tendon is to be prefabricated, furnish one completely fabricated prestressing tendon 1.5 m (5 ft) in length for each size of tendon, including anchorage assemblies. If the prestressing tendon is to be assembled at the jobsite, furnish sufficient wire or strand and end fittings to make up one complete prestressing tendon 1.5 m (5 ft) in length for each size of tendon, including anchorage assemblies.
c.If the prestressing tendon is a bar, furnish one 1.5 m (5 ft) length complete with one end anchorage and furnish in addition, if couplers are to be used with the bar, two 1.2 m (4 ft) lengths of bar equipped with one coupler and fabricat ed to fit the coupler. For prefabricated tendons, give at least 1 4 days notice before commencing the installation of end fittings or the heading of wires. End fitting installations and wire headings will be inspected while such fabrication is in progress at the plant. The required testing will be arranged for the material to be shipped to the site. Do not ship any prefabricated tendon to the site without first having been released by the Engineer, and tag each tendon before shipment for identification purposes at the site. All unidentified tendons received at the site will be rejected. Consider jobsite or site as referred to herein to mean the location where the members are to be manufactured whether at the bridge site or a removed casting yard. SECTION 714 PAINT SCOPE
714.01.01 Materials Covered. This specification covers the quality, color, and number of applications of paint.
REQUIREMENTS
714.02.01 Certificates. Furnish written certification that all required tests have been satisfactorily completed
and that the materials thereof comply with all the requirements. Supply paint samples to verify compliance when requested. PHYSICAL PROPERTIES AND TESTS
714.03.01 Paint for Iron and Steel. (a) General. For use on structural steel used for bridge members, see
paragraph (b) below. Choose from Steel Structures Painting Council (SSPC) Alkyd Paint System 2.00 or Phenolic Paint System 3.00 when metal rail, bridge or pedestrian rail are specified to receive paint or when painting struct ural steel, miscellaneous iron and steel standards. The color of paint shall be as shown on the plans or specified in the Special Provisions. Do not use lead base paint. Submit for approval a letter indicating choice of system, accompanied by certificates attesting that the products chosen meet the applicable specifications and requirements before application of any paint.
b.Structural Steel Used for Bridge Members. Submit for approval a letter indicating choice of the complete coating system from one of the approved coating systems listed in the QPL. The color of the paint shall be as shown on the plans or as specified in the Special Provisions. Paint used for touch- up in the field or shop, shall be the same as used for the initial painting.
714.03.02 Paint for Timber. Use the following paints for cattle guard wings, bridge railings, sign posts, and
miscellaneous timber structures. Purpose Number of Coats Color General Type Federal Specification Prime 1 White Mixed Pigment Exterior Wood Primer TT-P-25 Intermediate (first coat after primer) 1 Cream Titanium Zinc Oxide TT-P-102 Class B Finish (second coat after primer) 1 White Titanium Zinc Oxide TT-P-102 Class B Trim, Lettering and Indications (used when so indicated on plans) 1 Black Titanium Zinc Oxide TT-P-61
714.03.03 Paint for Concrete. Use the following paint for miscellaneous concrete specified to receive paint.
Purpose Number of Coats Color General Type Formula or Specification Finish 1 White Water Thinned Acrylic Resin or Synthetic Latex Alkyd Emulsion
714.03.04 Paint for Aluminum. Prepare aluminum bridge railing and posts specified to receive paint by
applying a chemical conversion coating conforming to MIL- C-5541. Apply the coating according to the manufacturer’s specifications and recommended sequence of operations. Any of the paint systems specified for use on iron or steel in Subsection 714.03.01 may be used for painting aluminum. Submit for approval a letter indicating choice of system as required for iron or steel.
Source: Nevada Standard Specifications for Road and Bridge Construction, 2014 Edition. Pages 553–554 of 610.