8−173The rail supports on posts shall be drafted or pitched to permit continuity of rails past the posts without cramping or crimping the rails. If rails are to be shop cut, positioning of anchor bolts must be checked in the field prior to cutting to establish rail lengths. Adjacent anchor bolts shall be trimmed as necessary to present a visual uniformity of grips. The anchor bolts shall extend or be trimmed to a proper grip for the nut. All aluminum faces to be installed in contact with concrete or dissimilar metal surface shall be heavily coated with an approved al uminum impregnated caulking com pound or zinc chromate paint. Alternatively, a synthetic rubber gasket may be placed between the two surfaces. 830.04 METHOD OF MEASUREMENT. "Aluminum One-Bar Ornamental Rail," "Steel Four-Bar Rail," "Baldwin Four-Bar Ornamental Rail," and "Steel Two-Bar Rail (Crash-Tested)" will be measured by the number of linear feet of each such type actually installed in accordance with the Plans and/or as directed by the Engineer.
830.05 BASIS OF PAYMENT. The accepted quantities of "Aluminum One-Bar Ornamental Rail,"
"Steel Four-Bar Rail," "Baldwin Four-Bar Ornamental Rail," and "Steel Two-Bar Rail (Crash- Tested)" will be paid for at their respective contract unit prices per linear foot as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials and equipment, including anchor assemblies and all incidentals required to finish the work, complete and accepted by the Engineer.
831.01 DESCRIPTION. This work consists of providing alum inum chain link fence at the locations
indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 831.02 MATERIALS. Materials for pedestrian chain link fence shall conform to both the applicable provisions of SECTION M.08; FENCE AND GUARDRAIL , of these specifications and the following additional requirements. 831.02.1 Wire Fabric. Aluminum chain link fence wire fabric shall be No. 9 gauge (.148" diameter) wire fabric and shall have a uniform diamond mesh measuring approximately 2 inches between parallel sides. It shall be woven from aluminum alloy 6061 T89-94 (ASTM B211) wire having a minimum tensile strength of 50,000 psi. After the fabric has been woven, it shall be cleaned to remove all weaving compounds and foreign matter. 831.02.2 Posts. Aluminum posts shall be 2½-inch schedule 40 (2.875" OD) pipe weighing 2.004 pounds per foot. The posts shall be aluminum alloy 6061-T6 (ASTM B221). 831.02.3 Rails . Aluminum rails shall be 1¼-inch schedule 40 (1.660" OD) pipe weighing 0.786 8−174 pounds per foot. The posts shall be aluminum alloy 6061-T6 (ASTM B221).
831.02.4 Fittings and Appurtenances. All fittings (tension bars, rail splices, washers and post
connection clamps) shall be aluminum alloy 6061- T6 (ASTM B221). The nuts shall be aluminum alloy 6061-T6 (ASTM B316). The bolts shall be aluminum alloy 2024-T4 (ASTM B316).
a.Wire Fabric Connections. Aluminum fabric shall be securely fastened to all terminal posts by 1 inch by 1/4-inch tension bars with 7/8-inch by 1/8-inch tension bands (aluminum alloy 6063-T5, ASTM B221) spaced approximately 6 inches apart and to all line posts and rails with No. 6 gauge (.194" diameter) wire ties (aluminum alloy 1100-H18) approximately 6 inches on center.
b.Tension Wires. Tension wires shall be 7-gauge (minimum) galvanized coil spring steel wire.
c.Anchorage Fittings. The aluminum base plates shall be aluminum alloy 6061-T6 (ASTM B221). Anchor bolts shall be 3/4-inch diameter galvanized bolts 8 inches long (ASTM A307). The portions of the aluminum base plate to be in contact with the concrete parapet and the steel anchor bolts shall be thoroughly coated with an approved aluminum impregnated caulking compound. 831.03 CONSTRUCTION METHODS. Pedestrian fence shall be erected in accordance with the details indicated on the Plans. Fence posts shall be set vertical. Maximum post spacing shall be 8'-0”. The fabric shall be secured with ties, stretchers and tensioning devices sufficiently to resist wind and weather loadings without noticeable sagging, billowing or skewing of the square patterns.
831.03.1 Tolerance. Standard plus or minus mill toleranc es on all framework members and chain
link fabric will apply. 831.04 METHOD OF MEASUREMENT. "Pedestrian Chain Link Fence - Aluminum" will be measured by the number of linear feet actually in stalled in accordance with the Plans and/or as directed by the Engineer. Measurement will be al ong the top of the fence from centerline to centerline of end posts for each continuous run of fence.
831.05 BASIS OF PAYMENT. The accepted quantity of "Pedestrian Chain Link Fence -
Aluminum" will be paid for at the contract unit price per linear foot as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, materials, tools and equipment, and all incidentals required to finish the work, complete and accepted by the Engineer. 8−175 SECTION 832 BRIDGE SIGNS 832.01 DESCRIPTION. This work consists of providing bridge identification signs and bridge minimum clearance signs on all bridges that intersect with highways, streets or ramps. Bridges over waterways, railroads or other non-vehicular fac ilities, unless specifically noted, will not require signs. Signs shall be installed for all directions of travel at locations described herein or as directed by the Engineer, all in accordance with these Specifications. 832.02 MATERIALS. 832.02.1 Reflectorized Sheeting. Reflectorized sheeting shall be Type III and shall otherwise conform to the requirements of Subsection M.16.02 of these Specifications. The colors used shall be white or silver-white for the bridge identifications signs and yellow for the bridge minimum clearance signs. 832.02.2 Aluminum Backing shall conform to the requirem ents of ASTM B209, Alloy 6061-T6 and shall be 0.063-inch in thickness. 832.02.3 Black Paint shall be a one component lead and chromate free paint suitable for use as a finish coat on the properly prepared reflectorized sheeting surface. The paint color shall meet the Federal Standard Number 595, Color 17038 (gloss black). Manufacturer's Product Data Sheets shall be submitted for approval of the Engineer prior to any use of the product in the manufacture of the signs.
832.02.4 Steel for wedge style anchors, clips, drop-in anchor bodies, and expansion plugs shall
meet the requirements of ASTM A108.
832.02.5 Fasteners for attaching bridge signs to fascia girders, either steel or concrete, shall be
hammer-driven lead anchors. The anchor consists of a 1/4-inch diameter shaft, 3/4-inch in length. The shaft has a round head at one end approximately ½-inch in diameter. The shaft is split into expandable sections ½-inch from its end. The anchor is provided with a zinc-coated nail, 1 _-inches long, placed in a hole through the center of the round head and through the solid portion of the shaft. 832.02.6 Plating for components shall be zinc and shall meet the requirements of ASTM B633, SC-1, Type III. 832.03 CONSTRUCTION METHODS. 832.03.1 Location.
a.Bridge Identification Signs . The location of the signs will be as noted on the Plans or as directed by the Engineer. The sign will be placed level on the web of the girder, face of concrete beam, wall or parapet as appropriate. The sign sha ll be centered vertically and centered above the
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 507–509 of 826.
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837 Repairs to Structural Concrete Masonry with Integrally Colored Concrete or Patching Mortar ……………. 8-183 Section 838 Saw Cut in Existing Concrete Walls …………………………..………. 8-187 Section 839 Remove and Dispose Bituminous Concrete Pavement From