864.02 Posts.
beam (including a splice at the center) be less than 80,000 pounds {355 kN} for Class A or 100,000 pounds {445 kN} for Class B. The shape shall meet AASHTO M 180 requirements.
b.Barrier Rail . The barrier rail elements, including all accessories, shall conform to the material requirements shown on the plans for the type material of which the barrier rail is to be constructed.
864.02 Posts.
a.Treated Timber Posts . Timber posts shall be sawed to within plus or minus 1 inch {25 mm} of the length and plus or minus 3/8 of an inch {10 mm} of the full end dimensions shown on the plans. Timber block -outs shall be sawed to within 1/4 of an inch {6 mm} of the length and plus or minus 3/8 of an inch {10 mm} of the full end dimensions shown on the plans. Holes shall be drilled slightly smaller than the designated bolt size so as to provide a driving fit. All timber shall be Southern Yellow pine, Grade No. 1SR or better, in accordance with the Southern Yellow Pine Inspection Bureau's grading system. Post and blockout treatment shall be in accordance with AWPA -U-1 as applicable to guardrail posts. The preservative shall be one recommended under AWPA -U-1 except that within a contract only one type will be permitted unless otherwise permitted in writing by the Engineer. All timber posts and blockouts should be fabricated and holes drilled before treatment, but where field modific ations of necessity are made after treatment, the new surfaces shall be given a preservative treatment in accordance with the provisions of AWPA -M-4 using a method approved by the Engineer.
b.Metal Posts . Steel posts, including block -outs for guardrail, shall comply with the requirements of ASTM A 36, modified to waive the maximum tensile strength. All material shall be new and of the size, shape, etc. noted by the plan details, hot -dip galvanized after fabrication. Metal posts for barrier rails shall be steel meeting the requirements noted in paragraph one above or when aluminum barrier rail is used, aluminum posts conforming to the requirements of ASTM B 221, Alloy 6351- T4 or 6061- T4 of the size, shape, etc. noted by plan details.
864.03 Anchors.
Concr ete for anchors shall be constructed of Class A concrete in conformity with the requirements given in Section 501. All surfaces shall be given a Class 1 finish with all exposed surface given a Class 2 surface finish. Metal parts used in anchors shall compl y with the appropriate requirements for metals noted elsewhere in this Section or other portions of these Specifications. Wire rope (cable) for anchors shall be 3/4 inch {19 mm} nominal diameter meeting the requirements of AASHTO M 30, Type II, having a Cl ass A galvanization coating.
864.04 Galvanization.
All metal required by the plans or specifications to be galvanized shall be galvanized after fabrication in accordance with AASHTO M 111 amended to cover the weight {mass} of the zinc coating specified in Article 864.01. Shop fabrication shall be considered to include all work necessary to prepare the unit for immediate and complete installation. No punching, cutting, burning, or welding will be permitted in the field except for special details in exception al cases as may be directed by the Engineer; however, in such cases, holes shall be drilled and cutting done by sawing and the area treated as provided in Subarticle 630.03(c).
870.01 Description.
This Section s hall cover the requirements for adhesives used in the following phases of highway construction.
871.01 Chain Link Fence.
870.02 Adhesives For Pavement Markers.
a.Permanent Marker Adhesive . Adhesives furnished for use to affix permanent pavement markers to the pavement shall be l isted on List V -2, PERMANENT PAVEMENT MARKERS, MARKER ADHESIVE, DELINEATORS AND HAZARD MARKERS, of the Department's "Materials, Sources, and Devices With Special Acceptance Requirements" Manual. Refer to Subarticle 106.01(f) and ALDOT -355 concerning this l ist.
b.Temporary Marker Adhesive . Adhesives furnished to affix temporary markers to the pavement shall be any suitable type of adhesive for the intended purpose, except that in those locations where the markers will be required to be removed, the adhesiv e shall be a type that will allow for the complete removal of the marker without scarring or disfiguring the pavement.
870.03 Epoxy Adhesives for Bonding Concrete to Concrete and Concrete to Other
Materials. Epoxy adhesive furnished for use in bonding concrete and other materials (except pavement markers) shall meet the appropriate requirements of AASHTO M 235 for the type of work for which the adhesive is to be used. The "Volatile Content, Cured System" requirement of AASHTO M 235 sh all be waived. The Type, Grade, and Class of the epoxy adhesive to be used in the work will be shown by plan details, by these specifications, or as ordered by the Engineer. Adhesives furnished for use shall be listed on List II -7, EPOXIES FOR USE WITH PORTLAND CEMENT CONCRETE, of the Department's "Materials, Sources, and Devices With Special Acceptance Requirements" Manual. Refer to Subarticle 106.01(f) and ALDOT -355 concerning this list.
870.04 Adhesives for Concrete Anchoring Systems.
Adhesives furnished for use to anchor tie bars in concrete or other concrete anchoring systems shall be listed on List II -15, CONCRETE ANCHORING SYSTEMS, of the Department's "Materials, Sources, and Devices With Special Acceptance Requirements" Ma nual. Refer to Subarticle 106.01(f) and ALDOT -355 concerning this list. SECTION 871 FENCING MATERIALS
871.01 Chain Link Fence.
Materials for chain link fence unless specified otherwise on the plans shall conform to the following:
a.Fabric . Fence fabric shall meet the requirements of AASHTO M 181 using 2 inch uniform square mesh made from 0.148 inch (9 gage) {3.75 mm} wire with either a Type I, Class D (zinc coated steel); or Type II (Aluminum coated steel) finish. Whe n a polyvinyl chloride coating is specified either a Class A or a Class B coating will be acceptable.
b.Supports . Supports shall meet the requirements of AASHTO M 181 and be either metallic coated steel Grade 1 or Grade 2, or Aluminum. Minimum sizes and weights of posts, rails and framing for all steel elements shall be as follows:
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 801–801 of 934.