621 Page 418621 CHAIN LINK FENCING
621.1DESCRIPTION
This work consists of furnishing and installing chain link wire mesh fence.
621.2MATERIALS
Chain link fence materials will conform to Section 930. Concrete will conform to Class M6, Section 462.
621.3CONSTRUCTION REQUIREMENTS
Posts will be set in concrete footings. To eliminate danger of frost heaving, the post concrete in the crown top will not be larger than the concrete in the lower portion of the footing. Posts will be spaced at not more than 10 foot intervals. In determining post spacing, measurements will be made parallel to the slope of the natural ground. Posts will be set vertically except at locations where the Engineer determines the posts should be placed perpendicular to the slope of the ground. Corner posts and adjacent brace panels will be constructed at angle points of 30 degrees or more in the fence alignment. Pull posts and adjacent panels will be constructed at sharp breaks in the vertical grades and at intervals of not more than 500 feet on straight runs of fence. The Contractor will remove all debris and perform necessary excavation and backfilling prior to installing the fence. Tension wires will be placed, stretched tight, and secured to all posts before fence fabric is placed. Sufficient tension will be applied to the tension wires to allow a maximum sag of 1/4 inch between posts after the fence fabric has been attached. Temporary bracing on posts will be provided to prevent undue stresses in the posts when tension is applied to one tension wire at a time. On curves the fence fabric will be placed so that tensioning the fabric will pull the fabric against the post. On tangent sections the Engineer will designate the side of the post to which the fence fabric will be attached. The bottom of the fabric will be placed 3 inches above the ground line. Over irregular ground, a minimum clearance of 1 inch and a maximum clearance of 6 inches will be permitted for a distance not to exceed 8 feet. The fence fabric will be cut and each span attached independently to all corner and pull posts. Rolls of wire fabric will be joined by weaving a single strand into each of the rolls to form a continuous mesh.
621.4METHOD OF MEASUREMENT
A.Chain Link Fence: Chain link fence will be measured by the foot parallel to the ground, inclusive of the end, corner, and pull post panels. 621 Page 419B.Chain Link Fence Gates: Quantities of chain link fence gates will be determined from a count of each type.
621.5BASIS OF PAYMENT
A.Chain Link Fence: Chain link fence will be paid for at the contract unit price per foot, inclusive of end, corner, and pull post panels. B.Chain Link Fence Gates: Chain link fence gates will be paid for at the contract unit price per each type. Payment will be full compensation for furnishing materials, labor, tools, miscellaneous hardware, fittings, and equipment necessary; excavation; backfilling; concrete footings; smoothing the irregularities of the ground at the fence site; clearing the line for the fence; and disposing of debris. 629 Page 420629 CABLE GUARDRAIL
629.1DESCRIPTION
This work consists of constructing 3 cable guardrail.
629.2MATERIALS
A.Cable: Cable will be 3/4 inch Type I, Class A coating, conforming to AASHTO M 30. B.Cable Splices, Ends, Fittings, and Anchor Assembly: When galvanizing is specified, these materials will be galvanized after fabrication to meet the requirements of ASTM A123. The top 6 inches of the anchor bolts and the nuts and washers will be galvanized in accordance with ASTM F2329. C.Compensating Device: Design for alternate combination, or single unit compensating device and turnbuckle assembly, may be submitted for approval. D.Hook Bolts: Hook bolts will develop an ultimate pull open strength, applied in a direction normal to the longitudinal axis of the post, from 500 to 1000 pounds. The bolts will be galvanized in accordance with ASTM F2329. E.Steel Posts:
1.Structural Steel Posts: Structural steel posts and anchor plates will conform to the requirements of ASTM A709 Grade 50. The posts will be galvanized after fabrication in accordance with ASTM A123. 2.Flanged Channel Posts: Flanged channel posts will be fabricated from rerolled rail steel bars conforming to ASTM A499, Grade 60. The post will meet the chemical properties of ASTM A1 for rails 30 pounds per foot and heavier. Post lengths will be as specified plus or minus 1 inch and will weigh a minimum of 4.0 pounds per foot plus or minus 3.5%. Posts will be painted with a baked on high quality dark green enamel. All punching, boring, cutting, shearing, and welding will be done prior to painting. Holes 3/8 inch in diameter will be punched or bored on 1 inch centers beginning at the top of the post and extending to the bottom. F.Concrete: Concrete will be Class M6, as specified in Section 462.
629.3CONSTRUCTION REQUIREMENTS
A.Guardrail Alignment: Posts and rail will be set to the plans shown alignment using a string line or other approved methods. B.Posts: Posts will be set plumb. Regardless of the method of setting posts, the posts will be firm, and at the locations, spacing, and height shown on the plans. When guardrail posts are installed through asphalt concrete shoulders, the Contractor will take care to minimize damage to the asphalt concrete. If during post installation the asphalt