610—GABIONS

610.01 Description

This work shall consist of furnishing, assembling, and installing gabions in accordance with these Specifications and in conformity to the lines, dimensions, and grades shown on the Plans or as established by the Engineer.

610.02 Materials

610.03 Procedures

Gabions shall be fabricated in such a manner that the sides, ends, lid, and diaphragms can be assembled at the construction site into rectangular wire mesh baskets. Gabions shall be of single unit construction whereby the base, lid, ends, and sides are woven into a single unit or whereby one edge of these units is connected to the base section of the gabion. The strength and flexibility at the point of connection shall be at least equal to those of the wire mesh. If the length of the gabion exceeds its horizontal width, the gabion shall be equally divided into cells by diaphragms of the same mesh and gage as the body of the gabion. The length of each cell shall not exceed its width. The gabion shall be furnished with the necessary diaphragms securely tied in their proper positions on the base so that no additional tying at the junction will be necessary. Perimeter edges of the mesh forming the gabion shall be securely clip bound or selvedged in such a manner that the joints formed by tying the selvedges will have at least the same strength, durability, and integrity as the body of the mesh. The Contractor shall supply tie and connection wire in sufficient quantity to securely fasten all edges of the gabion and diaphragms. At least two cross connecting wires shall be in each cell whose height is one-third or one-half the width of the gabion. At least four cross-connecting wires shall be in each cell whose height equals the width of the gabion. The wire shall be secured through two open loops of the cage. The Contractor shall perform excavating and backfilling operations for the installation of gabions according to Section 303. Gabions shall be placed on a smooth foundation, and the final line and grade shall be approved by the Engineer.610.01 785Each gabion unit shall be assembled by binding the vertical edges with wire ties at approximately 6 inch intervals or by stitching a continuous piece of connecting wire around the vertical edges with a coil ap - proximately every 4 inches. Wire ties or connecting wire shall be used to join units in the same manner as described for assembling. Internal tie wires shall be uniformly spaced and securely fastened in each cell of the structure. The Contractor may use a standard fence stretcher, chain fall, or iron rod to stretch wire baskets and hold the installation alignment. The Contractor shall fill gabions with stone so that the finished basket maintains alignment, has a mini - mum of voids, and avoid bulges. Rock and connection wires shall be alternately placed until the gabion is filled. After the gabion is filled, the lid shall be bent over until it meets the sides and edges of the gabion. The Contractor shall then secure the lid to the sides, ends, and diaphragms with wire ties or connecting wire in the manner described hereinbefore.

610.04 Measurement and Payment

Gabions will be measured in cubic yards and will be paid for at the Contract unit price per cubic yard. This price shall include furnishing, assembling, excavating, installing and backfilling with suitable material, compacting, and disposing of surplus or unsuitable material. Minor structure excavation for gabions, when specified on the Plans, will be measured and paid for in accordance with Section 303. Payment will be made under: ———————————————————————— Pay Item Pay Unit———————————————————————— Gabion Cubic yard———————————————————————— 610.04 787DIVISION VII TRAFFIC CONTROL DEVICES 789700.02 SECTION 700—GENERAL

700.01 Description

These specifications cover general construction items, methods, and procedures common to the furnishing and installing traffic control devices, Intelligent Transportation Systems (ITS), and associated systems. Installation of materials shall be accomplished in accordance with the manufacturer’ s instruc - tions except when otherwise indicated. All electrical work shall be in accordance with the applicable National Electrical Code (NEC) unless otherwise specified herein. Refer to the latest applicable edition of the National Fire Protection Association (NFPA)/NEC for electrical technical definitions, acronyms and abbreviations.

700.02 Materials