M 41-10 Page 8-143 Glare Screen 8-258-25 Glare Screen
8-25.1 Description
This Work consists of furnishing and constructing glare screen of the types specified, in accordance with the Plans, these Specifications, the Standard Plans , and as ordered by the Engineer in accordance with Section 1-04.4 . Glare screen consists of diamond woven wire mesh fence of aluminum, galvanized or aluminum coated steel wire, fabricated and placed to reduce glare from headlights of opposing traffic or other adjacent light sources.
8-25.2 Materials
Materials shall meet the requirements of Section 9-16.6 .
8-25.3 Construction Requirements
8-25.3(1) Glare Screen Fabric
Glare screen fabric shall be placed on the face of the posts designated by the Engineer. On curves, the fabric shall be placed on the face of the post that is on the outside of the curve. The fabric shall be stretched taut and securely fastened to the posts. Fastening to end, corner, and pull posts shall be with stretcher bars and fabric bands spaced at 1-foot intervals. The fabric shall be cut and each span attached independently at all pull and corner posts. Fabric shall be securely fastened to line and brace posts with tie wires, metal bands, or other approved methods, attached at 14-inch intervals. The top and bottom of the fabric shall be fastened to the tension wire with hog rings spaced at 24-inch intervals. Rolls of wire fabric shall be joined by weaving a single strand into the end of the rolls to form a continuous mesh.
8-25.3(2) Slats
The slats shall be fastened into the weave by using staples, screws, or other methods as approved by the Engineer. Allowing the tension of the mesh to hold the slats in place will not be permitted. Slats broken or split during construction shall be removed and replaced by the Contractor at no expense to the Contracting Agency.
8-25.3(3) Posts
Posts shall be constructed in accordance with the Standard Plans and applicable provisions of Section 8-12.3(1)A . Posts for Type 1 Design A shall be bolted to the beam guardrail posts as detailed in the Standard Plans . Drilling of the guardrail posts shall be done in such a manner to ensure that the glare screen posts are set plumb and centered over the guardrail posts unless otherwise directed. All round posts for Type 1 Design B and Type 2 glare screen shall be fitted with a watertight top securely fastened to the post. Line posts shall have tops designed to carry the top tension wire.
8-25.3(4) Tension Wire
Tension wires shall be attached to the posts as detailed in the Standard Plans or as approved by the Engineer.
8-25.4 Measurement
Measurement of glare screen will be by the linear foot of completed glare screen for the particular type and design specified. Page 8-144 M 41-10
8-25 Glare Screen8-25.5 Payment
Payment will be made for each of the following Bid items that are included in the Proposal: “Glare Screen Type 1 Design ____”, per linear foot. “Glare Screen Type 2”, per linear foot.