6-68 SECTIO N 620 – FENCES AND HAND RAILINGS 620.0 1 DESCRIPTION . This work shall consist of the construction of fences , gates , and hand railings . 620.0 2 MATERIALS . Materials shall meet the requirements of the following subsection s: Mortar, Type I ................................ ................................ ................................ ............ 707.01 (b) Structural Steel ................................ ................................ ................................ ........... 714.02 Carbon Steel Bolts, Nuts, and Washers ................................ ................................ .....714.04 Steel Tubing ................................ ................................ ................................ ............... 714.11 Galvanizing ................................ ................................ ................................ ................ 726.0 6 Metalizing ................................ ................................ ................................ .................. 726.0 7 Woven Wire Fence ................................ ................................ ................................ ....727.01 Chain -Link Fence ................................ ................................ ................................ .......727.02 Snow Barrier Fence ................................ ................................ ................................ ....727.0 5 Plank Rail Fence ................................ ................................ ................................ ........ 727.06 Posts ................................ ................................ ................................ ........................... 728.01 Cable, W -Beam, and Thrie Beam Guardrail Hardware ................................ ............. 728.03(a) Metal Hand Railing ................................ ................................ ................................ ....732.01 Grounding Electrodes ................................ ................................ ................................ 752.11 Barbed wire for barbed wire fence shall be in accordance with Subsection 727.01(b) . Posts and braces for barbed wire fence shall be wood in accordance with Subsection 727.01(c) or steel in accordance Subsection 727.01(d) as specified on the Plans. Miscellaneous hardware for barbed wire fence shall be in accordance with Subsection 727.01(f) . When split -rail fence is specified on the Plans, rails and posts shall be made of premium white cedar. Rails and posts shall be free of any chemicals or toxic preservatives or treatments. The Contractor may use preformed 1/16 inch × 3/8 inch flat aluminum wire bands to attach the chain -link fabric to the galvanized pipe support framework . The bands shall be made of 5052 -H32 alloy having a minimum tensile strength of 30 ksi, and an approved closure, as an alternative to the stainless steel clips shown on the Plans. Concrete shall meet the requirements of Section 541 for Concrete, Class B. Unless otherwise specified, all material for hand railings shall be galvanized. Hand railing base plate s shall meet the requirements of Subsection 727.01(d) and h and railing hardware shall meet the requirements of Subsection 727.01(f) . 6-69 620.0 3 GENERAL REQUIREMENTS . All trees, brush, and other obstructions which interfere with proper grade, alignment, and construction of fences shall be removed and disposed of as specified in Section 201 , unless otherwise directed by the Engineer . Modification of the alignment may be made as directed by the Engineer to preserve valuable trees or other features. Posts shall be set plumb at the spacing and depth shown on the Plans and, when used for property line fence, shall be erected parallel to and 6 inches inside the right -of-way line. The wire shall be placed on the far side of the posts with respect to the transportation facility. Existing fences shall be connected to new fences as shown on the Plans . Corner posts with braces for every direction of strain shall be placed at the jun ction with existing fences, and the wire in both fences shall be properly fastened to the posts. In no case shall the fence be connected to a structure. 620.0 4 WOVE N WIRE FENCE . Where the groun d is too soft to hold the post firmly and in depressions where stresses will tend to pull posts from the ground, a second post shall be installed to such depth as necessary , and the two posts tied together securely as shown on the Plans. Wood posts shall b e set with the large end down in previously dug holes and backfilled with approved material . When tops of treated posts are cut as shown on the Plans or directed by the Engineer, the cut end shall be treated in accordance with AWPA Standard M4 . Steel posts shall be set with anchor plates down, except that when set in rock the anchor plates shall b e omitted . When driving posts, the tops shall be protected by driving caps. When bedrock is encountered, steel posts shall be used instead of wood posts . The posts shall be set in drilled holes to the depth shown on the Plans and grouted with Type I mortar so that they are firmly held in position . When boulders are encountered, they shall be removed, the hole backfilled with suitable material s, thoroughly compacted, and the holes re -drilled before installing the posts in the usual manner. The fence shall be braced as shown on the Plans or directed by the Engineer, with one brace at each end post, including end posts at gates and two braces at each intermediate post, or pull post, and at corner posts where the change in horizontal alignment is in excess of 15 °. The posts and braces for steel corner, end, and pull posts shall be set in concrete as shown on the Plans . The concrete may be mixed by hand. 6-70 The woven wire fence shall be stretched taut and attached to the posts so that the bottom wire is approximately 3 inches above the ground. When wood posts are used, each horizontal wire shall be fastened to the posts with 9 -gauge galvanized or aluminum -coated staples 1 -1/2 inches long . When steel posts are used, each horizontal wire shall be fastened t o the posts with aluminum bars, galvanized steel bars, or 11 -gauge rust -resistant spring wire clips . Instead of the fasteners, posts equipped with fastening studs approximately 1/2 inch high and 2 -1/4 inches apart may be used. 620.0 5 CHAIN -LINK FENCE . Posts shall be set in concrete bases of the dimensions shown on the Plans. Where the ground is too soft to firmly hold the line, end, corner, pull, or gate posts, a post of sufficient length shall be used to obtain stability as directed by the Engineer. Where rock is encountered, the posts shall be set in drilled holes to the depth shown on the Plans and grouted with Type I mortar so they are firmly held in position . When boulders are encountered, they shall be remov ed, the hole backfilled with suitable material s, thoroughly compacted, and the hole re -drilled before installing the posts in the usual manner. The wire fabric shall be properly stretched, without sags or buckles, and attached to the posts as shown on the Plans . Tension wires shall be installed top and bottom as indicated . After erection, any galvanized parts or fittings that have been abraded so that the base metal is exposed shall be painted with two coats of an approved coating. Any abrasions on aluminum -coated steel chain -link fence and the contacting surface of aluminum alloy, or aluminum -coated steel chain -link fence with concrete, stone, or masonry shall be thoroughly coated with an approved coating . Abraded areas shall receive a second coat of alumin um paint . The paint shall be allowed to dry thoroughly before installation of the fence. Where chain -link fence is used in the areas of bicycle paths, the top selvedge shall be knuckled. 620.0 6 BARBE D WIRE FENCE . Barbed wire fencing shall be installed as shown on the Plans and as directed by the Engineer. Fence wire shall be stretched by a mechanical stretcher or other devices designed for this use. Posts shall be equally spaced to match existing fencing and shall be of the type and size specified on the P lans. Anchor or corner posts shall be installed to a buried depth of 3 -1/2 feet. Intermediate posts shall be installed to a buried depth of 2 -1/2 feet. The exposed height of posts shall match that of existing posts. 6-71 620.0 7 SPLIT RAIL FENCE . Posts and rails shall be installed true, plumb, and level at the spacing and depths shown in the Plans. The use of explosive fasteners, screws, or nailing for securing framing and blocking will not be allowed unless approved by the Engineer. 620.0 8 SQUAR E STEEL FENCE . Posts for fencing shall be set plumb at the spacing and depth shown on the Plans. Fencing shall be installed to the configuration shown in the Plans, as recommended by the manufacturer and as directed by the Engineer. Steel tubing shall be in acco rdance with Subsection 714.11 and metalized in accordance with Subsection 726.0 7. 620.0 9 PLAN K RAIL FENCE . Plank rail fence shall be installed as shown on the Plans.
620.10 SNO W BARRIE R FENCE . Snow barrier fence shall be installed as detailed and at the locations
shown on the Plans . The wire fabric for the snow barrier fence shall be 1 inch square mesh . The bottom and top selv edges shall be knuckled. The snow barrier mesh shall be installed on the traffic side of the snow barrier framework.
620.11 REMOVIN G AND RESETTIN G FENCE . Existing fence and posts shall be carefully removed at
locations shown on the Plans . Any material damaged while being removed, hauled, or stored and during the process of resetting, due to carelessness on the part of the Contra ctor as determined by the Engineer, shall be replaced with new material s at the Contractor’s expense. The posts shall be reset in the same manner as posts for new fence and to the same depth and spacing of the fence before removal. The material used for fe ncing between posts shall be securely fastened to the posts in their new locations as shown on the Plans for the type of fence being installed.
620.12 REMOVA L OF EXISTIN G FENCE . Existing fence and posts shall be removed at locations
shown on the Plans . When fence is to be salvaged for future use, the Contractor will exercise care during removal to prevent damage and will stockpile the fence at locations indicated in the Contract o r as directed by the Engineer . When fence is not to be salvaged, it shall become the property of the Contractor and will be removed from the project area in a manner acceptable to the Engineer. 620.1 3 GATES . The gates shall be of the design shown on the P lans and shall be completed in a neat and professional manner . The gate holdbacks and center stops shall be set in concrete similar to the design and specification s for chain -link fence line posts . The top rail of the gates shall be level along the entire top of the gates. 6-72 620.14 HAND RAILING . Hand railings shall be installed as shown on the Plans. The Contractor shall prepare and submit fabrication drawings in accordance with Subsection 105.06 . Hand railing installation, handling, and repair shall conform to all applicable provisions of Section 506 and the surfaces and coatings shall meet the requirements of Subsection 506.2 2. 620.1 5 METHO D OF MEASUREMENT . The quantity of the type and size of fence specified to be measured for payment will be the number of linear feet installed in the complete and accepted work . Measurement will be along the top of the fence from outside to outside of end posts for each continuous run of fence . Measurement will include fence at bracing assemblies but not at gates. The quantity of the type and size of gate specified to be measured for payment will be the number of linear feet of clear distance between gate posts in the complete and accepted work . The quantity of Bracing Assembly for Chain -Link Fence of the type and s ize specified to be measured for payment will be the number of bracing assemblies installed for end, gate, corner, and pull posts in the complete and accepted work . The quantity of Steel Brace for Woven Wire Fence and Wood Brace for Woven Wire Fence to be measured for payment will be the number of braces installed in the complete and accepted work . If double braces are installed on a post, two units will be measured for payment. The quantity of Removing and Resetting Fence and Removal of Existing Fence to b e measured for payment will be the number of linear feet of fence in its original position, measured outside of its end posts for each continuous run of fence, including gates. The quantity of Hand Railing to be measured for payment will be the number of l inear feet of hand railing placed in the complete and accepted work. 620.1 6 BASIS OF PAYMENT . The accepted quantities of the type and size of f ence and gate specified to be installed or removed and reset will be paid for at the Contract unit price per lin ear foot. The accepted quantities of Bracing Assembly for Chain -Link Fence, Steel Brace for Woven Wire Fence, and Wood Brace for Woven Wire Fence will be paid for at the Contract unit price for each type specified. The accepted quantity of Removing and Res etting Fence will be paid for at the Contract unit price per linear foot. The accepted quantity of Removal of Existing Fence will be paid for at the Contract unit price per linear foot. Payment will include compensation for stockpiling or disposal, as appr opriate. 6-73 The accepted quantity of Hand Railing will be paid for at the Contract unit price per linear foot. Payment will be full compensation for furnishing, transporting, handling, assembling, and placing the material s specified and for furnishing all labor, tools, equipment , and incidentals necessary to complete the work . The costs of clearing and grubbing, ex cavation, backfilling, concrete bases, brace plates, anchor plates, electrical grounding, drilling of rock, grouting of holes, extra length posts, and countersunk posts will not be paid for directly but will be considered incidental to the Contract item s involved. Payment will be made under: Pay Item Pay Unit 620.1 004 Chain -Link Fence, 4 Foot ................................ ................................ ......... Linear Foot 620.1 006 Chain -Link Fence, 6 Foot ................................ ................................ ......... Linear Foot 620.1 008 Chain -Link Fence, 8 Foot ................................ ................................ ......... Linear Foot
620.15 04 Gate for Chain -Link Fence, 4 Foot ................................ ........................... Linear Foot
620.1 506 Gate for Chain -Link Fence, 6 Foot ................................ ........................... Linear Foot 620.1 508 Gate for Chain -Link Fence, 8 Foot ................................ ........................... Linear Foot
620.20 04 Bracing Assembly for Chain -Link Fence, 4 Foot ................................ .....Each
620.2006 Bracing Assembly for Chain -Link Fence, 6 Foot ................................ .....Each 620.2 008 Bracing Assembly for Chain -Link Fence, 8 Foot ................................ .....Each
620.25 00 Woven Wire Fence with Steel Posts ................................ ......................... Linear Foot
620.26 00 Woven Wire Fence with Wood Posts ................................ ....................... Linear Foot
620.30 00 Drive Gate for Woven Wire Fence ................................ ........................... Each
620.40 00 Steel Brace for Woven Wire Fence ................................ .......................... Each
620.41 00 Wood Brace for Woven Wire Fence ................................ ......................... Each
620.45 00 Plank Rail Fence ................................ ................................ ....................... Linear Foot
620.50 00 Removing and Resetting Fence ................................ ................................ Linear Foot
620.55 00 Removal of Existing Fence ................................ ................................ .......Linear Foot
620.7500 Snow Barrier Fence ................................ ................................ ................... Linear Foot 620.8000 Barbed Wire Fence ................................ ................................ ................... Linear Foot 620.8100 Split Rail Fence ................................ ................................ ......................... Linear Foot 620.8200 Square Steel Fence ................................ ................................ .................... Linear Foot 620.9000 Hand Railing ................................ ................................ ............................. Linear Foot 6-74 SECTION 621 – TRAFFIC BARRIERS
621.01 DESCRIPTION . This work shall consist of furnishing, assembling, removing, repairing, or
resetting traffic barriers.
621.02 MATERIALS . Materials shall meet the requirements of the following subsections:
Grease Rustproofing Compound ................................ ................................ ................ 708.04 Coatings for Wood ................................ ................................ ................................ .....708.05 Galv anizing ................................ ................................ ................................ ................ 726.06 Posts ................................ ................................ ................................ ........................... 728.01 Beam and Cable Elements ................................ ................................ ......................... 728.02 Hardware ................................ ................................ ................................ .................... 728.03 Offset Blocks ................................ ................................ ................................ ............. 728.04 Concrete Anchors ................................ ................................ ................................ .......728.05 Manufactured Terminal Sections ................................ ................................ ............... 728.06 Energy Absorption Attenuators ................................ ................................ ................. 728.07 Temporary Traffic Barrier ................................ ................................ ......................... 728.08 Flat Sheet Aluminum ................................ ................................ ................................ .750.03 Retroreflective Sheeting ................................ ................................ ............................. 750.04 Reinforcing steel shall meet the requirements of Section 507 . Materials for removing and resetting guardrail, replacing guardrail post assemblies, replacing guardrail beam units, and adjust the height of guardrail sha ll consist of the acceptable beams and cable, posts, offset blocks, bolts, and other hardware of the existing guardrail together with the necessary new replacement parts. The new replacement parts shall match the existing components they replace as closely as possible. All welding shall conform to the requirements of Subsection 506.10 .
621.03 FABRICATION DRAWINGS . The fabricator of guardrail approach sections furnished under this
section shall submit detailed fabrication drawings in accordance with Subsect ion 105.06 .
621.04 POSTS AND OFFSET BLOCKS . Posts may be set in holes, or they may be driven if suitable
caps and driving equipment are used to prevent damage to the posts. The installed posts shall be plumb, accurately aligned, spaced as shown on the Plans, and placed to the full depth indicated. The space around the posts shall be backfilled with suitable material in 6 inch layers and tamped thoroughly with air or mechanical tampers.