909.01 956 SECTION 909 – FENCE, GUARD RAIL AND BARRIER
909.01 Stock Fence ................................ ................................ .................. 956
909.02 Chain Link Fence ................................ ................................ ......... 958
909.03 Fence Gates ................................ ................................ .................. 962
909.04 Wate r Gates and Water Crossings ................................ ................ 964
909.05 Metal Beam Rail ................................ ................................ .......... 964
909.06 Timber Rail ................................ ................................ .................. 964
909.07 Guard Rail Posts ................................ ................................ ........... 964
909.08 Guard Rail Hardware ................................ ................................ ... 964
909.01 Stock Fence
Unless otherwise specified, the Contractor may choose the type and kind of line post to use, whether wood or steel, and the finish, whether painted or galvanized. Do not change from using one type or kind to the other without the Engineer’s written permission. Provide corner posts, end posts, braced line posts, and all fittings and accessories of the same kind and finish as the line post.
A.Fabric Unless otherwise specified, provide fabric conforming to one of the following:
1.Galvanized steel woven wire meeting ASTM A116 for No. 11 Farm Design No. 1047 -6-11, Class III Coating, or
2.Galvanized high tensile strength steel woven wire meeting ASTM A116 for No. 12 -1/2 Farm Design, Class III Coating, except that the top and bottom strand shall be 10 -1/2 gauge and the yield strength shall be equivalent to No. 1 1 Farm Design No. 1047-6-11.
B.Steel Posts and Braces Provide one of the following types of steel line posts, of the lengths shown on the Plans: 909.01 957 1. Studded Tee posts, weighing 1.33 pounds per foot.
2.Lug-U posts, weighing 1.33 pounds per foot. Furnish each post with a standard anchor plate securely attached to the post. Provide the following types of end, corner, and braced line posts, of the lengths shown on the Plans:
1.2-1/2 x 2-1/2 x 1/4 inch angle steel, weighing 4.10 pounds per foot. The braces shall be 2 x 2 x 1/4 inch angle, weighing 3.19 pounds per foot.
2.2.0-inch (2.375 outside diameter ), standard steel black or galvanized pipe, or 2.0 inch (2.375 outside diameter), triple coated steel pipe, with a 0.130 -inch minimum wall thickness and coated as specified in 909.02. Construct the braces of 1.25 - inch (1.660 outside diameter) standard ste el black or galvanized pipe or 1.25 inch (1.660 outside diameter) triple coated steel pipe with a 0.111 -inch minimum wall thickness and coated as specified in 909.02. Furnish the round end, corner, and braced line posts complete with ball caps and other ne cessary fittings. Furnish galvanized round posts and braces that are galvanized inside and outside in accordance with ASTM F1083. Galvanize, in accordance with ASTM A123, all steel line posts and steel angle for end, corner, and braced line posts, and bra ces. Provide round posts at all corners that vary from 90 degrees.
C.Wood Posts and Braces Provide wood posts, braces, and anchors of southern pine, oak, Douglas fir, or gum. Cut wood from sound and live trees to the dimensions and shapes shown on the Plans or as otherwise designated. Ensure that the wood contains no unsound knots. Sound knots are allowable, provided the diameter of the knot does not exceed one -third of the diameter of the piece at the point where it occurs. Trim all knots smooth with the face of the timber. The posts shall be free of decayed wood, rot, and ring shake. 909.02 958 The Plans show post and brace sizes in inches. The size refers to the diameter for round pieces and to the edge dimension for square pieces. The Engineer will allow a tolerance from the dimensions shown on the Plans of 1/4 inch for sawed pieces and 1/2 inch for round pieces. A tolerance of 2% will be allowed in the length of both round and sawed posts. Saw the ends square, unless otherwise specified. Peel round posts, braces, and anchors to remove all bark and inner skin. Provide timbers having a uniform taper with a slope not greater than 1 1/2 inches in 10 feet. The alignment shall be such that when a line is drawn from the center of the tip to the center of the bu tt, it shall not fall outside the center of the timber by more than 1% of the length. Saw sawed posts, braces, and anchors with parallel edges and to not vary more than 1/4 inch from the specified dimensions, except that wane (lack of wood) not exceeding 1 /8 of the dimensions of the face and 1/4 of the length of the piece on one corner or the equivalent on two or more corners will be permitted on not more than 10% of the pieces. Treat posts, braces, and anchors with a preservative treatment, conforming to 911.02. All preservatives must be registered with the
U.S.EPA under FIFRA. Fabricate or frame the timbers before treatment.
D.Barbed Wire Provide either galvanized or aluminum -coated barbed wire consisting of two No. 12 -1/2 gauge twisted steel line wires with No. 14 gauge 4 -point barbs spaced not more than 5 inches apart. The galvanized wire shall meet ASTM A121, chain link fence grade. The Contractor may use high tensile strength wire , meeting the requirements of ASTM A121, chain link fe nce grade , for the respective wire size, with barb spacings as designated above.
909.02 Chain Link Fence
Unless otherwise specified, provide one of the following kinds of chain link fence fabric:
1.Zinc coated steel,
2.Aluminum coated steel, or
3.Aluminum alloy. 909.02 959 Do not change from using one kind of fabric to another without the Engineer’s written permission.
A.Fabric Provide fabric of the chain link type, conforming to AASHTO M 181. If galvanized, the fabric shall be of Type I, Class D. Manufacture all chain link fabric of No. 9 gauge wire pickets, forming a uniform 2 -inch mesh, and to be of the height shown on the Plans or specified in the Contract.
B.Posts and Braces
1.Description. Manufacture the pipe by cold rolling and electric resistance welding of steel strip conforming to ASTM A1011, ASTM A1008 and A1011 , or ASTM A653, Grade D. Provide corrosion protection to all tubing by in-line application of hot-dip galvanizing, followed by a chromate conversion coating and an electrostatically applied clear acrylic or polyester coating on the outside surface. Provide corrosion protection to t he inside surface by hot-dip galvanizing or in-line application of a zinc rich paint after fabrication.
2.Protective Coatings
a.External
i.Apply hot -dipped zinc coating according to ASTM B6 high grade and special high grade. The weight of the hot-dipped zinc coating shall be a minimum of 0.8 ounces per square foot, as determined in accordance with ASTM A90. ii. Provide an electrostatically applied clear acrylic or polyester coating thickness of at least 0.1 mils.
b.Internal. Hot-dip galvanize the interior surface with a minimum of 0.9 ounce of zinc, or apply a 0.3 -mil thickness of zinc rich paint after welding. Use a coating having at least 80% zinc powder by weight and that is capable of providing galvanic protection. Provide posts and braces conforming to one of the types specified in Table 909.02-1. 909.02 960 Table 909.02 -1: Post and Braces Application Material ASTM Specification Nominal Diameter (inches) Outside Diameter (inches) Line Posts Galvanized steel pipe F1083 1.5 1.900 Aluminum alloy standard (ANSI Schedule 40) pipe B429, Alloy 6063, Temper T6 1.5 1.900 Triple coated steel pipe with a 0.1 20-inch wall thickness F1043, Group I-C 1.5 1.900 End, Corner, and Pull Posts Galvanized standard steel pipe F1083 2.0 2.375 Aluminum alloy standard (ANSI Schedule 40) pipe B429, Alloy 6063, Temper T6 2.0 2.375 Triple coated steel pipe with a 0.130 -inch wall thickness F1043, Group I-C 2.0 2.375 End and Corner Braces Galvanized standard steel pipe F1083 1.25 1.660 Aluminum alloy standard (ANSI Schedule 40) pipe B429, Alloy 6063, Temper T6 (for corner posts: B241) 1.25 1.660 Triple coated steel pipe with a 0.111 -inch wall thickness F1043, Group I-C 1.25 1.660
C.Top Rail Provide top rail conforming to one of the types specified in Table
909.02 2.
909.02 961 Table 909.02 -2: Top Rail Material Specification Nominal Diameter (inches) Outside Diameter (inches) Galvanized standard steel pipe ASTM F1083 1.25 1.660 Aluminum alloy standard (ANSI Schedule 40) ASTM B429, Alloy 6063, Temper T6 1.25 1.660 Triple coated steel pipe with a 0.111-inch minimum wall thickness ASTM F1043, Group I-C 1.25 1.660
D.Barbed Wire
1.Steel. Provide steel barbed wire meeting 909.01.D.
2.Aluminum Alloy. Provide aluminum alloy barbed wire consisting of two twisted strands of 0.110 -inch line wire with 0.080 -inch diameter 4 -point barbs spaced not more than 5 inches apart. Use ASTM B211 alloys of 5052-0 for the wire and 5052 -H38 for the barbs.
E.Miscellaneous Fittings and Hardware
1.Steel. Provide zinc -coated miscellaneous fittings and hardware of commercial grade steel or better quality, pressed, wrought, or cast as appropriate to the article, and of sufficient strength and other properties to provide a balanced design when used in conjunction with fabric, posts, and wires of the quality specified herein. Galvanize all ste el fittings and hardware in accordance with AASHTO M 111.
2.Aluminum Alloy. Provide aluminum alloy miscellaneous fittings and hardware of wrought or cast aluminum conforming to AASHTO M 181, Table I. 909.03 962 F. Wire Ties Provide No. 9 gauge wire ties of zinc -coated steel, aluminum -coated steel, or aluminum alloy, of sufficient strength and other properties to provide a balanced design when used in conjunction with fabric, posts, and wire of the qualities specified herein.
G.Tension Wire Provide tension wire meeting AASHTO M 181.
H.Truss Rods and Turnbuckle Provide truss rods, 5/16 inch in diameter and equipped with a turnbuckle having a take -up of not less than 4 inches. Galvanize rods in accordance with AASHTO M 111.
I.Polyvinyl Chloride Chain Link Fence Fabricate all posts, fabric and other hardware out of steel meeting the dimensional and material requirements specif ied herein and coated in accordance with AASHTO M 181, Type IV, Class B. Fit posts with ornamental tops or extension arms as shown on the Plans. Ornamental tops for tubular posts shall have a base fitting into the post with a flange extending over the top of the posts to protect the post against moisture. Extension arms shall be vertical or extend in or out from the fence line at approximately 45 degrees as shown on the Plans. Provide suitable notches or slots in the extension arms to support and spac e the barbed wire. All materials shall be within reasonably close conformity to the sizes, shapes, dimensions, and other factors set out in these Specifications or shown on the Plans, and shall show careful, finished workmanship.
909.03 Fence Gates
Provide swing -type fence gates of the kinds and sizes shown on the Plans, complete with latches, stops, keepers, hinges, and fabric. Provide latches that allow for fastening with a padlock. Cover the gates with fabric matchi ng the fence. Provide hinges of adequate strength to support the gate and to not twist or turn under action of the gate. Provide gates, gate posts, and braces of the 909.03 963 same kind and finish as the adjoining fence. Furnish all gate posts and rails complete with ball caps and rail ends.
A.Stock Fence Gates Provide the following for stock fence gates:
1.Posts and braces of standard weight steel pipe conforming to ASTM F1083 , or triple coated steel pipe meeting 909.02.B, furnished with all necessary fittings and of the nominal diameter and length shown on the Plans for the particular gate opening.
2.Gate frames of the type and size specified, constructed in accordance with the details and of the materials shown on the Plans.
3.Fabric of the woven wire type meet ing ASTM A116, Class II coating, and of the design shown on the Plans.
4.Barbed wire meet ing the requirements of 909.01.D, and attached to the gate frame as shown on the Plans.
5.Fittings of approved design, made of malleable iron or pressed steel. Galvanize all gate frames, posts, braces , and fittings in accordance with ASTM F1083 or ASTM A123, as applicable.
B.Chain Link Fence Gates Provide the following for chain link fence gates:
1.Posts, braces, and framing members of stan dard weight pipe meeting 909.02.B. The size and length of the posts and braces and the size and dimensions of framing members shall be as shown on the Plans.
2.Fabric of the chain -link type, meeting 909.02.A. The height of the fabric shall be that shown on the Plans.
3.Barbed wire meeting the requirements of 909.02.D. 909.04 964 4. Miscellaneous fittings and accessories meeting the applicable requirements of 909.02.E, F, and G, including hinges that will allow the gate to swing back 180 degrees, parallel with the fence line.
909.04 Water Gates and Water Crossings
Provide posts, braces, and accessories of the types, kinds, and dim ensions shown on the Plans or directed by the Engineer, and that meet the applicable quality requirements of 909.01 or 909.02. Provide timber for water gates of the dimensions shown on the Plans or directed by the Engineer, and that meet the requirements o f 911.02.
909.05 Metal Beam Rail
Provide rail elements of corrugated sheet steel beams conforming to AASHTO M 180, with the following exceptions:
1.Galvanize the beams.
2.Provide the class and type of rail shown on the Plans.
909.06 Timber Rail
Provide timber rail having the dimensions shown on the Plans and meeting the requirements of 911.01. Provide treated timber, when specified, conforming to 911.02.
909.07 Guard Rail Posts
Provide railing posts of the section, weight, and length shown on the Plans. The posts may be made of wood, conforming to 911.02, or steel, conforming to ASTM A36 and galvanized in accordance with ASTM A123.
909.08 Guard Rail Hardware
Provide offset brackets of the resilient and non -resilient types of the type specified. 909.08 965 Provide splices and end connections of the type and design specified a nd of such strength as to develop the full design strength of the rail elements. Provide end spring assemblies, when specified, that are positive and of a type and design conforming to the intent, design, and strength of the railing structure, as shown on the Plans. Provide end anchor rods and accessories as specified and of such size and strength as to develop the full design strength of the rail elements. Unless otherwise specified, galvanize all steel fittings, bolts, washers, and other accessories in ac cordance with AASHTO M 111 or ASTM A153, whichever may apply. Perform all galvanizing after fabrication. Mechanically applied zinc coating conforming to ASTM B695 and meeting Class 50 coating thickness is an acceptable alternate for the hot -dipped galvanizing specified in AASHTO M 232. Provide aluminum alloy fittings, bolts, washers, and other accessories as shown on the Plans. 910.01 966 SECTION 910 – PAINT
910.01 General Requirements ................................ ................................ .. 966
910.02 Quick Dry Traffic Marking Paint (White and Yellow) ................ 966
910.03 Structural Steel Coatings ................................ .............................. 970
910.01 General Requirements
Before having any paint manufactured under these Specifications, contact the Department for a sampling, testing , and inspection procedure. Proportion a ll paint furnished under these Specifications in accordance with the characteristics specified herein. Perform c ompounding using ingredients or component materials that have been found to conform with the appropriate detailed Specifications as set forth b elow by reference or otherwise. Provide p aint that will not compact on settling and will readily return to a smooth, uniform consistency for brushing or spraying when stirred vigorously with suitable paddles or when boxed from container to container. The Contractor may use 55 -gallon drums, equipped with efficient mechanical stirring devices, to deliver shop coat paint to fabricating shops that are equipped to handle them. With the Department’s written authorization, the Contractor may also use 55 -gallon drums equipped with stirring devices to deliver paints to projects requiring large quantities. In all other cases, deliver lots of 5 gallons or more in 5 -gallon circular type metal pails constructed of 26 gauge or heavier metal. Equip each container with a full-top removable and replaceable lid and with a bail of sufficient strength to support the pail when completely filled with the specified paint. Label each container with the name and address of the manufacturer, the kind and color of paint, formula, n et content of container, date of manufacture , and lot number. Have paint that has been stored for longer than 6 months re-inspected and approved prior to use.
910.02 Quick Dry Traffic Marking Paint (White and Yellow)
The following requirements apply to quick dry white and yellow traffic paint, also referred to as pigmented binder, for use in marking traffic lanes or barrier lines on bituminous and concrete highways.
Source: Tennessee Standard Specifications for Road and Bridge Construction, 2021 Edition. Pages 965–974 of 1,072.