621DELINEATORS

New Hampshire Department of Transportation Standard Specifications – 2016 Description

1.1This work shall consist of furnishing and installing retroreflective delineators with or without posts as shown on the plans.

Materials

2.1Delineator posts shall be flanged channel section ste el conforming to ASTM A 36 posts, galvanized in accordance with

AASHTO M 111. The weight per foot shall be 1. 12 lb. The post shall have 3/8 ” holes drilled or punched, before galvanizi ng, at 1” on center along the center line o f the web, beginning 13/32” from the top and continuing 29” down the post. Post length shall be as shown in the NHDOT Standard Plans or as otherwise shown on the plans. 2.1.1 All deliveries of delineator post shall be accompanied by a certificate of compliance, a certified mill test report, and a detailed bill of lading.

2.2Sheet material for delineators shall be sized to the dimensions and shapes shown on the plans and shall conform to one of the

following: • Aluminum sheeting confor ming to ASTM B 209 , Alloy 6061-T6 when 0.080 ” thick or ASTM B 209 , Alloy 5052-H38 when 0.100” thick, or • Steel conforming to ASTM A 635, galvanized in accordance with AASHTO M 111 (ASTM A 123) with a minimum thickness of 12 gauge, or • For temporary conditions only, high-impact, ultra -violet resistant thermoplastic meeting the following minimum requirements: Property Test method Minimum Property Requirement Tensile Strength@ yield, psi ASTM D 638 5,000 Impact Strength @ 73 °F, Ft. lb/in notch ASTM D 256 10 Impact Strength @ -40 °F, Ft. lb/in notch ASTM D 256 1.5 Flexural strength 1/4” @ 73 °F, psi ASTM D 790 8,000 Flexural modulus1/4” @ 73 °F ASTM D 790 300,000 With a minimum thickness of 0.08”

2.3Retroreflective sheeting shall conform to AASHTO M 268 (ASTM D 4956) mini mum of Type IV sheeting, silver, white,

green, yellow, green or brown.

2.4Bolts for post mounting shall be aluminum alloy economy hexagon head m achine bolts conforming to ASTM F 468 Alloy

6061-T6 supplied with nylon washers and vandal resistant nuts. Bolts for concrete barrier mounting shall be stainless steel hexagon head machine bolt conforming to ASTM A 276 Type 304 with an expansion anchor bolt embedded in the concrete as shown on the plans. Construction Requirements

3.1Steel posts for delineators shall be installed at locations that are in accordance with the NHDOT Standard Plans or as

otherwise shown on the plans. Posts may be set or driven and shall be plumb. Bent or damaged posts shall be replaced. 3.1.1 When posts are set, holes shall be dug to the proper depth. Holes shall be backfilled with suitable material in layers not over 6” in depth and thoroughly compacted. 3.1.2 When posts are driven, a suitable driving cap shall be used. After driving, the top of the posts shall have substantially the same cross sectional dimensions as the body of the post. Posts shall not be dr iven with the assembly attached. 3.1.3 When rock is encountered in erecting posts, the depth to be drilled into the rock and any required grouting shall be determined by the Engineer.

3.2Each retroreflective delineator shall be securely bolted to posts, guardrail or barrier as required.

New Hampshire Department of Transportation Standard Specifications – 2016

Method of Measurement

4.1Delineators will be measured by the number of delineators of the type specified.

4.1.1 Retroreflective delineator faces, of the type specified will be measured by the number of faces required. Basis of Payment

5.1Delineators or retroreflective delineator faces will be paid for at the Contract unit price per each of the type specified,

complete in place. Pay items and units:

621.1Retroreflective Median Barrier Delineator Each

621.2Retroreflective Beam Guardrail Delineator Each

621.31Single Delineator with Post Each

621.32Double Delineator with Post Each

621.33Single Delineator Double Faced with Post Each

621.34Double Delineator Double Faced with Post Each

621.4Retroreflective Delineator Face Each

621.5Retroreflective Bridge Rail Delineator Each

New Hampshire Department of Transportation Standard Specifications – 2016

Description

This work shall consist of furnishing and erecting witness markers and bounds in accordance with and at the locations shown

on the plans. Materials

Witness markers shall be studded “ T” posts galvanized steel conforming to ASTM A 499. Galvanizing shall conform to

AASHTO M 111 (ASTM A 123). The post shall be 1 -3/8” wide, and 1-3/8” deep with a weight per foot of 1.33 lb. Post shall have a 5” high by 4” wide and 3/32” thick anchor plate riveted or swaged approximately 12” from the bottom. Posts shall be 7 ft. long. 2.1.1 All deliveries of witness markers shall be accompanied by a certificate of compliance, a certified mill test report, and a detailed bill of lading.

Concrete bounds shall be as shown on the plans with Concrete Class A conforming to Section 520, and reinforcing steel

conforming to Section 544.

Stone bounds shall be cut from hard and durable granite and shall be free from seams which would impair their structural

integrity; solid quartz or feldspar veins will not be cause for rejection. Dimensions shall be 4 to 8” square by not less than 4 ft. in length. The top of the bound shall be roughly perpendicular to the length of the stone and shall have a 1/2 ” drill hole at least 1/2” deep near or at the center.

Backfill shall conform to 209.2.1.2.

Construction Requirements

Witness markers shall be set plumb and firm to mark ditch line drainage structures, ends of cross culverts, ends of slope

drains and underdrains, or as ordered. Markers will not be used for pipes 36” and over. 3.1.1 Witness markers shall be installed 30” in the ground.

Concrete Bounds.

3.2.1 Bounds shall be set as ordered on the Right-of-Way lines, at the beginning and end of the project, at the beginning and end of curves, at the beginning and end of spirals, at angle points, and on tangents. The maximum distance between bounds shall be 1,000 ft. 3.2.2 The exact location for each bound will be established from reference stakes set by the Engineer, and those reference stakes shall not be removed until the position of the bound has been checked by the Engineer. 3.2.3 The excavation shall be made to sufficient depth to allow the bound to protrude above the natural ground surface 4 ” if in land to be mowed, 6” if in land not under cultivation, or 12” if in woodland. Bounds in the roadway slope shall be set to protrude not more than 6” on the low side. Bounds set in lawn areas shall be set flush with the existing ground. Bounds set in pavement areas shall be recessed approximately 1/2” from the pavement surface. The bound shall be set with the letters “ NH” to read from the road, and the backfill shall be thoroughly tamped in place. 3.2.4 Unless otherwise ordered, when rock is encountered, the bounds may be cut off as required and shall be firmly bonded to the rock as directed. 3.2.5 When a tree or heavy root is encountered in setting a bound, a steel pin at least 12 ” long and 3/4” in diameter shall be driven when ordered. The bound shall then be set at the nearest practicable location as directed.

3.3Stone Bounds.

3.3.1 Stone bounds shall be set at points shown or ordered in accordance with 3.2 except that 3.2.1 and references to letters “ NH” in 3.2.3 will not apply.

3.4Resetting.

3.4.1 Bounds to be reset shall be removed and reset without causing damage to the bounds. Method of Measurement

Witness markers, concrete bounds, and stone bounds of the type specified will be measured by the number of each installed

or reset.