811 709.46 -STEEL POSTS, POST BRACES AND GATE FRAMES FOR RIGHT -OF-WAY FENCE : Unless otherwise specified, all right -of-way fence posts, post braces and grate frames shall meet the requirements of AASHTO M 181. Either Grade 1 or Grade 2 may be used unless one is specifically called for in the contract. Pipe members shall have the dimensions and weights called for on the plans. Studded tee posts used as line posts for farm -field fence shall conform to the requirements of either AASHTO M 281 / ASTM A702 or ASTM A499 and coated to meet the requirements of AASHTO M 111 unless otherwise directed on project plans.
709.47 : Blank
709.48 Cadmium Coated Materials :
Cadmium coated (electrodeposited) steel articles, steel hardware, nuts, bolts, etc. shall meet the requirements of ASTM B766.
709.49 Sheet Lead :
Sheet lead shall conform to the requirements of ASTM B29.
709.50 Steel Pile Points :
Steel pile points may be either ASTM A27 Grade 65/35 cast steel or ASTM A148 Grade 90/60. Pile points will be approved by the Materials Control, Soil and Testing Division.
709.51 Surface Mount Sign Support Brea Kaway Devices :
Surface Mount Sign Support Breakaway Devices shall be designed for use with 2 -lb/ft and/or 3 -lb/ft u -channel supports shown on Standard Details Book Volume II (Standard Deta ils) sheets TE1 -7A and TE1 -7B, and/or 2” x 14 -gauge Square Tube Supports as described in Section 657. The purpose of the device shall be to create an omni -directional breakaway, low maintenance support installation on asphalt and concrete surfaces which do es not require any portion of the support to be installed below grade. The device shall be designed for use with one or more of the support types/sizes specified above. Differences in the dimensioning of components used with each type/size support is permi ssible. The device shall be designed and tested to meet the following requirements:
i.Withstand loading which meets or exceeds that which will be generated based on the Support Size Selection Chart on Sheet TE1 -7A, as well as cyclical loading, without failure. ii. Shall be compatible with one or more of the u -channel supports listed on the Div ision Approved Products List (APL) for U -Channel Posts, and/or square tube support which meet the requirements of Section 709.55. iii. Shall be designed to be surface mounted on both asphalt and concrete surfaces of nominal minimum thickness. Concrete foundatio ns shall not be required. iv. Components shall be manufactured using aluminum, stainless steel, galvanized steel, exterior grade epoxy coated steel, or similar material exhibiting weather resistance equal to or greater than those described.
v.Shall not require modification of the support for installation. vi. Shall be designed to be anchored to the surface and shall not require saw cutting, jackhammering, etc. of the asphalt or concrete. 812 vii. Shall be acceptable for use with supports of the types/sizes that the device is approved for use with regardless of the number of supports. The manufacturer may limit the number of supports within a seven (7) foot path when the device is used. However, a minimum of two supports shall be permissible within a seven ( 7) foot path. viii. Allows the support to break away when impacted from any angle. ix. Minimizes the risk to pedestrians during and after impacts by not incorporating components which become independent projectiles, or which become potentially hazardous shards projecting above grade.
x.No component not designed to breakaway or yield upon impact shall project more than four ( 4)-inches above the surface, providing the device is installed flush to the surface in accordance with the manufacturer’s specifications. xi. May require the repl acement of a portion of, or up to all of the system components after impact; however, repair or replacement after impacts shall not be time consuming or labor intensive. The required use of power equipment or expensive, highly specialized equipment to remo ve damaged components and/or to complete repairs, including instances where the device has been impacted directly by a vehicle tire or undercarriage, shall be unacceptable. xii. Shall be “crashworthy” when utilized and installed in accordance with the manufactu rer’s specifications such as brand supports, maximum number of supports within a seven ( 7) foot path, etc., and with traffic signs securely mounted to the supports in accordance with the mounting height guidelines provided on Sheet TP3 - 1A of the Standard D etails. “Crashworthy”, as specified herein, shall be defined as compliance with the crash testing requirements of the AASHTO Manual for Assessing Safety Hardware (MASH) at Test Levels I, II, and III. Mandatory guidelines applying to the device such as , but not limited to, the type/size supports it is permitted to be used with, brand supports it is permitted to be used with, and the maximum number of supports permitted within a seven (7) foot path when the device is used, shall be noted on the APL. The manufacturer shall supply installation instructions and all required components and hardware to the Contractor. This shall include a complete anchoring system to secure the device to the asphalt or concrete surface. The manufacturer shall make available d evice installation instructions for posting and dissemination by the Division to inspection and maintenance personnel.
709.51.1 Product Submission and Approval: Surface Mount Breakaway Devices to be
considered for inclusion on the Division Roadside Sign Support Accessories APL shall be submitted to the Materials Division following the current procedures specified by the Division in MP 106.00.02. The manufacturer should include all relevant documentation and information, including but not limited to Product Data Sheets, Product Flyers, Manufacturer Product Specifications, Product Bulletins, Engineering Drawings, and crash testing performance documentation. The cras h testing performance documentation to be submitted shall be in accordance with official guidance issued by the WVDOH. In addition to the above, field evaluation installations shall be required prior to approval. In order for the device to be approved, evaluation installations installed by or for the Division shall demonstrate levels of durability, reliability, performance, and ease of installation/repair determined to be acceptable to Division evaluation personnel. The duration of the field 813 evaluations shall typically be a minimum of six months to one year. Specific details related to this testing, such as locations and quantities, shall be determined by the Division. Initial and typical repair material costs associated with the device shall also be cons idered as part of the evaluation.
709.52 Steel Beam Sign Support Omni -Directional Breakaway Device :
Steel Beam Sign Support Omni -Directional Breakaway Devices shall be desig ned for use with Steel Beam roadside sign supports shown on Standard Detail Book Volume II (Standard Details) sheets TE1 -3A, TE1 -3B, and TE1 -3C. The purpose of the device shall be to transform the bi-directional slip base breakaway mechanism of Steel Beam supports into an omni -directional breakaway connection. The device may be designed for use with one or more of the standard size Steel Beam supports shown in the Standard Details. The device shall be designed and tested to meet the following requirements :
i.Withstand loading which meets or exceeds that which will be generated based on the Support Size Selection Chart on Sheet TE1 -3B, as well as cyclical loading, without failure. ii. Components shall be manufactured using aluminum, stainless steel, galvanized steel, exterior grade epoxy coated steel, or similar material exhibiting weather resistance equal to or greater than those described. iii. Other than elimination of the keeper plate and/or elimination of the standard connection hardware between the support base plate and the stub post base plate, the device shall require no modifications to the design of the support. This shall include the stub post and the support hinge plates. iv. Shall be acceptable for use with supports of the sizes that the device is approved f or use with regardless of the number of supports connected by the sign(s) or bracing above the hinge plates. However, the manufacturer may limit the number of supports within a seven
7.foot width when the device is used. However, in order to be approved for use with S4x7.7 or W6x12 supports, a minimum of two supports within a seven ( 7) foot path shall be permissible.
v.Allow the support to break away from the stub support when impacted from any angle. vi. Minimizes the risk to pedestrians during and after impa cts by not incorporating components which become independent projectiles, or which become potentially hazardous shards projecting above grade. vii. No component not designed to breakaway or yield upon impact shall project more than ½ inch above the top of the support stub. viii. May require the replacement of a portion of, or up to all of the system components after impact; however, repair or replacement after impacts shall not be time consuming or labor intensive. The required use of power equipment or expensive, h ighly specialized equipment to remove damaged components and/or to complete repairs, including instances where the device has been impacted directly by a vehicle tire or undercarriage, shall be unacceptable. ix. Shall not affect the support’s compliance with t he crash testing requirements of the AASHTO Manual for Assessing Safety Hardware (MASH) at Test Levels I, II, and III for projects. This shall be demonstrable by crash testing performance documentation as described herein. Mandatory guidelines applying to the device such as, but not limited to, the size supports it is permitted to be used with and the maximum number of supports permitted within a seven ( 7) foot span when the device is used, shall be noted on the Approved Products List (APL). The manufa cturer shall supply installation instructions and all required components and
Source: West Virginia Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 833–835 of 1,006.