606Guardrail

606.01 Description This work shall consist of furnishing and installing guardrail

components in accordance with these specifications and in reasonably close conformity with the lines and grades shown on the plans or as established. The types of guardrail are designated as follows: Type 3-Galvanized steel "w" beam, wood posts or galvanized steel posts. Type 3a-Galvanized steel "w" beam, wood posts, wood or composite offset blocks. Type 3aa-Corrosion resistant steel "w" beam, wood posts, wood or composite offset blocks. Type 3b-Galvanized steel "w" beam, galvanized steel posts, galvanized steel offset blocks. Type 3c-Galvanized steel "w" beam, wood posts or galvanized steel posts, wood or composite offset blocks. 6-22 Type 3d-Galvanized steel "w" beam, galvanized steel posts, wood or composite offset blocks. Thrie Beam-Galvanized steel thrie beam, wood posts or galvanized steel posts, wood or composite offset blocks. Median barriers shall consist of two beams of the above types, mounted on single posts. Except for thrie beam, median barriers may include rub rails when called for. Bridge mounted guardrail shall consist of furnishing all labor, materials, and equipment necessary to install guardrail as shown on the plans. This work shall also include drilling for and installation of offset blocks if specified, and incidental hardware necessary for satisfactory completion of the work. Remove and Reset and Remove, Modify, and Reset guardrail shall consist of removing the existing designated guardrail and resetting in a new location as shown on the plans or directed by the Resident. Remove, Modify, and Reset guardrail and Modify guardrail include the following guardrail modifications: Removing plate washers at all posts, except at anchorage assemblies as noted on the Standard Details, Adding offset blocks, and other modifications as listed in the Construction Notes or General Notes. Modifications shall conform to the guardrail Standard Details. Bridge Connection shall consist of the installation and attachment of beam guardrail to the existing bridge. This work shall consist of constructing a concrete end post or modifying an existing end post as required, furnishing, and installing a terminal connector, necessary hardware, and incidentals required to complete the work as shown on the plans. Bridge Transition shall consist of a bridge connection and furnishing and installing guardrail components as shown in the Standard Details.

606.02 Materials Materials shall meet the requirements specified in the following

Sections of Division 700 - Materials: T i m b e r P r e s e r v a t i v e 708.05 M e t a l B e a m R a i l 710.04 G u a r d r a i l P o s t s 710.07 G u a r d r a i l H a r d w a r e 710.08 Guardrail components shall meet the applicable standards of "A Guide to Standardized Highway Barrier Hardware" prepared and approved by the AASHTO-AGC-ARTBA Joint Cooperative Committee, Task Force 13 Report. Posts for underdrain delineators shall be “U” channel steel, 8 ft long, 2 ½ lb/ft minimum and have 3/8 inch round holes, 1 inch center to center for a minimum distance of 2 ft from the top of the post. Reflectorized Flexible Guardrail Markers shall be mounted on all guardrails. A marker shall be mounted onto guardrail posts at the flared end treatment’s terminal and its tangent 6-23 point, both at the leading and trailing ends of each run of guardrail. The marker’s flexible posts shall be grey with either silver-white or yellow reflectors (to match the edge line striping) at the tangents, red at leading ends, and green at trailing ends. Whenever the end treatment is not flared, markers will only be required at the end treatment’s terminal. These shall be red or green as appropriate. Markers shall be installed on the protected side of guardrail posts unless otherwise approved by the Resident. Reflectorized flexible guardrail markers shall be from the Department’s Qualified Products List of Delineators. The marker shall be grey, flexible, durable, and of a non-discoloring material to which 3 inch by 9 inch reflectors shall be applied, and capable of recovering from repeated impacts and meet MASH 16 requirements. Reflective material shall meet the requirements of Section 719.01 for ASTM D 4956 Type III reflective sheeting. The marker shall be secured to the guardrail post with two fasteners, as shown in the Standard Details. Reflectorized beam guardrail (“butterfly”-type) delineators shall be mounted on all “w”- beam guardrail. The delineators shall be mounted within the guardrail beam at guardrail posts. Delineators shall be fabricated from high-impact, ultraviolet & weather resistant thermoplastic. Reflectorized beam guardrail delineators shall be placed at approximately 62.5 ft intervals or every tenth post on tangents and at approximately 31.25 ft intervals or every fifth post on curves. Exact locations of the delineators shall be as directed by the Resident. On divided highways, the left hand delineators shall be yellow and the right hand delineators shall be silver/white. On two directional highways, the right hand side shall be silver/white and no reflectorized delineator used on the left. All reflectors shall have reflective sheeting applied to only one side of the delineator facing the direction of traffic as shown in the Standard Detail 606(07). Reflectorized sheeting for guardrail delineators shall meet the requirements of Section 719.01. Single wood post shall be of cedar, white oak, or tamarack, well-seasoned, straight, and sound and have been cut from live trees. The outer and inner bark shall be removed and all knots trimmed flush with the surface of the post. Posts shall be uniform taper and free of kinks and bends. Single steel post shall conform to the requirements of Section 710.07 b. Single steel pipe post shall be galvanized, seamless steel pipe conforming to the requirements of ASTM A120, Schedule No. 40, Standard Weight. Acceptable multiple mailbox assemblies shall be listed on the Department’s Qualified Products List and shall be MASH 16 tested and approved. The Guardrail 350 Flared Terminal shall be a terminal with a 4 ft offset as shown in the Manufacturer’s installation instructions. Existing materials damaged or lost during adjusting, removing and resetting, or removing, modifying, and resetting, shall be replaced by the Contractor without additional compensation. Existing guardrail posts and guardrail beams found to be unfit for reuse shall be replaced when directed by the Resident. 6-24

606.03 Posts Posts for guardrail shall be set plumb in holes or they may be driven if

suitable driving equipment is used to prevent battering and distorting the post. When posts are driven through pavement, the damaged area around the post shall be repaired with approved bituminous patching. Damage to lighting and signal conduit and conductors shall be repaired by the Contractor. When set in holes, posts shall be on a stable foundation and the space around the posts, backfilled in layers with suitable material, thoroughly tamped. The reflectorized flexible guardrail markers shall be set plumb with the reflective surface facing the oncoming traffic. Markers shall be installed on the protected side of guardrail posts. Markers, which become bent or otherwise damaged, shall be removed and replaced with new markers. Single wood posts shall be set plumb in holes and backfilled in layers with suitable material, thoroughly tamped. The Resident will designate the elevation and shape of the top. The posts, that are not pressure treated, shall be painted two coats of good quality oil base exterior house paint. Single steel posts shall be set plumb in holes as specified for single wood posts or they may be driven if suitable driving equipment is used to prevent battering and distorting the post. Additional bolt holes required in existing posts shall be drilled or punched, but the size of the holes shall not exceed the dimensions given in the Standard Details. Metal around the holes shall be thoroughly cleaned and painted with two coats of approved aluminum rust resistant paint. Holes shall not be burned.

606.04 Rails Brackets and fittings shall be placed and fastened as shown on the plans.

Rail beams shall be erected and aligned to provide a smooth, continuous barrier. Beams shall be lapped with the exposed end away from approaching traffic. End assemblies shall be installed as shown on the plans and shall be securely attached to the rail section and end post. All bolts shall be of sufficient length to extend beyond the nuts but not more than ½ inch. Nuts shall be drawn tight. Additional bolt holes required in existing beams shall be drilled or punched, but the size of the holes shall not exceed the dimensions given in the Standard Details. Metal around the holes shall be thoroughly cleaned and painted with two coats of approved aluminum rust resistant paint. Holes shall not be burned. 606.045 Offset Blocks The same offset block material is to be provided for the entire project unless otherwise specified. 6-25

606.05 Shoulder Widening At designated locations the existing shoulder of the roadway

shall be widened as shown on the plans. All grading, paving, seeding, and other necessary work shall be in accordance with the Specifications for the type work being done.

606.06 Mail Box Post Single wood post shall be installed at the designated location for

the support of the mailbox. The multiple mailbox assemblies shall be installed at the designated location in accordance with the Standard Details and as recommended by the Manufacturer. Attachment of the mailbox to the post will be the responsibility of the home or business owner.

606.07 Abraded Surfaces All galvanized surfaces of new guardrail and posts, which

have been abraded so that the base metal is exposed, and the threaded portions of all fittings and fasteners and cut ends of bolts shall be cleaned and painted with two coats of approved rust resistant paint.

606.08 Method of Measurement Guardrail will be measured by the linear foot from

center to center of end posts along the gradient of the rail except where end connections are made to masonry or steel structures, in which case measurement will be as shown on the plans. Terminal section, low volume end, MASH 16 end treatments, reflectorized flexible guardrail marker, terminal end, bridge transition, bridge connection, multiple mailbox post, and single post will be measured by each unit of the kind specified and installed. W-Beam guardrail terminal ends and guardrail offset blocks shall be from the Department’s Qualified Products Lists. Widened shoulder will be measured as a unit of grading within the limits shown on the plans. Excavation in solid rock for placement of posts will be paid under force account unless otherwise indicated in the Bid Documents.

606.09 Basis of Payment The accepted quantities of guardrail will be paid for at the

contract unit price per linear foot for the type specified, complete in place. Reflectorized beam guardrail (“butterfly”-type) delineators will not be paid for directly, but will be considered incidental to guardrail items. Terminal section, buffer end, NCHRP 350 end treatment, bridge connection, single post and reflectorized flexible guardrail markers will be paid for at the contract unit price each for the kind specified complete in place. NCHRP 350 end treatments and low volume guardrail ends will be paid for at the contract price each, complete in place which price shall be full payment for furnishing and installing all components including the terminal section, posts, offset blocks, "w" beam, cable foundation posts, plates and for all incidentals necessary to complete the installation within the limits as shown on the Standard Details or the Manufacturer’s installation 6-26 instructions. Each end treatment will be clearly marked with the manufacturers name and model number to facilitate any future needed repair. Such payment shall also be full compensation for furnishing all material, excavating, backfilling holes, assembling, and all incidentals necessary to complete the work, except that for excavation for posts or anchorages in solid ledge rock, payment will be made under 109.7.5 – Force Account. Type III Retroreflective Adhesive Sheeting shall be applied to the approach buffer end sections and sized to substantially cover the end section. On all roadways, the ends shall be marked with alternating black and retroreflective yellow stripes. The stripes shall be 3 in wide and sloped down at an angle of 45 degrees toward the side on which traffic is to pass the end section. Guardrail 350 flared terminal shall also include a set of installation drawings supplied to the Resident. Anchorages to bridge end posts will be part of the bridge work. Connections thereto will be considered included in the unit bid price for guardrail. Guardrail to be placed on a radius of curvature of 150 ft or less will be paid for under the designated radius pay item for the type guardrail being placed. Widened shoulder will be paid for at the contract unit price each complete in place and will be full compensation for furnishing and placing, grading and compaction of aggregate subbase and any required fill material. Adjust guardrail will be paid for at the contract unit price per linear foot and will be full compensation for adjusting to grade. Payment shall also include adjusting terminal end treatments where required. Modify guardrail will be paid for at the contract unit price per linear foot and will be full compensation for furnishing and installing offset blocks, additional posts, and other specified modifications; removing, modifying, installing, and adjusting to grade existing posts and beams; removing plate washers and backup plates, and all incidentals necessary to complete the work. Payment shall also include removing and resetting terminal ends where required. Remove and Reset guardrail will be paid for at the contract unit price per linear foot and will be full compensation for removing, transporting, storing, reassembling all parts, necessary cutting, furnishing new parts when necessary, reinstalling at the new location, and all other incidentals necessary to complete the work. Payment shall also include removing and resetting terminal ends when required. Remove, Modify, and Reset guardrail will be paid for at the contract unit price per foot and will be full compensation for the requirements listed in Modify guardrail and Remove and Reset guardrail. Bridge Connections will be paid for at the contract unit price each. Payment shall include, attaching the connection to the endpost including furnishing and placing concrete and reinforcing steel necessary to construct new endposts if required, furnishing and 6-27 installing the terminal connector, and all miscellaneous hardware, labor, equipment, and incidentals necessary to complete the work. Bridge Transitions will be paid for at the contract unit price each. Payment shall include furnishing and installing the thrie beam or “w”-beam terminal connector, doubled beam section, and transition section, where called for, posts, hardware, precast concrete transition curb, and any other necessary materials and labor, including the bridge connection as stated in the previous paragraph. No payment will be made for guardrail removed, but not reset and all costs for such removal shall be considered incidental to the various contract pay items. Payment will be made under: P a y I t e m Pay Unit

606.15 Guardrail Type 3a-Single Rail Linear Foot

606.151 Guardrail Type 3aa-Single Rail Linear Foot

606.17 Guardrail Type 3b-Single Rail Linear Foot

606.1721 Bridge Transition - Type I Each 606.1722 Bridge Transition - Type II Each 606.1731 Bridge Connection - Type I Each 606.1732 Bridge Connection - Type II Each 606.178 Guardrail Beam Linear foot

606.18 Guardrail Type 3b - Double Rail Linear foot

606.19 Guardrail Type 3a - 15 ft radius and less Linear Foot

606.191 Guardrail Type 3aa - 15 ft radius and less Linear Foot

606.20 Guardrail Type 3a - over 15 ft radius Linear Foot

606.201 Guardrail Type 3aa - over 15 ft radius Linear Foot

606.21 Guardrail Type 3b - 15 ft radius and less Linear Foot

606.22 Guardrail Type 3b - over 15 ft radius Linear Foot

606.23 Guardrail Type 3c - Single Rail Linear Foot

606.2301 Guardrail Type 3c - Double Rail Linear Foot 606.231 Guardrail Type 3c - 15 ft radius and less Linear Foot 606.232 Guardrail Type 3c - over 15 ft radius Linear Foot

606.24 Guardrail Type 3d - Single Rail Linear Foot

606.2401 Guardrail Type 3d - Double Rail Linear Foot 606.241 Guardrail Type 3d - 15 ft radius and less Linear Foot 606.242 Guardrail Type 3d - over 15 feet radius Linear Foot

606.25 Terminal Connector Each

606.257 Terminal Connector - Thrie Beam Each 606.265 Terminal End-Single Rail - Galvanized Steel Each 606.266 Terminal End-Single Rail - Corrosion Resistant Steel Each 606.275 Terminal End-Double Rail - Galvanized Steel Each 606.276 Terminal End-Double Rail - Corrosion Resistant Steel Each 6-28 606.353 Reflectorized Flexible Guardrail Marker Each 606.354 Remove and Reset Reflectorized Flexible Guardrail Marke r Each 606.356 Underdrain Delineator Post Each 606.358 Guardrail, Modify, Type 3b to 3c Linear Foot 606.3581 Guardrail, Modify Existing to Type 3d Linear Foot 606.362 Guardrail, Adjust Linear Foot 606.365 Guardrail, Remove, Modify, and Reset, Type 3b to 3c Linear Foot 606.3651 Guardrail, Remove, Modify, and Reset Existing to Type 3d Linear Foot 606.366 Guardrail, Removed and Reset, Type 3c Linear Foot 606.367 Replace Unusable Existing Guardrail Posts Each

606.47 Single Wood Post Each

606.48 Single Galvanized Steel Post Each

606.50 Single Steel Pipe Post Each

606.51 Multiple Mailbox Support Each

606.55 Guardrail Type 3 - Single Rail Linear Foot

606.551 Guardrail Type 3 - Single Rail with Rub Rail Linear Foot

606.56 Guardrail Type 3 - Double Rail Linear Foot

606.561 Guardrail Type 3 - Double Rail with Rub Rail Linear Foot 606.568 Guardrail, Modify Type 3c -Double Rail Linear Foot

606.59 Guardrail Type 3 - 15 ft radius and less Linear Foot

606.60 Guardrail Type 3 - over 15 ft radius Linear Foot

606.63 Thrie Beam Rail Beam Linear Foot

606.64 Guardrail Thrie Beam - Double Rail Linear Foot

606.65 Guardrail Thrie Beam - Single Rail Linear Foot

606.66 Terminal End Thrie Beam Each

606.70 Transition Section - Thrie Beam Each

606.71 Guardrail Thrie Beam - 15 ft radius and less Linear Foot

606.72 Guardrail Thrie Beam - over 15 ft radius Linear Foot

606.73 Guardrail Thrie Beam - Single Rail Bridge Mounted Linear Foot

606.74 Guardrail Type 3 - Single Rail Bridge Mounted Linear Foot

606.753 Widen Shoulder for Low Volume Guardrail End - Type 3 E ach 606.754 Widen Shoulder for Guardrail 350 Flared Terminal Each

606.78 Low Volume Guardrail End - Type 3 Each

606.79 Guardrail 350 Flared Terminal Each

Guardrail in other states

• Alaska 606 · GUARDRAIL
• Colorado 606 · Guardrail
• Montana 606 · Guardrail
• New Hampshire 606 · GUARDRAIL
• Arkansas 617 · GUARDRAIL
• Arizona 905 · GUARDRAIL
• Delaware 720 · GUARDRAIL