6-21 complete in place. Outlet pipe for Underdrain, Type C will be paid for under Section 603 - Pipe Culverts and Storm Drains. Within and beyond the trench limits, backfill, couplings and b ands and other related items will not be paid for separately, but shall be considered included in the unit bid price for the type of underdrain being installed. Excavation will be considered incidental, except as provided i n Section 206 - Structural Excavation. No allowance for payment will be made f or excavating or material excavated beyond the horizontal dimensions shown for Underdrain , Type B or Underdrain, Type C. Payment will be made under: Pay Item P a y U n i t
605.09 6 inch Underdrain Type B Linear Foot
605.10 6 inch Underdrain Outlet L i n e a r F o o t
605.11 12 inch Underdrain Type C L i n e a r F o o t
605.12 15 inch Underdrain Type C L i n e a r F o o t
605.13 18 inch Underdrain Type C L i n e a r F o o t
605.14 21 inch Underdrain Type C L i n e a r F o o t
605.15 24 inch Underdrain Type C L i n e a r F o o t
605.17 30 inch Underdrain Type C L i n e a r F o o t
605.18 36 inch Underdrain Type C L i n e a r F o o t
SECTION 606 – GUARDRAIL
606.01 Description This work shall consist of furnishing and i nstalling guardrail
components in accordance with these specifications and in reaso nably 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 stee l posts. Type 3a-Galvanized steel "w" beam, wood posts, wood or composit e offset blocks. Type 3aa-Corrosion resistant steel "w" beam, wood posts, wood o r composite offset blocks. Type 3b-Galvanized steel "w" beam, galvanized steel posts, galv anized steel offset blocks. Type 3c-Galvanized steel "w" beam, wood posts or galvanized ste el 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 galvanize d 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 wh en called for. Bridge mounted guardrail shall consist of furnishing all labor, materials, and equipment necessary to install guardrail as shown on the plans. This wor k 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 locati on 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, Addin g offset blocks, and other modifications as listed in the Construction Notes or General No tes. Modifications shall conform to the guardrail Standard Details. Bridge Connection shall consist of the installation and attachm ent 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 ins talling a terminal connector, necessary hardware, and incidentals required to complete the wo rk as shown on the plans. Bridge Transition shall consist of a bridge connection and furn ishing and installing guardrail components as shown in the Standard Details.
606.02 Materials Materials shall meet the requirements specifi ed 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" prep ared and approved by the AASHTO-A GC-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 m inimum distance of 2 ft from the top of the post. Reflectorized Flexible Guardra il Markers shall be mounted on al l guardrails. A marker shall be mounted onto guardrail posts at the flared end treatme nt’s terminal and its tangent 6-23 point, both at the leading and trailing ends of each run of gua rdrail. The marker’s flexible posts shall be grey with either silver-white or yellow reflecto rs (to match the edge line striping) at the tangents, red at leading ends, and green at tr ailing ends. Whenever the end treatment is not flared, markers will only be required at the e nd treatment’s terminal. These shall be red or green as appropriate. Markers shall be install ed on the protected side of guardrail posts unless otherwise approved by the Resident. Ref lectorized flexible guardrail markers shall be from the Department’s Qualified Products List of Delineators. The marker shall be grey, flexible, durab le, and of a non-discoloring mate rial to which 3 inch by 9 inch reflectors shall be applied, and capable of recovering from rep eated impacts and meet MASH 16 requirements. Reflective material shall meet the requir ements 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 sha ll be mounted on all “w”- beam guardrail. The delineators shall be mounted within the gua rdrail beam at guardrail posts. Delineators shall be fabricated from high-impact, ultrav iolet & weather resistant thermoplastic. Reflectorized beam guardrail delineators shall b e placed at approximately 62.5 ft intervals or every tenth post on tangents and at approx imately 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, t he 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 fo r guardrail delineators shall meet the requirements of Section 719.01. Single wood post shall be of cedar, white oak, or tamarack, wel l-seasoned, straight, and sound and have been cut from live trees. The outer and inner b ark 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 D epartment’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 a nd resetting, or removing, modifying, and resetting, shall be replaced by the Co ntractor without additional compensation. Existing guardrail posts and guardrail beams fou nd 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 dis torting the post. When posts are driven through pavement, the damaged area around the post s hall be repaired with approved bituminous patching. Damage to lighting and signal co nduit and conductors shall be repaired by the Contractor. When set in holes, posts shall be on a stable foundation and th e 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 installe d on the protected side of guardrail posts. Markers, which become bent or otherwise damag ed, 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 e levation and shape of the top. The posts, that are not pressure treated, shall be painte d 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 drill ed or punched, but the size of the holes shall not exceed the dimensions given in the Stand ard 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 fastene d as shown on the plans.
Rail beams shall be erected and aligned to provide a smooth, co ntinuous barrier. Beams shall be lapped with the exposed end away from approaching traf fic. End assemblies shall be installed as shown on the plans and sha ll be securely attached to the rail section and end post. All bolts shall be of sufficient length to extend beyond the nu ts but not more than ½ inch. Nuts shall be drawn tight. Additional bolt holes required in existing beams shall be drill ed or punched, but the size of the holes shall not exceed the dimensions given in the Stand ard 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.