620.01 550 ITEM 620 DELINEATORS
620.01 Description
620.02 Materials
620.03 Layout
620.04 Removal
620.05 Installation
620.06 Method of Measurement
620.07 Basis of Payment
620.01 Description. This work consists of furnishing and installing delineators,
removing existing delineators for disposal, and restoring the surface where delineators are removed.
620.02 Materials. Furnish materials conforming to:
Reflectors ................................ ............................... 720.01 Posts, flexible ................................ ......................... 720.03 Steel hardware ................................ ........................ 730.08 Brackets ................................ ................................ .. 730.09 Stainless steel hardware ................................ ......... 730.10 Aluminum hardware ................................ ............... 730.17 Reflective sheeting ................................ . 730.192, 730.193 Delineators consist of reflectors mounted on flexible posts or brackets. Reflectors are reflective sheeting adhered to either a flexible post or an aluminum plate. The colors of reflectors of each type are: Type C White Type D Yellow Type E Red Delineator reflector and flexible post color shall matc h that of the nearest edge line.
620.03 Layout. Lay out all delineator locations to ensure their proper
placement. The Engineer will approve the layout before installation is started.
620.04 Removal. Remove delineators, including reflectors, posts, bracke ts, and
miscellaneous hardware. The delineator becomes the property of the Contractor . Remove and dispose of concrete for delineator post embedment. Restore surfaces where delineator posts or concrete for embedment are removed.
620.05 Installation. Instal l delineators facing traffic, except install red
reflectors facing wrong -way traffic. Do not remove the protective paper covering the face of flexible post -mounted reflectors until after installation. Ensure that posts are not more than 1:50 out of plumb. If soil conditions may cause the post to be out of plumb, the Contractor may drive a pilot shaft before installation. Install flexible posts using methods and equipment that conform to the post manufacturer’s recommendations. 620.06 551 620.06 Method of Measurement . The Department will measure Delineator by the number, including reflectors, supports and hardware, in place, completed and accepted. The Department will measure Removal of Delineator, by the number.
620.07 Basis of Payment . The Department will pay for acce pted quantities at
the contract prices as follows: Item Unit Description 620 Each Delineator 620 Each Removal of Delineator ITEM 621 RAISED PAVEMENT MARK ERS (RPM)
621.01 Description
621.02 Materials
621.03 Layout
621.04 Installation RPM Casting
621.05 Installation RPM Retroreflector
621.06 Reflector Replacement
621.07 Reflector Color
621.08 Raised Pavement Markers Removed
621.09 Method of Measurement
621.10 Basis of Payment
621.01 Description . This work consists of preparing the pavement and
furnishing and placing plowable raised pavement marker castings (RPMs) and prismatic retroreflectors, and removing existing RPMs for disposal.
621.02 Materials. Furnish materials conforming to :
Castings ................................ ................................ .. 721.01 Prismatic Retroreflectors and Adhesive .................. 721.02 Casting adhesive ................................ ..................... 721.03
621.03 Layout. Before placing RPMs, lay out the location of all RPMs. Locate
RPMs within 5 percent of specified spacing. Do not place RPMs under the following conditions:
A.On pavement surfaces with cracking, spalling, or failure of underlying base material.
B.Within 1 foot (0.3 m) of active signal detector loop wires. Exercise care to ensure that detector lead -in cables are not cut.
C.Over pavement markings except with the Engineer’s approval.
D.Closer than 2 inches (50 mm) to a p avement construction (transverse or longitudinal) joint or within an intersection.
E.Within 3 feet (1 m) of a bridge expansion joint. 621.04 552 If the initial location of a RPM is determined to violate one of the aforementioned conditions, relocate the affected RPM longitudinally. Relocate the RPM within a distance not exceeding 25 percent of the specified RPM spacing. If necessary to relocate the RPM to a distance greater than 25 percent of the specified RPM spacing, do not install the affected RPM. RPMs along double yellow centerline are to be placed in line or on line, but no closer than 2 inches (50 mm) to a pavement construction (transverse or longitudinal) joint. RPMs installed along a channelizing line are to be placed no more than 1 inch (25 mm) from the edge of the painted line and no closer than 2 inches (50 mm) to a pavement construction (transverse or longitudinal) joint. Place the RPMs installed along a lane line or dashed yellow centerline between and in line with the dashes no closer than 2 inches ( 50 mm) to a pavement construction (transverse or longitudinal) joint. Install replacement RPMs within 3 feet (0.9 m) longitudinally of the damaged or missing RPM.
621.04 Installation RPM Casting. Cut parallel slots with 1/16 to 1/8 inch (1.5
to 3 mm) clear ance on each side for installing RPM castings. Pavement cuts should be inspected prior to adding casting adhesive. When a casting is inserted in the cut without casting adhesive to test proper cut, at least 3 of the 4 leveling lugs/tabs must contact the p avement surface and all four keel-ends of castings must be below the pavement surface. Each casting must be centered lengthwise and should have 1/16 to 1/8 inch (1.5 to 3 mm) clearance between pavement cut and casting for casting adhesive to bond properly. Only the leveling lugs/tabs should be in contact with the pavement surface after insertion of casting in pavement so that a minimum of 1/16 inch (1.5 mm) of casting adhesive is the bonding adhesive between the casting and pavement. The casting adhesive mu st fill all voids. The pavement cut must be completely dry and free of dust, dirt or any other material that will interfere with the adhesive bond to the casting and the pavement. Casting adhesive on the active reflector face must be removed immediately. Install the RPM casting within 24 hours after cutting the slots into the pavement. On new pavement surfaces, the Contractor may begin RPM placement as soon as the pavement markings for that section are completed and dry. Ensure that the RPM casting is free of dirt, dust, oil, grease, rust, moisture, or any foreign matter that impairs adhesion to the pavement. Place RPMs when the pavement surface temperature and the ambient air temperature are at least 40 F (5 C) and the pavement is dry. Heat both parts of the RPM casting adhesive to 100 10 F (38 5 C) during installation when either the pavement surface or ambient air temperature is between 40 and 50 F (5 and 10 C). 621.05 553 Ambient Air Temperature Minimum Period Protected from Traffic F (C) Minutes 100 (38) 15 90 (32) 20 80 (27) 25 70 (21) 30 60 (16) 35 50 (10) 45 40 (5) 60 Do not allow traffic on the RPMs until the adhesive has cured. Two component approved casting adhesive is used to fill the pavement cut to within approximately 3/8 inch (9 mm) of the top of the pavement cut. A minimum of 3 of the 4 leveling lugs/tabs must be in contact with the pavement surface and the casting adhesive should ooze out from under the casting from all sides filling all voids around the casting and be level with the pavement surface. Mix the casting adhesive according to the manufacturer’s recommendations. Complete the mixing operation and placing of the RPMs rapidly. Do not use any mixed batch that becomes so viscous that it cannot be readily extruded from under the RPM with light pressure.
621.05 Installation RPM Retroreflector. Attach the reflector to the casting
before installation or after the adhesive in the pavement slots has cured. Remove all dirt, dust, oil, grease, rust, moisture, parts of damaged reflec tors, or any foreign matter that impairs adhesion of the reflector to the casting. Peel the release liner from the back of the reflector with butyl pad. Apply a wide bead (approximately 3/8 inch (9 mm)) of reflector adhesive sufficient to squeeze out on all sides when pressure is applied to seat the reflector. Apply approximately 100 pounds (45 kg) of pressure on the reflector or foot pressure for 1 to 3 seconds. Do not allow adhesive material on the reflective surface of the reflector. Any adhesive on th e active reflector must be removed immediately. Apply the reflector when the pavement surface temperature and the ambient air temperature are at least 35 F (2 C) and the casting surface is dry. Do not attach the reflector to the casting when rain over t he work site is imminent.
621.06 Reflector Replacement. Replace damaged, non -retroreflective, or
missing reflectors within the existing marker installations where the casting remains intact with the appropriate reflector type. The Engineer will determine t he location of replacement reflectors. Perform the cleaning and attachment procedure for replacing reflectors within existing RPM installations according to 621.05.
621.07 Reflector Color. Use the appropriate reflector color for the following
applications:
A.Channelizing Lines. White/red two -way reflectors with white facing traffic.
Source: Ohio Construction and Material Specifications, 2019 Edition. Pages 0–0 of 928.