730.01 856 730 TRAFFIC SIGN AN D SUPPORT MATERIAL
730.01 Steel Tube and Pipe. Furnish steel tube and pipe according to ASTM A
53, Grade B , ASTM A 500, Grade B, or ASTM A 501, except provide tubing for truss and end frame diagonals according to 711.01. 730.015 U -Channel Posts. Furnish U -channel posts fabricated from steel into a characteristic cross -section that may be used alone or paired to form a heavier post by being bolted together back to back. Furnish posts with a uniform cross section for their full lengt h. Cut posts square to a length tolerance 1 inch (25 mm) and ensure that posts do not have ragged or sharp edges, or cracks or other imperfections affecting strength or durability. The back of the posts may be flat or contain raised longitudinal ribs. Furnish posts meeting the deflection criteria of Supplement 1075. Furnish posts manufactured from rail or billet steel according to ASTM A 499, Grade 60. Furnish posts with a nominal weight before punching or galvanizing as follows: Post Size Number Weig ht lb/ft (kg/m) Tolerances % 1 1.12 (1.7) -3.5, +10.0 2 2.00 (3) -3.5, +10.0 3 3.00 (4.5) -3.5, +10.0 Furnish posts with 3/8 -inch (10 mm) diameter holes accurately punched on the centerline spaced at 1 -inch (25 mm) centers beginning not more than 1 1/8 inches (30 mm) from the top of the post through the entire length, to allow bolting the posts back to back, without redrilling, using 5/16 -inch (8 mm) diameter bolts. Furnish posts that have been galvanized after punching according to 711.02. Furnish materials according to the Department’s QPL . 730.016 Square Posts. Furnish square posts fabricated from steel according to ASTM A 1011 with a minimum yield strength of 60,000 pounds per square inch (415 MPa), with 7/16 -inch (11 mm) diameter die -cut knock outs or open holes spaced on 1 -inch (25 mm) on the centerline of all four sides, in true alignment and opposite each other. Furnish posts with the dimensional requirements conforming to the Department’s standard drawings. Furnish posts that have been fin ished with one of the following methods:
A.Both inside and outside of the post are hot -dip galvanized according to ASTM A 653 G -235.
B.The outside of the post has a zinc coating of 0.80 ounce per square foot (244 g/m2) followed by chromate conversion coa ting and a cross -linked polyurethane acrylic coating. The inside of the post has a zinc organic coating. Furnish materials according to the Department’s QPL . 730.017 Wooden Box Beams. Furnish wooden box beams fabricated from 1/10 or 1/8 inch (2.54 or 3.18 mm) thick laminated veneers with the grain oriented parallel to the length of the finished beam and the veneers glued together in a continuous process with lap or scarf joints connec ting successive veneers in each layer staggered throughout the thickness of the beam. A 45 degree miter shall be used for 730.02 857 the corner joints. The adhesive used shall be a phenol -formaldehyde which conforms to ASTM D 2559. The beams shall be pressure trea ted with a preservative meeting AWPA Standard U1, Commodity Specification F: Composite Materials.
730.02 Steel Anchor Bolts and Nuts. Furnish anchor bolts made of steel
conforming to ASTM F1554 Grade 105, galvanized according to 711.02 at least 2 inches (50 mm) beyond the threads, with the end either bent or with a drilled and tapped steel plate. Furnish leveling nuts and anchor nuts capable of developing the full strength of the anchor bolt. Furnish materials according to the Department’s QPL .
730.03 Steel Poles and Arms. Furnish poles and arms made of steel with a
minimum yield strength of 52,000 pounds per square inch (359 MPa) an d galvanized according to 711.02. Furnish certified material according to Supplement 1093 .
730.04 Base and Arm Plates. Furnish support or pole anchor bases and arm
attachment plates fabricated from steel plate according to ASTM A 36 (A 36M) or ASTM A 57 2 (A 572M), Grade 42. Weld plates to supports, poles, or arms both inside and outside with fillet or full penetration welds equal to the wall thickness, or by AWS prequalified welding joints TC U4a -S or TC U4c -GF. The Contractor may use a cast steel base of equivalent strength. Furnish certified material according to Supplement 1093.
730.05 Handhole Covers. Furnish handhole covers for poles and overhead sign
supports made of 0.109 -inch (2.7 mm) galvanized steel or 0.125 -inch (3 mm) nominal aluminum allo y. Furnish certified material according to Supplement 1093.
730.06 Pole Caps. Furnish pole caps made of aluminum, galvanized ferrous
metal, or zinc die casting. Furnish certified material according to Supplement 1093.
730.07 Arm Caps. Furnish arm caps made of steel that cover at least 50 percent
of the end area. Furnish certified material according to Supplement 1093.
730.08 Steel Hardware. Furnish bolts 5/8 -inch (16 mm) diameter or larger
according to ASTM A 325 (A 325M). Furnish bolts and screws le ss than 5/8 -inch (16 mm) diameter according to SAE J429, Grade 5. Furnish nuts of all size, except anchor nuts and leveling nuts, according to SAE J995, Grade 2. Furnish flat washers according to ANSI B18.22.1. Furnish lock washers according to ASME B1 8.21.1. Furnish U -bolts according to ASTM A 307. Furnish all hardware that is hot -dipped galvanized according to ASTM A 153 or mechanically galvanized according to ASTM B 695, Class 50. Furnish certified material according to Supplement 1092 or 1093.
730.09 Stainless Steel. Furnish any AISI 300 or 400 series stainless steel.
Furnish certified material according to Supplement 1093. 730.10 858 730.10 Stainless Steel Hardware. Furnish stainless steel hardware according to ASTM A 320/A 320M (AISI 300 series). Furni sh bolts, screws, nuts, washers, handhole cover chains, and U -bolts that are passivated commercial grade. Furnish certified material according to Supplement 1092 or 1093.
730.11 Aluminum Sheet and Plate. Furnish sheets for extrusheet panels
according to ASTM B 209 (B 209M), 3003 -H18, or 5052 -H38. Furnish sheets for flat sheet and overlay signs, and sign post reflectors, according to ASTM B 209 (B 209M), 3004 -H38, 5052 -H38, or 6061 -T6. Furnish plates for sign support structures according to ASTM B 209 (B 209M), 6061 -T6. Furnish certified material according to Supplement 1092 or 1093.
730.12 Aluminum Extrusions. Furnish extruded panels and extrusions for
extrusheet panels according to ASTM B 221 (B 221M), 6063 -T6. For sign support structures, provide ro lled or cold finished bar, rod, and wire according to ASTM B 211 (B 211M), 6061 -T6; provide extruded bars, rods, shapes, and tubes according to ASTM B 221 (B 221M), 6061 -T6. Furnish certified material according to Supplement 1092 or 1093.
730.13 Aluminum Tube and Pipe. Furnish seamless pipe and seamless
extruded tube according to ASTM B 241/B 241M, 6061 -T6. Furnish extruded structural pipe and tube according to ASTM B 429, 6061 -T6. Furnish certified material according to Supplement 1092 or 1093.
730.14 Aluminum Castings . Furnish sand castings according to ASTM B 26/B
26M, 356 -T6 or T7. Furnish self -aligning aluminum extrusheet sign mounting clips with manufacturer identification mark conspicuously incorporated in relief on the top surface of the castin g, and in accordance with Supplemental Specification 992. Furnish permanent mold castings according to ASTM B 108, 356 -T6 or T7. Furnish certified material according to Supplement 1092 or 1093.
730.15 Aluminum Forgings. Furnish forgings according to ASTM B 247 (B
247M), 6061 -T6. Furnish certified material according to Supplement 1092 or 1093.
730.16 Aluminum Welding Rods. Furnish welding rods according to AWS
ER-4043. 730.17 859 730.17 Aluminum Hardware. Furnish hardware accor ding to: ASTM Designation Alloy Condition/Temper Bolts and screws B 211 (B 211M) 2024 6061 T4 T6 Studs -welded B 211 (B 211M) 1100 H16 Nuts -hex B 211 (B 211M) 6061 6262 T6 T9 Nuts -lock B 211 (B 211M) 2017 T4 Washers -flat B 209 (B 209M) Clad 2024 6061 T4 T6 Lock washers B 211 (B 211M) 7075 T6 Rivets -solid B 316/B 316M 6053 6061 T6 T6 Rivets -blind B 316/B 316M 2017 5052 F F F In addition, provide break -mandrel aluminum blind rivets with a stainless steel or aluminum mandrel. Furnish certified material according to Supplement 1092.
730.18 Reflective Sheeting Type F. Furnish sheeting according to ASTM D
4956, Type I, including supplemental requirement S1.
730.19 Reflective Sheeting Type G. Furnish Type G reflective sheeting of
microprismatic construction according to Supplement 1049, and according to ASTM D 4956, Type IV, including supplemental requirement S1 . Do not furnish material of glass bead construction . Furnish materials according to the Department’s QPL . 730.191 Reflective She eting Reboundable. Furnish reboundable reflective sheeting according to Supplement 1049, and according to ASTM D 4956, Type III, IV, VIII, IX or XI, including supplemental requirements S1 and S2, with watermarks or other identification marks inconspicuous ly incorporated into the face of the sheeting on a repeating pattern if necessary to distinguish the sheeting from other similarly appearing sheetings. Furnish materials according to the Department’s QPL . 730.192 Reflective Sheeting Type H. Furnish Type H reflective sheeting according to Supplement 1049, and according to ASTM D 4956, Type VIII including supplemental requirement S1. Furnish materials according to the Department’s QPL . 730.193 Reflective Sheeting Type J. Furnish Type J reflective sheeting according to Supplement 1049, and according to ASTM D 4956, Type IX or XI, including supplemental requirements S1. Furnish materials according to the Department’s QPL . 730.20 860 730.20 Nonreflective Acrylic Opaque Sheeting. Furnish non -reflective acrylic opaque sheeting according to ASTM D 4956, except provide sheeting that does not incorporate any optical elements.
730.22 Silk Screen Inks. Furnish opaque and transparent process color inks used
in the silk screen process that the manufacturer of the reflective sheeting accepts and warrants according to Supplement 1049. Use inks that provide a tough, durable film of uniform thickness and ap pearance on the sign surface. Furnish transparent process color inks used in the reverse screen process according to the Daytime Color Specification Limits table in ASTM D 4956.
730.23 Transparent Acrylic Electronic Cuttable Films. Furnish transparent
acrylic electronic cuttable films the manufacturer of the reflective sheeting warrants according to Supplement 1049. Use films that provide a uniform appearance on the sign surface. Furnish films according to the Daytime Color Specification Limits table in ASTM D 4956. 731 SIGN LIGHTING A ND ELECTRICAL SIGNS MATERIAL
731.03 Changeable Message Sign, Electrical Type.
A.General. Electrical changeable message signs consist of units or groups of units containing arrangements of pixels that use electrical c ircuitry to display different messages. Place signs in weatherproof cabinets. Integrate control logic units, load switches, monitor feedback circuits, power supply, etc., within the sign cabinet or mount within a separate weatherproof enclosure as require d.
B.Message Type. Furnish electrical changeable message signs of the limited message or unlimited message type. Limited message signs contain pixels in an arrangement so that by the energizing of selected pixels two or more messages may be displayed. Unlimited message signs contain pixels arranged in full matrix or alphanumeric type modules positioned side -by-side to provide line units of the specified length. Ensure that the line units are capable of displaying messages containing letters and numerals, limited only by the number of characters that can be accommodated. Ensure that the line units are capable of continually displaying alternating messages. Furnish materials according to the Department’s QPL .
C.Display Type. Furnish electrical changeable message signs consisting of lamp, light emitting diode, fiber optic, light reflecting, or hybrid types. Lamp type changeable message signs consist of individual incandescent bulbs. Light emitting diode changeable message signs consist of groups of individ ual light emitting diodes that, acting together, form individual character pixels. Fiber optic changeable message signs consist of fiber optic bundles that transmit light from a remote source to form individual pixels. 731.05 861 Light reflecting changeable message s igns consist of individual light reflecting panels. Hybrid changeable message signs consist of individual light reflecting panels, each augmented by a light emitting pixel of the specified type. Ensure that the light emitting pixels are displayed when the corresponding reflecting panel is in the exposed position, and concealed or de -energized when the corresponding reflecting panel is in the unexposed position. Furnish materials according to the Department’s QPL .
731.05 Internally Illuminated Fixed Messag e Sign. Furnish internally
illuminated fixed message signs of the required legend and that consist of an opaque housing with a face of translucent plastic. If specified, provide double faced signs. Illuminate signs using interior lamps located so the si gn face is uniformly lighted. Furnish signs either with the legend on the exterior surface to maintain legibility when unlighted due to power failure, or with the legend on the interior surface so as to be invisible when the sign is unlighted. Apply the l egend using black silk screening or by direct applied characters to white sign faces, unless otherwise specified. Design the sign faces for quick removal for maintenance, and provide faces with a safety chain or like device. If specified, shield the sign faces with sunscreens, louvering, or visors. Furnish housings made of corrosion -resistant material that is cast, extruded, or formed. Furnish mounting hubs that are similar to traffic signal design. Furnish weatherproof signs that have drainage weephole s. Furnish the sign with the appropriate hardware for mounting by span wire, mast arm, pedestal top, or pole type bracket arms. Include fluorescent type lamps with ballast or LED light source. Furnish materials according to the Department’s QPL.
731.06 Si gn Flasher Assembly. Furnish beacons consisting of single traffic
signal sections with 8 or 12 -inch (200 or 300 mm) yellow lenses. Ensure that the flasher control unit flashes the beacons at a rate for each beacon of between 50 to 60 times per minute wi th the light period from one -half to two -thirds of the total cycle. Furnish flasher control units that have all solid state components and that meet NEMA TS -1, part 6. House control units within a weatherproof corrosion -resistant enclosure with a lockabl e door. Include the LED lamps. Ensure that the manufacturer of LED beacons is listed on the Department’s TAP List for LED signal lamps. Furnish materials according to the Department’s QPL.
731.07 School Speed Limit Sign Assembly. Furnish yellow beacons that are 8
inches (200 mm) or 12 inches (300 mm). Ensure that the flashers flash the beacons alternately at a rate for each beacon of 50 to 60 times per minute with the light period from one -half to two -thirds of the total cycle. Furnish flashers that have all solid state components and that meet NEMA TS -1, part 6. Ensure that the backing members with hardware are compatible with the method of support.
Source: Ohio Construction and Material Specifications, 2019 Edition. Pages 0–0 of 928.