730 TRAFFIC SIGN AND SUPPORT MATERIAL
730.01 Steel Tube and Pipe. Furnish
steel tube and pipe according to ASTM A
53, 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
length. 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 |
Weight 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 Qualified
Products List (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 knockouts 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 finished
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 coating and a cross-linked
polyurethane acrylic coating. The inside of the post has a zinc organic
coating.
Furnish
materials according to the Department’s Qualified
Products List (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 connecting successive veneers in each layer staggered
throughout the thickness of the beam. A 45 degree miter shall be used for
the corner joints. The adhesive used shall be a phenol-formaldehyde which
conforms to ASTM D 2559.
The beams shall be pressure treated with a pentachlorophenol preservative
meeting AWPA Standard C33, with a minimum preservative
retention of 0.60 lb/ft3
(9.6 kg/m3) of pentachlorophenol.
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 Qualified
Products List (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) and
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 572
(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 alloy.
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 less 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 B18.21.1. 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 Stainless Steel Hardware. Furnish
stainless steel hardware according to ASTM A
320/A 320M (AISI 300 series). Furnish 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 rolled
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 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 Aluminum Hardware. Furnish
hardware according to:
|
ASTM Designation |
Alloy |
Condition/Temper |
Bolts and screws |
2024 6061 |
T4 T6 |
|
Studs-welded |
1100 |
H16 |
|
Nuts-hex |
6061 6262 |
T6 T9 |
|
Nuts-lock |
2017 |
T4 |
|
Washers-flat |
Clad 2024 6061 |
T4 T6 |
|
Lock washers |
7075 |
T6 |
|
Rivets-solid |
6053 6061 |
T6 T6 |
|
Rivets-blind |
2017 2117 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 according to Supplement 1049,
and according to ASTM D 4956,
Type III or IV, including supplemental requirement S1.
Furnish
materials according to the Department’s Qualified
Products List (QPL).
730.191
Reflective Sheeting 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 inconspicuously 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 Qualified
Products List (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 Qualified
Products List (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 Qualified
Products List (QPL).
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 appearance
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.