7-118 SECTIO N 750 – TRAFFI C SIGNS 750.0 1 SIGN POSTS .
a.Steel Posts and Anchors . Steel posts and anchors shall conform to the following requirements:
1.Structural steel tubing shall conform to the requirements of Subsection 714.11 . Steel posts consisting of standard rolled steel structural shapes shall conform to the requirements of AASHTO M 270, Grade 250 (Grade 36). After fabrication, these posts shall be galvanized in accordance with AASHTO M 111 .
2.Steel posts consisting of flanged channels shall conform to the mechanical requirements of ASTM A499, Grade 60 and the chemical requirements of ASTM A1, 85 to 114 lbs/yard Rail Class. Steel posts shall con form to the details indicated on the Plans as to size, shape, weight, hole punching, hole drilling, and other details. After fabrication, these posts shall be galvanized in accordance with AASHTO M 111 .
3.Steel posts and anchors consisting of welded mech anical square tubes formed from hot - rolled carbon steel sheet shall conform to the mechanical and chemical requirements of ASTM A1011, Grade 380 (Grade 55) or Grade 245 (Grade 40). They shall conform to the details indicated on the Plans as to size, shape, weight, hole punching, hole drilling, strength, and other details. The posts shall be fabricated in accordance with ASTM A787, Type 2, and shall be galvanized with a G140 Coating in accordance with ASTM A653 . Alternatively, the posts shall be fabric ated in accordance with ASTM A787, Type 3, and shall be galvanized in accordance with AASHTO M 111 .
b.Wood Posts . Wood posts shall be seasoned, straight, and sound sawn timber comprised of either oak, cedar, spruce, western fir, or other approved wood. T he posts shall conform to the dimensions and grade shown on the Plans or requirements specified in the Contract. All wood posts shall be pressure -treated with preservative as specified in Subsection 726.01 . All cut ends or notches shall be field -treated in in accordance with AWPA Standard M4. Depending on size and location, wood posts may have to be drilled as shown on the Plans.
c.Sleeves . Sleeves for sign posts consisting of structural tubing shall conform to the requirements of ASTM A501 . They shall conform to the details shown on the Plans as to size, shape, and weight, and they shall be punched or drilled as shown on the Plans. After fabrication, all steel sleeves shall be galvanized in accordance with AASHTO M 111 . 7-119 750.0 2 EXTRUDE D ALUMINU M PANELS . Extruded aluminum panels shall conform to the requirements of ASTM B221 . Alloy 6063 -T6 shall be used when reflective sheeting is to be applied to the face of the sign. 750.0 3 FLAT SHEE T ALUMINUM . Flat sheet aluminum shall conform to the requirements of ASTM B209 for either Alloy 6061 -T6 or Alloy 5052 -H38. Aluminum components shall not be in direct contact with treated wood posts. 750.0 4 RETROREFLECTIV E SHEETING . Retroreflective sheeting is a material that redirects light back to the source of the light. Retroreflective sheeting shall be evaluated in accordance with the applicable AASHTO Product Evaluation & Audit Solutions work plan, be one of the products listed on the Agency’s Approved Products List , conform to AASHTO M 268 , and meet the following requirements :
a.Type III . Retroreflective sheeting, Type III shall conform to ASTM D4956 , Type III.
b.Type IV . Retroreflective sheeting, Type IV shall conform to ASTM D4956 , Type IV.
c.Type V . Retroreflective sheeting, Type V shall conform to ASTM D4956 , Type V.
d.Type VI . Retroreflective sheeting, Type VI shall conform to ASTM D4956 , Type VI.
e.Type VII . Retroreflective sheeting, Type VII shall conform to ASTM D4956 , Type VII.
f.Type VIII . Retroreflective sheeting, Type VIII shall con form to ASTM D4956 , Type VIII.
g.Type IX . Retroreflective sheeting, Type IX shall conform to ASTM D4956 , Type IX.
h.Type X . Retroreflective sheeting, Type X shall conform to ASTM D4956 , Type X.
i.Type XI . Retroreflective sheeting, Type XI shall confo rm to ASTM D4956 , Type XI.
750.05 ASSEMBL Y HARDWARE . Unless otherwise shown on the Plans, the assembly hardware used
to fasten and support traffic sign components shall conform to the designs and sizes used in standard commercial practices for the materials involved.
a.Bolts, Nuts, and Washers . Bolts and washers shall be stainless steel conforming to the requirements of ASTM F593, Alloy Group 1, Condition AF, Alloy 304, and its supplementary requirements for S5. Nuts shall be stainless steel conforming to the requirements of ASTM F594, Alloy Gr oup 1, Condition AF, Alloy 304, and its supplementary requirements for S5.
b.Rivets . Rivets shall be aluminum conforming to the requirements of ASTM B316, Alloy 6053 -T61.
c.Clips . Clips used to fasten extruded aluminum panels to the supporting posts shall be aluminum conforming to the requirements of ASTM B108 , Alloy 356 -T6. 7-120 SECTION 751 – DELINEATORS
751.01 Steel Delineators .
a.Steel Posts and Anchors . Steel posts, anchors, and sleeves shall be galvanized in accordance with the requirements of AASHTO M 111 after fabrication, and shall conform to the following additional requirements:
1.Steel posts fabricated as flanged channels shall conform to the mechanical requirements of ASTM A499, Grade 60 and the chemical requirements of ASTM A1, 85 lbs/yard to 114 lbs/yard Rail Class.
2.Steel posts and anchors fabricated as welded mechanical squ are tubes formed from hot - rolled carbon steel sheet shall conform to the mechanical and chemical requirements of ASTM A1011, Grade 380 (Grade 55) or Grade 245 (Grade 40). The posts may be fabricated in accordance with the requirements of ASTM A787, Type 2, and galvanized with a G140 Coating in accordance with ASTM A653. Alternatively, the posts may be fabricated in accordance with the requirements of ASTM A787, Type 3.
b.Sleeves . Sleeves for sign posts consisting of structural tubing shall conform to the requirements of ASTM A501 .
c.Assembly Hardware . Assembly hardware shall conform to the following requirements:
1.Bolts and Nuts . Bolts and nuts shall be fabricated from aluminum conforming to the requirements of ASTM B211 , Alloy 2024 -T4. Both bolts and nuts shall be given another coating at least 0.2 mil in thickness with dichromate or boiling water seal.
2.Washers . Washers shall be fabricated from aluminum conforming to the requirements of ASTM B209 , Alloy 2024 -T4.
751.02 FLEXIBLE DELINEATORS . Flexible delineators shall be surface mounted delineators in
accordance with the MUTCD for tubular markers for use on high -speed highways or nighttime use. Flexible delineators shall be MASH compliant with self -certification from the manufacturer and be one of the products listed on the Agency’s Approved Products List .
751.03 DETECTABLE WARNING SURFACE . Detectable warning surfaces shall be in accordance with
AASHTO M 333 . Detectable warning surfaces shall be cast iron, mechanically anchored, cast -in-place, and one of the products listed on the Agency’s Approved Products List . Detectable warning surfaces shall not be colored unless otherwise specified in the Contract. If coloring is specified it shall be applied by the manufacturer.
Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 1270–1271 of 1,380.