SPECIAL PROVISION 901-S-721-2
MATERIALS FOR SIGNING
PROJECT NO.
COUNTY
OFFICE OF STATE AID ROAD CONSTRUCTION
MISSISSIPPI DEPARTMENT OF TRANSPORTATION
DATE:
July 16, 1993
SUBJECT:
MATERIALS FOR SIGNING
Section S-721, Materials for Signing, Mississippi Standard Specifications for State Aid Road and
Bridge Construction, 1989 Edition, is hereby supplemented as follows:
Subsection S-721.01.5; Bolts, Nuts, Washers, Screws, and other Hardware: on page 7-147, after the
second paragraph add the following:
901-S-721.01.5--Vandal-Resistant Bolts, Vandal-Resistant Nuts, Nylon Washers and other
Hardware.
When Vandal-Resistant Hardware for signs are noted on the plans, all
bolts, nuts, and washers shall be cadmium-coated in accordance, with
ASTM Designation A 165, Type TS. Bolts shall be 5/16-inch
diameter, 2½-inch long (minimum) carriage bolts, hex bolts or "oneway" bolts. Carriage bolts shall be round headed with a square neck
and shall not have any slots or other opening for any type of tool.
This square neck shall fit snugly and not move when tightened into the
hole in the sign face. Hex bolt and one-way bolt heads shall not be
square necked, but shall tighten flat against the sign face. One-way
bolts shall be able to be tightened but not loosened by a screw driver.
If hex bolts or one-way bolts are used, a nylon washer shall be
provided to place between the bolt head and the sign face.
An approved vandal-resistant nut will be required regardless of the
type of bolt used. A 5/16-inch inside diameter rustproofed steel,
aluminum or approved equal washer shall be provided to place
between the post and the vandal-resistant nut. The outside diameter
of this washer will be dependent on the type of vandal-resistant nut
used.
(07-16-93)
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