Walls supporting roadway embankment and having structural components (geogrid, strips,
tie bars, or pre-cast units) extending behind the wall must have plaques placed in
the coping or capstone along the top of the wall at intervals not exceeding 100 feet
(30 meters). The plaques must be made of durable metal, at least 5 inches (125 millimeters)
by 8 inches (200 millimeters), with ½ inch (12.5 millimeters) raised lettering that
reads "Do not excavate between the retaining wall and street/No excave entre el muro
de contención y la calle." The plaque must have at least two studs attached to the
back so it can be mounted flat against the coping or capstone by inserting the studs
into holes drilled into the side or top of the coping or capstone. The plaque must
be set in epoxy or non-shrink grout covering the mounting surface and filling the
holes.
Walls not supporting roadway embankment, but having structural components (geogrid,
strips, tie bars, or pre-cast units) extending behind the wall must have warning plaques
as described above but which say "Do not excavate behind the wall within
____________
feet/No excave detrás del muro de contención dentro de una distancia de
____________
meters."
Warning tape must be placed 6 inches (150 millimeters) above the uppermost layer of
geogrid or strips used in MSE walls. The tape must be placed in a crisscross pattern
on 24-inch (600 millimeters) spacing.
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