(c) Guardrail End Treatment
Type OS. The Contractor will be permitted to use
either the SENTRE guardrail end treatment as manufactured by
Energy Absorption Systems, Inc., or the Combination Attenuating
Terminal as manufactured by the Syro Steel Company, as guardrail
end treatment type OS. The delineators and posts required for the
SENTRE's redirecting cable shall be in accordance with 804. The
configuration of the selected alternate shall be as crash tested
and approved in accordance with FHWA requirements. If the
Combination Attenuating Terminal unit is used, it shall include
the transition section. If the SENTRE unit is used, it shall
include the downstream guardrail tensioning cable section.
SECTION 601, BEGIN LINE 85, INSERT AS FOLLOWS:
to terminate guardrail installations at the locations shown on
the plans. The type of guardrail end treatment, the allowable
alternates for each type of guardrail end treatment, and the
grading requirements shall be in accordance with the
manufacturer's recommendations, and as shown on the plans.
SECTION 601, AFTER LINE 88, INSERT AS FOLLOWS:
The assembly and installation of
guardrail end treatments shall be at the locations shown on the
plans and as follows:
(a) Guardrail End Treatment
Type I. Double facing will be required when it is used
in conjunction with double faced guardrail.
(b) Guardrail End Treatment
Types MS and OS. The assembly and installation of the
guardrail end treatments type MS and OS shall be supervised or
performed at all times by an installer trained and certified by
the unit's manufacturer. A copy of the installer's certificate
shall be presented to the Engineer prior to the start of work.
The SENTRE end treatment will also require 3 type D-1 white
delineators with posts equally spaced adjacently along the
redirecting cable.
The Contractor shall provide the
Department with original copies of all necessary current
manufacturer's installation manuals and shop drawings prior to
beginning installation work. Shop drawings shall be a minimum of
560 mm by 865 mm (22 in. by 34 in.) in size. No installation work
shall begin prior to the Department's receipt of these manuals
and drawings. The manuals and drawings will remain the property
of the Department.
In case of dispute regarding
installation, the manufacturer shall provide a properly trained
representative, directly employed by the manufacturer, to ensure
that the installation is performed in accordance with the
manufacturer's recommendations.
SECTION 601, BEGIN LINE 130, INSERT AS FOLLOWS:
terminal system will be measured per each, for the type
specified. Grading at guardrail end treatments, concrete used in
anchoring guardrail end treatments, and type D-1 delineators
required with guardrail end treatment type OS SENTRE unit
will not be measured for payment.
SECTION 601, AFTER LINE 181, INSERT AS FOLLOWS:
Grading at guardrail end
treatments, double facing of guardrail end treatments, concrete
used in anchoring guardrail end treatments, and type D-1
delineators required with guardrail end treatment OS SENTRE unit
will not be paid for separately. The costs thereof shall be
included in the cost of the guardrail end .