Rev. 7-1-95

GUARDRAIL END TREATMENTS

601-R-183

The Standard Specifications are revised as follows:

SECTION 601, AFTER LINE 35, INSERT AS FOLLOWS:
The materials for guardrail end treatments shall be as follows:

(a) Guardrail End Treatment Type I. The material for guardrail end treatment type I shall be in accordance with 910.09, 910.10, 910.11, and 910.12. The concrete anchor shall be class A in accordance with 702.

(b) Guardrail End Treatment Type MS. Guardrail end treatment type MS shall be the Combination Attenuating Terminal, including the transition section, as manufactured by the Syro Steel Company. The configuration of the unit shall be as crash tested and approved in accordance with FHWA requirements.

(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 .