CONSTRUCTION SPECIFICATION FOR GUIDE RAIL END TREATMENT - EXTRUDER TERMINAL SYSTEM

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1 ONTARIO PROVINCIAL STANDARD SPECIFICATION METRIC OPSS 559 NOVEMBER 2006 CONSTRUCTION SPECIFICATION FOR GUIDE RAIL END TREATMENT - EXTRUDER TERMINAL SYSTEM TABLE OF CONTENTS SCOPE REFERENCES DEFINITIONS Not Used SUBMISSION AND DESIGN REQUIREMENTS - Not Used MATERIALS EQUIPMENT - Not Used CONSTRUCTION QUALITY ASSURANCE - Not Used MEASUREMENT FOR PAYMENT BASIS OF PAYMENT APPENDICES 559-A Commentary SCOPE This specification covers the requirements for the installation of the guide rail end treatment known as the Extruder Terminal (ET) system Significance and Use of Appendices Appendices are not a mandatory part of this specification unless invoked by the Owner. Appendix 559-A is a commentary appendix to provide designers with information on the use of this specification in a Contract. Page 1 Rev. Date: 11/2006 OPSS 559

2 REFERENCES This specification refers to the following standards, specifications, or publications: Ontario Provincial Standard Specifications, Construction OPSS 552 Steel Beam Guide Rail and Cable Guide Rail Ontario Provincial Standard Specifications, Material OPSS 1504 OPSS 1601 Steel Beam Guide Rail Wood - Material, Preservative Treatment, and Shop Fabrication American Society for Testing and Materials A Standard Practice for Repair of Damaged and Uncoated Areas of Hot Dip Galvanized Coatings MATERIALS General All supplied system components shall be according to the manufacturer s specifications. Manufacturer s installation instructions shall be supplied with each system Wooden Posts and Blocks Wooden posts and blocks shall be according to OPSS Steel Beam Guide Rails, Nuts, Bolts, and Washers Steel beam guide rails, nuts, bolts, and washers shall be according to OPSS CONSTRUCTION General ET systems shall be installed according to manufacturer s instructions at locations specified in the Contract Documents. The ET system shall be installed in a straight line. The ET system shall not be installed on roadway curves less than 250 m radius. A minimum 2 m wide area behind the posts, measured from the back of the posts, shall be clear of all obstacles for the entire length of the ET system Posts and Steel Foundation Tubes Wooden posts and steel foundation tubes shall be set to the depth and alignment at the locations specified in the Contract Documents regardless of the material encountered. Permissible tolerance for plumb shall be 20 mm maximum over the post length above ground. Page 2 Rev. Date: 11/2006 OPSS 559

3 Wooden post tops shall be cut to the height and to the chamfer specified in the Contract Documents. All holes shall be drilled in the wooden posts prior to installation. The predrilled holes and the cut tops of the wooden posts shall be treated with two coats of an approved wood preservative according to OPSS All steel foundation tubes and soil plates shall be installed such that no more than 50 mm is exposed above finished grade Steel Beam Guide Rail Steel beam guide rails shall be installed according to OPSS 552. ET systems shall be connected to new or existing steel beam guide rail as specified in the Contract Documents. Where steel beam guide rail with channel is immediately adjacent to the ET system, the channel shall be terminated at the 9 th post from the terminal end of ET. The transition in mounting height for both the channel and steel beam guide rail element shall commence at the ninth post and continue over 7.62 m to the 13 th post from the terminal end of ET, where the mounting height shall be within acceptable mounting height range for steel beam guide rail with channel. ET system mounting heights shall be measured vertically with a tape measure to the bottom of a carpenter s level held horizontally on top of the steel beam guide rail. ET system mounting heights shall be within the following tolerances: a) 685 to 760 mm during construction and seasonal shutdown. b) 685 to 735 mm for completion of the work. Where curb with gutter is required, steel beam guide rail mounting height shall be measured: a) Vertically at face of steel beam guide rail, when the face of steel beam guide rail is more than 300 mm beyond gutter line. b) Vertically at gutter line, when face of steel beam guide rail is 300 mm or less beyond the gutter line Field Fabrication Field fabrication of steel beam guide rail shall be according to OPSS Damage to Galvanizing Precautions shall be taken to protect galvanizing against damage. Minor abrasions, e.g., a single strip of damage area not wider than 30 mm throughout the length of the steel beam guide rail element, shall be repaired according to ASTM A 780. The method of repair for any damage shall be approved by the Contract Administrator prior to the commencement of such work Object Markers Object markers shall be installed at ET systems as specified in the Contract Documents. Page 3 Rev. Date: 11/2006 OPSS 559

4 MEASUREMENT FOR PAYMENT Actual Measurement Extruder Terminal System For measurement purposes, a count shall be made of each complete Extruder Terminal system installed Plan Quantity Measurement When measurement is by Plan Quantity, such measurement shall be based on the unit shown in the clause under Actual Measurement BASIS OF PAYMENT Extruder Terminal System - Item Payment at the Contract price for the above tender item shall be full compensation for all labour, Equipment, and Material required to do the work. Costs associated with any required repairs or removals and replacements of defective materials shall be the Contractor s responsibility at no cost to the Owner. Page 4 Rev. Date: 11/2006 OPSS 559

5 Appendix 559-A, Commentary for OPSS 559, November 2006 Note: This appendix does not form part of the standard specification. It is intended to provide information to the designer on the use of this specification in a Contract. Designer Action/Considerations The designer should specify the following in the Contract Documents: - Extruder Terminal system locations. ( ) - Object marker requirements. ( ) The designer should minimize the use of curb with gutter in advance and along end treatments and crash cushions. See MTO Roadside Safety Manual for additional information. The designer should ensure that the Ontario Provincial Standards General Conditions of Contract and the 100 Series General Specifications are included in the Contract Documents. Related Ontario Provincial Standard Drawings OPSD OPSD OPSD Energy Attenuator, End Treatment, Extruder Terminal System, Assembly Energy Attenuator, End Treatment, Extruder Terminal System, Installation Energy Attenuator, End Treatment, Extruder Terminal System, Extruder Terminal Approach End Page 5 Rev. Date: 11/2006 OPSS 559