CONSTRUCTION SPECIFICATION FOR TAU II SYSTEM

Transcription

1 ONTARIO PROVINCIAL STANDARD SPECIFICATION METRIC OPSS 752 NOVEMBER 2010 CONSTRUCTION SPECIFICATION FOR TAU II SYSTEM TABLE OF CONTENTS SCOPE REFERENCES DEFINITIONS - Not Used DESIGN AND SUBMISSION REQUIREMENTS MATERIALS EQUIPMENT - Not Used CONSTRUCTION QUALITY ASSURANCE MEASUREMENT FOR PAYMENT BASIS OF PAYMENT APPENDICES 752-A Commentary SCOPE This specification covers the requirements for the installation of permanent and temporary TAU II Systems and relocation of temporary TAU II Systems Specification Significance and Use This specification has been developed for use in provincial- and municipal-oriented Contracts. The administration, testing, and payment policies, procedures, and practices reflected in this specification correspond to those used by many municipalities and the Ontario Ministry of Transportation. Use of this specification or any other specification shall be according to the Contract Documents. Page 1 Rev. Date: 11/2010 OPSS 752

2 Appendices Significance and Use Appendices are not for use in provincial contracts as they are developed for municipal use, and then, only when invoked by the Owner. Appendices are developed for the Owner s use only. Inclusion of an appendix as part of the Contract Documents is solely at the discretion of the Owner. Appendices are not a mandatory part of this specification and only become part of the Contract Documents as the Owner invokes them. Invoking a particular appendix does not obligate an Owner to use all available appendices. Only invoked appendices form part of the Contract Documents. The decision to use any appendix is determined by an Owner after considering their contract requirements and their administrative, payment, and testing procedures, policies, and practices. Depending on these considerations, an Owner may not wish to invoke some or any of the available appendices REFERENCES When the Contract Documents indicate that provincial-oriented specifications are to be used and there is a provincial-oriented specification of the same number as those listed below, references within this specification to an OPSS shall be deemed to mean OPSS.PROV, unless use of a municipal-oriented specification is specified in the Contract Documents. When there is not a corresponding provincialoriented specification, the references below shall be considered to be to the OPSS listed, unless use of a municipal-oriented specification is specified in the Contract Documents. When the Contract Documents indicate that municipal-oriented specifications are to be used and there is a municipal-oriented specification of the same number as those listed below, references within this specification to an OPSS shall be deemed to mean OPSS.MUNI, unless use of a provincial-oriented specification is specified in the Contract Documents. When there is not a corresponding municipaloriented specification, the references below shall be considered to be the OPSS listed, unless use of a provincial-oriented specification is specified in the Contract Documents. This specification refers to the following standards, specifications, or publications: Ontario Provincial Standard Specifications, Construction OPSS 314 OPSS 904 Untreated Granular, Subbase, Base, Surface, Shoulder, and Stockpiling Concrete Structures Ontario Provincial Standard Specifications, Material OPSS 1350 OPSS 1440 Concrete - Materials and Production Steel Reinforcement for Concrete Ontario Ministry of Transportation Publications Ontario Traffic Manual (OTM): Book 6 - Warning Signs Page 2 Rev. Date: 11/2010 OPSS 752

3 DESIGN AND SUBMISSION REQUIREMENTS Submission Requirements Shop Drawings One set of shop drawings shall be submitted to the Contract Administrator prior to the commencement of installation MATERIALS General All supplied components shall conform to the manufacturer s specifications Concrete Concrete shall be according to OPSS 1350 with a nominal minimum 28-Day compressive strength of 30 MPa Reinforcing Steel Reinforcing steel shall be according to OPSS CONSTRUCTION General Permanent and temporary TAU II Systems shall be installed according to manufacturer s recommendations and shall be complete as supplied by the manufacturer. Systems shall be installed as specified in the Contract Documents Permanent Installation Concrete Pads, New Levelling and site preparation required for the existing granular base shall be performed prior to placing the concrete pad. The concrete pad shall be constructed as specified in the Contract Documents. Concrete shall be placed, cured, and finished according to OPSS 904. The granular base below new concrete pad shall be a minimum depth of 150 mm of existing or new Granular A and according to OPSS Concrete Surfaces and Pads, Existing Existing concrete surfaces, concrete with asphaltic concrete overlay, or existing concrete pads may be used to support the TAU II System, when specified in the Contract Documents, provided the concrete is in good condition and provides a smooth operating surface for the system. Page 3 Rev. Date: 11/2010 OPSS 752

4 Temporary Installation Existing Concrete Existing 200 mm minimum thick concrete surfaces, concrete with asphaltic concrete overlay, existing concrete pads, or precast concrete pads may be used to support the TAU II System, when specified in the Contract Documents, provided the concrete is in good condition and provides a smooth operating surface for the system Asphalt Over Concrete Existing or new 75 mm minimum thick asphalt over 75 mm minimum thick concrete pavement may be used to support the TAU II System, when specified in the Contract Documents, provided the asphalt is in good condition and provides a smooth operating surface for the system Asphalt Over Compacted Granular Existing or new 150 mm minimum thick asphalt over 150 mm minimum thick compacted granular base may be used to support the TAU II System, when specified in the Contract Documents, provided the asphalt is in good condition and provides a smooth operating surface for the system. The asphalt shall extend a minimum of 500 mm beyond the anchors Relocation TAU II Systems and object markers shall be relocated as specified in the Contract Documents, including the removal of existing anchors and placement of new anchors Modified Temporary Concrete Barriers Temporary concrete barriers shall be modified and installed as specified in the Contract Documents and the modified surfaces shall be smooth Object Markers When specified in the Contract Documents, a Wa-33 object marker according to OTM Book 6 shall be installed at each TAU II System installation. The object marker shall be mounted on a delineator post or a flexible post as specified in the Contract Documents. Posts shall be anchored to the pavement according to manufacturer s recommendations and located as specified in the Contract Documents Management of Excess Material Management of excess material shall be according to the Contract Documents QUALITY ASSURANCE Inspection The Contract Administrator shall perform visual inspections during installation to determine conformance with workmanship, design, and dimensional requirements. Failure to conform to this specification shall result in the correction of all defective workmanship and material. Page 4 Rev. Date: 11/2010 OPSS 752

5 MEASUREMENT FOR PAYMENT Actual Measurement Energy Attenuator, Permanent For measurement purposes, a count shall be made of each complete system installed Energy Attenuator, Temporary For measurement purposes, a count shall be made of each complete system installed and removed, up to the maximum number of systems required to be in place at any one time during the Contract Energy Attenuator, Relocation For measurement purposes, a count shall be made of each complete system relocated, including object markers and posts. Systems that are temporarily surplus and are required for future stages will be paid for as one relocation for the combined moves into and out of storage, including any off-site storage required due to on-site restrictions Plan Quantity Measurement When measurement is by Plan Quantity, such measurement shall be based on the units shown in the clauses under Actual Measurement BASIS OF PAYMENT TAU II System, Permanent - Item TAU II System, Temporary - Item TAU II System, Relocation - Item Payment at the Contract price for the above tender items shall be full compensation for all labour, Equipment, and Material required to do the work. Correction of any defective workmanship and material shall be the Contractor s responsibility at no cost to the Owner. Page 5 Rev. Date: 11/2010 OPSS 752

6 Appendix 752-A, November 2010 FOR USE WHILE DESIGNING MUNICIPAL CONTRACTS Note: This is a non-mandatory Commentary Appendix intended to provide information to a designer, during the design stage of a contract, on the use of the OPS specification in a municipal contract. This appendix does not form part of the standard specification. Actions and considerations discussed in this appendix are for information purposes only and do not supersede an Owner s design decisions and methodology. Designer Action/Considerations The designer should specify the following in the Contract Documents: - Installation requirements. ( ) - Concrete pad specifications. ( ) - Object marker post type. ( ) - Location of object markers. ( ) - Relocation of TAU II Systems and object markers. ( ) The designer should determine if existing concrete surfaces or pads can be used to support the TAU II System and, if so, should specify this in the Contract Documents. ( ) The TAU II System is a non-gating, redirective system. The designer should specify whether each system is TL-2 or TL-3 configuration. TL-2 configurations are required for low-speed installations with posted speeds of less than 70 km/h. TL-3 configurations are required for high-speed installations with posted speeds of 70 km/h and greater. The designer should ensure that the General Conditions of Contract and the 100 Series General Specifications are included in the Contract Documents. Related Ontario Provincial Standard Drawings OPSD OPSD OPSD OPSD OPSD OPSD OPSD Energy Attenuator, Crash Cushion, QuadGuard, TRACC, and TAU II Systems, Component-Reinforced Concrete Pad Energy Attenuator, Crash Cushion, Component-Anchor Assembly Energy Attenuator, Crash Cushion, TAU II System, Installation-Permanent, Component-Concrete Retrofit Block Energy Attenuator, Crash Cushion, TAU II System, Installation-Temporary, Unidirectional Energy Attenuator, Crash Cushion, TAU II System, Installation-Temporary, Bidirectional Energy Attenuator, Crash Cushion, TAU II System, Installation-Permanent, Unidirectional Energy Attenuator, Crash Cushion, TAU II System, Installation-Permanent, Bidirectional Page 6 Rev. Date: 11/2010 OPSS 752