CONSTRUCTION SPECIFICATION FOR MODULAR BRIDGE STRUCTURES FOR TEMPORARY INSTALLATIONS

Transcription

1 ONTARIO PROVINCIAL STANDARD SPECIFICATION METRIC OPSS.MUNI 918 APRIL 2017 (formerly OPSS 918 Common, March 1998) Note: The MUNI implemented in April 2017 replaces OPSS 918 COMMON, March 1998 with no technical content changes. CONSTRUCTION SPECIFICATION FOR MODULAR BRIDGE STRUCTURES FOR TEMPORARY INSTALLATIONS SCOPE REFERENCES DEFINITIONS TABLE OF CONTENTS SUBMISSION AND DESIGN REQUIREMENTS Submissions Working Drawings & Fabricator Certification.02 Notice of Erection.03 Certificate of Conformance Design Requirements.03 Return of Submissions MATERIALS General.02 Modular Bridge.03 Miscellaneous Hardware.04 Wood.05 Railings.06 Fasteners and Hardware for Wood Construction Not Used CONSTRUCTION General.02 Maintenance of Installation.03 Bank Seats.04 Erection and Removal of Modular Bridge Not Used Page 1 Rev. Date: 04/2017 OPSS.MUNI 918

2 Not Used BASIS OF PAYMENT Modular Bridge - Item SCOPE This specification covers the requirements for the supply, erection, maintenance and removal of standardized modular bridge structures, used for temporary installations including the ramps, bank seats, decking, sidewalks and railings REFERENCES This specification refers to the following standards, specifications or publications: Ontario Provincial Standard Specifications, Construction: OPSS 501 OPSS 907 OPSS 908 Compacting Structural Wood Systems Metal Traffic Barriers and Metal Railings for Structures Ontario Provincial Standard Specifications, Material: OPSS 1601 Wood Canadian Standard Association Standards: CSA Certification of Companies for Fusion Welding of Steel Structures CSA W47.2-M1987 Certification of Companies for Fusion Welding of Aluminum CSA W59-M1989 Welded Steel Construction, Metal Arc Welding CSA W59.2 M1991 Welded Aluminum Construction Others: OHBDC - Ontario Highway Bridge Design Code, 3 rd Ed DEFINITIONS For the purpose of this specification the following definitions apply: Bank Seats: means mud sills, timber matting and vertical post supports. Modular Bridge: means a superstructure comprised of prefabricated components that can be assembled and disassembled on site. Page 2 Rev. Date: 04/2017 OPSS.MUNI 918

3 Temporary Installation: means an installation that is erected to provide for maintenance of traffic at a construction site for a length of time not exceeding three years SUBMISSION AND DESIGN REQUIREMENTS Submissions Working Drawings & Fabricator Certification At least one week prior to commencement of construction, the following information shall be submitted to the Contract Administrator. a. Certification of the welding fabricator as required in the Materials section. b. Working drawings showing the proposed modular bridge. c. Method and procedures for launching, erecting and removing as recommended by the modular bridge manufacturer and supplementary methods and procedures proposed by the Contractor. d. Design calculations indicating that the modular bridge conforms to the requirements of the Ontario Highway Bridge Design Code or; Load test information, provided by the manufacturer of the modular bridge, indicating the superstructure conforms to the requirements for "Evaluation of Existing Bridges" section of the Ontario Highway Bridge Design Code. The working drawings, design calculations and load test information shall bear the seals and signatures of the Design and Checking Engineers Notice of Erection The Contract Administrator shall be given written notice at least one week in advance of the commencement of erection of the modular bridge Certificate of Conformance A certificate of conformance bearing the seal and signature of an Engineer, stating that the modular bridge has been installed according to the stamped working drawings shall be submitted to the Contract Administrator Design Requirements The modular bridge structure shall be designed according to the Ontario Highway Bridge Design Code except that: 1. The following requirements of the Ontario Highway Bridge Design Code are not mandatory: a. Traffic lane widths, side clearance and sidewalks. b. Deck crossfall and drain outlets. c. Limitation of maximum deflection. Designing floor beam and diaphragms for jacking and provision of a protective coating. d. Fatigue e. Accessibility for inspection, cleaning and coating, the avoidance of pockets and the provision of drain holes in pockets and their filling with waterproofing. f. Camber g. Provision of two bolts at the end of bracing members. Page 3 Rev. Date: 04/2017 OPSS.MUNI 918

4 h. Welding procedures approval when the components are manufactured outside Canada. 2. The following are additional requirements: a. The traffic lanes, side clearance and sidewalks shall be the same as those on the approaches unless specified otherwise. b. Welding design and practice shall conform to CSA W59M, CSA W59.2M or shall conform to an equivalent recognized national standard effective in the jurisdiction in which the modular bridge is fabricated. c. Unless otherwise specified, to ensure the requirements for a multiload path structure are satisfied, single trusses shall not be used. 3. The following modification is acceptable: a. Nuts with safety pins or snap rings may be used instead of hexagonal recessed nuts or hexagonal solid nuts with washers Return of Submissions Two copies will be returned as follows: a. Stamped with the wording "Permission to Construct". In this case work can start on receipt. A copy of the drawings shall be available at the site prior to and during construction. or b. Stamped with the wording "Permission to Construct Approved As Noted". Work can start on receipt of these drawings by the Contractor. In this case the drawings shall be updated as noted, shall have a stamp affixed signed by an Engineer stating the drawings have been revised according to the approved as noted comments. A copy of the updated drawings shall be available at the site prior to and during construction. or c. Showing only required changes. In this case the submission shall be updated as required and the submission process repeated MATERIALS General All material shall comply with the details specified and shown on the working drawings Modular Bridge The modular bridge shall be a commercially available standardized proprietary product. Page 4 Rev. Date: 04/2017 OPSS.MUNI 918

5 The fabricator shall be certified according to Division 2.1 of CSA W47.1 for steel fabrication or W47.2M for aluminum fabrication or certified according to an equivalent recognized National Standard effective in the jurisdiction in which the modular bridge is fabricated. Used components shall be certified by an Engineer, within 6 months prior to use, to be equivalent to new Miscellaneous Hardware The miscellaneous hardware and other structural steel used in the erection and assembly of the modular bridge shall be according to the modular bridge manufacturers requirements Wood Wood shall be according to OPSS Wood for installations that are in use for less than three years need not be preservative treated Railings Unless otherwise specified the railing shall be according to OPSS Fasteners and Hardware for Wood Construction Fasteners and hardware for wood construction shall be according to OPSS CONSTRUCTION General Prior to erection of the modular bridge, documentation shall be submitted to the Contract Administrator indicating that the foreman who will be in charge of the erection of the modular bridge has successfully performed the duties of foreman on similar work Maintenance of Installation During the working time of the Contract, excluding winter shutdown, the superstructure, bank seats, ramps, decking, sidewalks, railing and approaches shall be maintained in a safe and useable condition. Except during winter shutdown the substructure and pile bents shall be kept clear of debris and ice during the working time of the contract Bank Seats Fill under bank seats shall be compacted according to OPSS 501 to 95% of the maximum dry density Erection and Removal of Modular Bridge The modular bridge including all appurtenances shall be erected, assembled and removed according to the manufacturers recommendations. When not detailed otherwise the construction of the decking and sidewalks shall be according to the modular bridge manufacturers requirements. All wood components shall be placed tightly together and fixed firmly in place. Page 5 Rev. Date: 04/2017 OPSS.MUNI 918

6 BASIS OF PAYMENT Modular Bridge - Item Payment at the contract price for the above item shall be full compensation for all labour, equipment and material to do the work of installing, maintaining and removing the modular bridge components including the associated decking, ramps, bank seats, sidewalks and railings. Page 6 Rev. Date: 04/2017 OPSS.MUNI 918