ENGINEERING INSTRUCTION - dot.ny.gov

1 January 2019 ENGINEERING INSTRUCTION EI 19-001 Title: NYSDOT LRFD BRIDGE design SPECIFICATIONS - 2019 Approved: Original Signed by Richard Marchione Richard Marchione, PE Deputy Chief Engineer (Structures) 01-14-2019 Date ADMINISTRATIVE INFORMATION: This ENGINEERING INSTRUCTION (EI) is effective beginning with projects submitted for the letting of May 1, 2019 This EI supersedes EI 16-016 NYSDOT LRFD BRIDGE design SPECIFICATIONS Disposition of Issued Materials: The technical information transmitted by this EI will be incorporated into the next revision of the NYSDOT Bridge Manual PURPOSE: This EI officially adopts the NYSDOT LRFD Bridge design Specifications 2019 for use in New York State and announces the availability of NYSDOT LRFD Blue Pages dated January 2019. TECHNICAL INFORMATION: The AASHTO LRFD Bridge design Specifications - 8th Edition, 2017, together with the AASHTO Errata Changes for LRFD-8, May 2018 and the NYSDOT LRFD Blue Pages dated January 2019 constitute the NYSDOT LRFD Bridge design Specifications.

2 The LRFD specifications will continue to be used for the design of all new and replacement bridges for NYSDOT. This includes both superstructure designs and substructure designs. This EI does not discontinue use of the NYSDOT Standard Specifications for Highway Bridges 2003. Both specifications will continue to be used until further notice. The existing NYSDOT Standard Specifications for Highway Bridges - 2003 will be used when necessary for the repair and rehabilitation of structures. The NYSDOT Standard Specifications for Highway Bridges 2003 consists of the AASHTO Standard Specifications for Highway Bridges - 17th Edition plus the NYSDOT Blue Pages , issued by EB 02-038 and EB 03-016. Currently, NYSDOT overload permitting and bridge posting policies require that new and replacement bridges be load rated using the Load Factor design (LFD) January 2019 or allowable stress design (ASD) methods.

3 For this reason, load ratings will continue to be computed by the LFD or ASD method and shown on the contract plans. Also, load rating factors for all new and replacement bridges will be computed by the Load and Resistance Factor Rating (LRFR) method and shown on the contract plans. LRFR ratings shall be shown at the Inventory and Operating levels as rating factors of the AASHTO HL-93 live load. Once overload permitting and bridge posting policies are revised to accommodate LRFR, load ratings using the LFD and ASD methods will be discontinued. The NYSDOT Bridge Manual supplements both the LRFD Specifications and the Standard Specifications for Highway Bridges. Designers are required to consult the Bridge Manual for additional policies, guidance, details and interpretations of the design specifications. The NYSDOT LRFD Blue Pages dated January 2019 do not replace any existing NYSDOT LRFD Blue Pages for the AASHTO LRFD Bridge design Specifications 8th Edition, 2017, including the AASHTO Errata Changes for LRFD-8, May 2018.

4 IMPLEMENTATION: This ENGINEERING INSTRUCTION (EI) is effective immediately for all structural design projects in New York State unless immediate implementation will result in undue delay to projects currently under design as determined by the Regional Director and the Deputy Chief Engineer (Structures). TRANSMITTED MATERIALS: The NYSDOT LRFD Blue Pages dated January 2019 can be found at the following web address: CONTACT: Direct questions regarding this EI to Harry White of the Office of Structures at (518) 485-6634 or via e-mail at January 2019 2019 NYSDOT Blue Pages Article No. Proposed vs. Current Comments No changes No changes No changes No changes Modified Minor editorial changes. No changes Modified Minor editorial changes. Modified Minor editorial changes. Modified Minor editorial changes. No changes New Defining wind speed in special wind region.

5 New Modified Table to account for sound barriers mounted on structures. No changes No changes Modified Minor editorial changes. Modified Minor editorial changes. Modified Minor editorial changes. Modified Minor editorial changes. Modified Minor editorial changes. Modified Minor editorial changes. Modified Minor editorial changes. New Removed requirement for minimum seismic connection force and replaced with requiring minimum support length. Modified Minor editorial changes. Modified Minor editorial changes. Modified Minor editorial changes. Modified To improve readability, removed redundant tables and corrected minor typographical, spelling, and grammar errors There January 2019 were no changes in substance. New Added minimum value for LL Surcharge New Added minimum value for LL Surcharge No changes No changes No changes No changes No changes No changes No changes No changes No changes No changes No changes No changes No changes No changes No changes Modified Entire section was renumbered Blue Page altered to reflect new references and minor grammatical changes.

6 Modified Entire section was renumbered Blue Page altered to reflect new references and minor grammatical changes. New Entire section was renumbered Blue Page altered to reflect new references and minor grammatical changes. New Entire section was renumbered Blue Page altered to reflect new references and minor grammatical changes. January 2019 New Entire section was renumbered Blue Page altered to reflect new references and minor grammatical changes. New Entire section was renumbered Blue Page altered to reflect new references and minor grammatical changes. New Entire section was renumbered Blue Page altered to reflect new references and minor grammatical changes. New Entire section was renumbered Blue Page altered to reflect new references and minor grammatical changes. New Entire section was renumbered Blue Page altered to reflect new references and minor grammatical changes. No changes Modified Minor editorial changes.

7 Modified Minor editorial changes. C Modified Minor editorial changes. No changes No changes Modified Minor editorial changes. No changes No changes No changes No changes No changes No changes Modified Made specific for tension members. New Made specific for compression members. January 2019 No changes No changes No changes Modified Minor editorial changes. No changes No changes No changes No changes No changes No changes No changes No changes New Modified Figure New Modified requirements for soil reinforcement pullout design Removed This Blue Page is Deleted Modified Clarify when the deflection requirement is applicable. Modified Minor editorial changes. Modified Minor editorial changes. New Correcting typographical error in specification formula. No changes Modified Making uncertainty requirement consistent between pot and disc bearings.

8 January 2019 NEW YORK STATE DEPARTMENT OF TRANSPORTATION LRFD BLUE PAGES TABLE OF CONTENTS Article Article Article (New) (New) (New) (New) (New) (New) (New) (New) (New) (New) (New) (New) (New) (New) App. (New) (New) (New) January 2019 [This Page Intentionally Left Blank] January 2019 SCOPE OF THE SPECIFICATION Delete the sixth paragraph of Article and replace it with the following: Seismic design shall be in accordance with the provisions in these specifications. Seismic design in accordance with the provisions given in the AASHTO Guide Specifications for LRFD Seismic Bridge design can be used with the approval of Deputy Chief Engineer (Structures). January 2019 design PHILOSOPHY Operational Importance Delete the third paragraph and replace it with the following: For the strength limit state: I = for critical bridges* = for essential and other bridges For all other limit states: I = *For definition of critical bridges, see Blue Page January 2019 LOAD FACTORS AND COMBINATIONS Load Factors and Load Combinations Delete the sixth bullet of the second paragraph and replace it with the following: EXTREME EVENT I - Load combination including earthquake.

9 The load factor for live load EQ, shall be for bridges with Average Daily Truck Traffic (ADTT) greater than 5,000 and for all other bridges. January 2019 LOAD FACTORS AND COMBINATIONS Load Factors and Load Combinations Add the following note to the end of Table : For horizontal reinforcement design of a cantilevered wingwall rigidly attached to an integral abutment, a passive lateral earth pressure load factor of shall be used. January 2019 LOAD FACTORS AND COMBINATIONS Load Factors and Load Combinations Delete the second to last paragraph of Article January 2019 LIVE LOADS Gravity Loads: LL and PL design Vehicular Live Load General Add the following paragraph to the end of Article : NY State owned bridges (including state owned bridges carrying parkways), all bridges on the National Highway System and all bridges on the state touring routes shall also be designed for the NYSDOT design Permit Vehicle in accordance with Article , unless otherwise approved by Deputy Chief Engineer (Structures).

10 January 2019 LIVE LOADS Gravity Loads: LL and PL design Vehicular Live Load Add a new Article : NYSDOT design Permit Vehicle The NYSDOT design Permit Vehicle is a design vehicular load to be applied to the Strength II limit state. For pre-stressed concrete bridges, the NYSDOT design Permit Vehicle shall also be used for the Service III limit state as a design load case in addition to the AASHTO HL93 live load (see Article for Service III resistance limits). All ratable elements (such as beams, girders, steel cap beams and steel columns) of new and replacement bridges shall satisfy these limit states using NYSDOT design Permit Vehicle. The design permit vehicle loading shall be used for all State-owned bridges (including State-owned bridges carrying parkways), all bridges on the National Highway System and all bridges on the state touring routes unless otherwise approved by Deputy Chief Engineer (Structures).