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Mr.Drew Martin • • <br /> City of Everett Planning and Public Works <br /> March 12,2019 <br /> File No.262018.055 <br /> Page 3 <br /> condition, the FRP is designated as a bidder-designed element with criteria <br /> provided and a design submittal is expected from the supplier. <br /> 6. Continuing with the previous comment,the"Design Strength"paragraph in the <br /> "Renovation" section of the General Structural Notes on Sheet SO.0 states that the <br /> FRP system shall be designed for the "total strength and confinement" <br /> requirements specified in the drawings. Performance and load requirements for the <br /> design of the FRP repairs do not appear to be provided. The structural drawings <br /> shall be revised to specify the required criteria. The mechanism(s) for each load <br /> shall be specified (e.g., column compression, corbel moments, girder shear, <br /> prestressed endzone anchorage, etc.). See IBC Section 1603.1.8. <br /> Response: Details on Sheets S.10 and S.11 have been revised to include <br /> performance and load requirement for the design of FRP repairs. <br /> Requirements are indicated in terms of equivalent rebar reinforcing. <br /> 7. Detail 19/S.10 (Revised Detail 14/S.10) specifies a minimum repair length of 4'-6" <br /> from the girder end, which must wrap around the bottom of the girder per Detail <br /> 14/S.10 (revised Detail 1 S/S.10). The girder bearing connection prevents wrapping <br /> the beam underside for at least one-half of the corbel depth. Verify the required <br /> length of the repair. See IBC Section 107.2.1. <br /> Response: The intent of the detail was for the wrap to occur on the side of the <br /> beam and corbel only, and not extend into the bearing surfaces. Detail 14/S1.0 <br /> has been revised to clarify this and to clearly exclude FRP wrap on girder at <br /> the corbel. <br /> 8. Detail 18/S.10 (Revised Detail 8/S.10) specifies repair of the embedded bearing <br /> plates in the deck girder ends. The repair appears to require removal of concrete <br /> between the girder end and the plate, which may induce unintended stresses in the <br /> plate (e.g., flexure,pryout loads on embedded elements, etc.). See IBC Sections <br /> 1603.1, 1604.1, and 1604.4. The following comments shall be addressed: <br /> a. Calculations shall be submitted substantiating that the temporary construction <br /> condition of the bearing assembly is adequate for the proposed repair. Detail <br /> 18/S.10 (Revised Detail 8/S.10) shall be revised to specify the maximum <br /> amount of material that may be removed without destabilizing the assembly. <br /> b. Alternatively, details for a shoring system shall be specified in the structural <br /> drawings; calculations substantiating the system shall be provided. Where the <br /> temporary shoring is deferred for design by the contractor, the shoring system <br /> shall be included in the list of Deferred Submittals on Sheet SO.0;performance <br /> requirements shall be specified per IBC Section 1603.1.8. <br /> S I 5 Reid iddleton <br />