Laserfiche WebLink
Mr. Ruben Sanchez <br /> City of Everett <br /> Plan Check Number: B1812-022, First Building Review <br /> January 14, 2019 <br /> Gravity System: <br /> 5. Detail 19/S.10 specifies individual repairs for both the concrete columns and prestressed <br /> girder ends. It is unclear if the proposed work is repairing structural damage or is intended <br /> to prevent future damage. If the former, structural calculations substantiating the proposed <br /> repair shall be submitted for review. See IEBC Section 606.2.3 and IBC Section 1604.1. <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 FRP <br /> system shall be designed for the"total strength and confinement"requirements specified in <br /> the drawings. Performance and load requirements for the design of the FRP repairs do not <br /> appear to be provided. The structural drawings shall be revised to specify the required <br /> criteria. The mechanism(s) for each load shall be specified (e.g., column compression, <br /> corbel moments, girder shear, prestressed endzone anchorage, etc.). See IBC Section <br /> 1603.1.8. <br /> 7. Detail 19/S.10 specifies a minimum repair length of 4'-6"from the girder end, which must <br /> wrap around the bottom of the girder per Detail 14/S.10. The girder bearing connection <br /> prevents wrapping the beam underside for at least one-half of the corbel depth. Verify the <br /> required length of the repair. See IBC Section 107.2.1. <br /> 8. Detail 18/S.10 specifies repair of the embedded bearing plates in the deck girder ends. The <br /> repair appears to require removal of concrete between the girder end and the plate, which <br /> may induce unintended stresses in the plate (e.g., flexure, pryout loads on embedded <br /> elements, etc.). See IBC Sections 1603.1, 1604.1, and 1604.4. The following comments <br /> shall be addressed: <br /> a. Calculations shall be submitted substantiating that the temporary construction condition <br /> of the bearing assembly is adequate for the proposed repair. Detail 18/S.10 shall be <br /> revised to specify the maximum amount of material that may be removed without <br /> destabilizing the assembly. <br /> b. Alternatively, details for a shoring system shall be specified in the structural drawings; <br /> calculations substantiating the system shall be provided. Where the temporary shoring <br /> is deferred for design by the contractor, the shoring system shall be included in the list <br /> of Deferred Submittals on Sheet SO.0; performance requirements shall be specified per <br /> IBC Section 1603.1.8. <br /> c. The shoring system shall be included in the Special Inspection Schedule on Sheet SO.0 <br /> per IBC Section 1705.1.1. <br /> d. The drawings shall specify temporary construction conditions as needed (e.g., no vehicle <br /> load on the parking deck during repairs, etc.). See IBC Section 107.2.1 <br /> 9. Detail 16/S.10 specifies replacement of the vertical support connection for precast panels. <br /> The following comments shall be addressed: <br /> a. Calculations substantiating the design of the connection shall be submitted for review. <br /> See IBC Section 1604.1. <br /> b. Specify shoring requirements as needed for the panel. Shoring requirements shall be <br /> similar to those stated in Comment 8 above. Where shoring is not provided, calculations <br /> shall substantiate the remaining connections are adequate for the temporary condition. <br /> 0 3200 Cedar Street CD 425.257.8800 0 everettpw@everettwa.gov <br /> Everett,WA 98201 425.257.8882 fax everettwa.gov <br /> L1 I s <br />