2815 BAKER AVE 2023-12-06 - Laserfiche WebLink

c Mt ; D b FEB i= FEB 2 8 2023 info@b2engineers.com a5-3180031(C e t sit' waseqsa - ) CITY Services 02 BAKER BUILDING 2815 BAKER AVE, EVERETT, WA 98201 RESPONSE TO COMMENTS .p� °'�RALti�G`��,� PROJECT NO: 22290 DATE:02/23/23 SS'ONAL ENG PREPARED BY: BASRI BASRI PE,SE 1. The project proposed demolishing a portion of the existing concrete wall to modifying the door opening. See IEBC Section 806.2, and IBC Sections 1603.1, 1604.1, 1604.2, 1604.4, 1901.2, and 1901.5. The following comments should be addressed: a. A structural partial plan for the area around the modified opening should be provided indicat- ing the structure above bearing on the length of wall to be modified (e.g., beams, girders, columns, posts, walls, pilasters, etc.). RESPONSE TO COMMENT a: SEE REVISED 5 OF S-1 SHOWING EXISTING FLOOR FRAMING AT MAIN FLOOR(THE SAME FRAMING LAYOUT AT 2ND FLOOR AND ROOF). THE HEIGHT OF EXISTING MASONRY WALL ABOVE THE CONCRETE HEADER IS INDICATED ON THE PLAN AS WELL b. Section 3/S-1 should be revised to specify the dimensions for the remaining wall section. c. Section 3/S-1 should be revised to indicate the remaining reinforcement. The wall should be scanned to accurately determine the sizes, numbers, and locations of rebar in the wall. See ACI 318-14 Section 27.3.1.2. d. Documentation substantiating the condition and strength of the existing concrete should be submitted for review. See ACI 318-14 Section 27.3.1.3. e. Calculations should be submitted substantiating the flexural and shear capacity of the wall. Note that the wall supports the existing URM wall above that provides a bearing load path for both the upper floors and the roof. f. As an alternative to Items (b) through (e), a new supplemental gravity frame with founda- tions should be installed to support the existing structure. Calculations substantiating the de- sign of the frame and foundations should be submitted for review. RESPONSE TO COMMENT f. : DOUBLE STEEL CHANNEL C8X11.5 HAS BEEN USED TO CARRY THE EXISTING WEIGHT OF THE HEADER, MASONRY WALL AND FLOOR FRAMING. PLEASE SEE ATTACHED CALCULATIONS PAGE 1 AND 2.THE LOADS ARE TRANSFERRED BACK TO EXISTING CONCRETE WALL. PLEASE SEE ALSO DETAIL 3/S-1 2. Plan Note 3/A-1 states that the manufacturer shall provide connections of the lift to the existing structure. The structural drawings are required to provide a sufficient base for the installation of these connections; this is not provided by the manufacturer. Details and calculations providing lateral anchorage and support for the new lift system should be submitted for review. The exist- ing floor system should be modified to provide a load path into the diaphragm to transfer the lat- eral forces. See IBC Sections 1603.1, 1604.1, 1604.2, and 1604.4 RESPONSE TO COMMENT 2 : PLEASE REVISED DETAIL 1 OF S-1 . PLEASE SEE ATTACHED CALCULATIONS PAGE 3 AND 4. II