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• <br /> • <br /> 607 Riverside Road <br /> B1909-009 <br /> City Review Comment Response <br /> c. Continuing with the previous comment, modifications to the diaphragm system may be <br /> required if the modified walls are not adequate to perform as part of the LFRS. <br /> Calculations and details for diaphragm modifications shall be submitted for review as <br /> needed. See IEBC Section 807.2. <br /> Please see attached response letter from AHBL. <br /> 2. The HSS girts per Elevation 1/S1.1 appear to require three connections at the top and bottom <br /> per Section 2/S1.1, with the bottom connection located within 3-1/2 inches of the bottom <br /> panel edge. The structural calculations do not consider this edge distance. Revised <br /> calculations substantiating the design including all edge distances shall be submitted for <br /> review. See IBC Section 1604.1 and 1901.2, and ACI 318-14 Section 17.7. <br /> Please see attached response letter from AHBL. <br /> 3. The HSS girts per Elevation 1/S1.1 change to out-of-plane load path from uniform to <br /> concentrated loads between the wall panels and the supporting foundation and roof <br /> diaphragm. Revised connections shall be provided at the top and bottom of the panels to the <br /> supporting structure. The diaphragm connection shall be designed for forces per ASCE 7-10 <br /> Section 12.11.2.1; ka per Equation 12.11-2 shall consider the diaphragm span between <br /> supporting walls, not the width of the modifications or the spacing of the girts. The roof <br /> diaphragm shall be modified to provide subdiaphragms as needed to develop the connection <br /> load into the diaphragm. See IBC Sections 1604.1, 1604.4, and 1613.1. <br /> Please see attached response letter from AHBL. <br /> 4. Section 2/S1.1 shows the typical girt connections to the existing concrete wall panels utilizing <br /> expansion anchors. See IBC Section 107.2.1. The following comments shall be addressed: <br /> a. The connection design is based on a minimum panel edge distance of 7-1/2 inches. This <br /> distance shall be specified. <br /> b. The section specifies a minimum embedment of 4-1/2 inches. This is the effective depth <br /> after installation and tightening. However, the nominal anchor depth (i.e., minimum hole <br /> depth and anchor length prior to tightening)per the calculations is 5-1/8 inches. The <br /> required embedment shall be clarified to ensure the proper depth is achieved. <br /> Please see attached response letter from AHBL. <br /> 5. Section 3/S1.1 shows the typical connection between orthogonal wall panels. Calculations <br /> substantiating the connection do not appear to be included in the calculation package and <br /> 19-1011 glacier peak-compasspermit review response letter draftCbIll <br />