5208 S 2ND AVE 2021-07-13 - Laserfiche WebLink

Capital Architects Group i>t 2813 Rockefeller Ave. Everett,WA 98201•ph:425.317.8017 •fax:425.317.8489 repaired/replaced in like kind,without design modifications. Replacement of the bridge falls under the definition of"Repair" "The reconstruction or renewal of any part of an existing building for the purpose of its maintenance or to correct damage." Further,the design team has determined in accordance with the IEBC it is "Technically Infeasible"to provide IBC 1012.6 landings between the parking and the building. There is simply not enough distance between to add landings.The bridge will be replaced maintaining existing slope and run. Regarding Tony Lee's letter of January 10, 2001,the design team has concluded current codes concur with the determination that the second floor is not required to be accessible. Mr.Yestal,the building owner,is involved in this response and agrees with the designer-of-record to proceed as above. These conclusions and direction of action will be reiterated in our full response letter to the B2003-40, First Building Review dated April 8, 2020. 3. The bridge is connected to the existing building with an isolation joint per Detail 3/S3.1. See additional comments above in the"Structural"section of this letter for additional information. The minimum required gap should be specified in the detail. See IBC Section 1613.1 and ASCE 7-10 Section 12.12.3. Response: Refer to revised Sheet 3 -3 Detail E2. 4. The bridge Section on Sheet 2-of-3 specifies 0.5-inch diameter horizontal guard rails at a 4.5-inch spacing. The guard rails are required to be spaced to prevent passage of a 4-inch sphere. The provided gap between the rails equals this spacing and should be reduced. See IBC Section 1015.4. Response:%2" schedule 40 pipe has an outside diameter of 0.840". Pipes placed on 4.5"centers will result in a passage gap of 3.66" 5. The bridge Section on Sheet 2-of-3 includes rails located 3.5 inches above the deck surface. The first rails should be located 4 inches above the surface. In addition,the section should specify that the deck extend under the rails to prevent a horizontal gap between these elements. See IBC Section 1012.10.1. Response:The second sentence of IBC 1012.10.1 specifies that a curb shall be no less than 4"in height.A curb is neither required nor specified for this structure,a horizontal guard rail is used instead,and therefore not subject to the 4"height requirement.The only requirement it must meet is to prevent passage of a 4"sphere. The manufactured width of the deck material is 48",and the width between the bridge trusses is 4'-1",resulting in a %2"gap between the deck and the truss.Therefore,deck will lie under a portion of the%2"schedule 40 pipe guard rail. The guardrail is centered 3.5"above the deck.If the deck extends under any portion of the guard rail,the gap will be significantly less than 4".A dimension callout specifying a 0.840"maximum space between the deck and the bottom chord is added to the section drawing 2-3. 6. The bridge Section on Sheet 2-of-3 should specify that the FRP deck includes a non-slip surface. See IBC Section 1012.7.1. Response:Comment is added to the section drawing 2—3. Sandra Higgins Capital Architects Group Pc 3 I)Page-----