HomeMy WebLinkAboutRE_ Towns on 12th Questions CAUTION: This email originated from outside the City of Renton. Do not click links, reply or open attachments unless you know the content is safe.
Great, thanks Yong. I’ll share this with the contractor. Appreciate it!
Holli H. Heavrin, P.E.
Principal
Core Design, Inc.
From: Yong Qi <yqi@rentonwa.gov>
Sent: Monday, January 29, 2024 1:56 PM
To: Holli Heavrin <HHeavrin@coredesigninc.com>
Subject: RE: Towns on 12th Questions
External Message
Hi Holli,
Thank you for reaching out. Most of these materials changes are acceptable except the 6’’ pipe connecting to CB 13 on sheet C4.11, where the pipe cover will be less than 2’ even it is
not under drivable surface, please keep using DI pipe or choose an alternative material per Table 4.2.1.A2 of 2022 RSWDM.
Per Section 3-11.3 in Appendix K of 2021 Water System Plan, the storm pipes shown as DI due to horizontal separation issue might be able to switch to pressure-rated C900 PVC pipe per
Section 3-11.3 in Appendix K of 2021 Water System Plan. Also, to meet the minimum cover, the storm DI pipe could be able to switch to other pipe materials per Table 4.2.1.A2 of 2022
RSWDM. However, since the north portion of the project site is within Landslide Hazard Areas, FYI, PVC pipes are not allowed per Table 4.3.1.A3 of 2022 RSWDM.
I think showing these pipe materials change on the final as-built plan should be adequate and a revised civil plan might not be required at this moment, but I will double check with
our inspector and get back to you soon.
Thank you,
Yong
YONG QI, PHD, P.E., Civil Engineer III
City of Renton | CED | Development Engineering Division
1055 S Grady Way | 6th Floor | Renton, WA 98057
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(425) 430-7439 | yqi@rentonwa.gov <mailto:yqi@rentonwa.gov>
From: Holli Heavrin <HHeavrin@coredesigninc.com <mailto:HHeavrin@coredesigninc.com> >
Sent: Monday, January 29, 2024 10:15 AM
To: Yong Qi <yqi@rentonwa.gov <mailto:yqi@rentonwa.gov> >
Subject: Towns on 12th Questions
CAUTION: This email originated from outside the City of Renton. Do not click links, reply or open attachments unless you know the content is safe.
Good Morning Yong.
I have a contractor going through the plans for bidding and they brought up a few questions regarding pipe material that I wanted to clarify.
I’ve attached a few sheets from our plans for reference to the questions.
Overall the questions surround the pipe materials being called out.
If you could please review my questions on the attached and let me know I’d greatly appreciate it!
Thanks!
Holli H. Heavrin, P.E.
Principal, Engineering Technical Manager
Office: 425.885.7877 | Cell: 206.697.9474 | www.coredesigninc.com <https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.coredesigninc.com%2F&data=05%7C02%7Cyqi%40rentonwa.gov%7Cc70861
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