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Hayden LeBlonde <br /> From: Nick Welling <Nick.Welling@psengineers.com> <br /> Sent: Tuesday, February 21, 2023 5:42 PM <br /> To: Hayden LeBlonde <br /> Cc: Paul Gentsch; Kiel Lunsford; Ike Burkett;John Brohard; Bill Sandbo; Mackenzie Lostra <br /> Subject: RE: Helion - Final Approvals - Mat Foundation Pour 2/22 <br /> Attachments: Re: Helion Form Savers Adjustments; 2023_02_21 SO #4 Final Foundation Observation <br /> (32).JPG; 2023_02_21 SO #4 Final Foundation Observation (43).JPG <br /> Hi All, <br /> Thanks for having us on site today. Following up on Mackenzie's previous email with the latest from Structural <br /> Observation #4. Note that we are working on putting together a formal report, but wanted to get you a follow up email <br /> ASAP since the pour is scheduled for tomorrow morning. For our latest comments and action items, see content from <br /> Mackenzie's previous email below with SO#4 updates/additions in BLUE: <br /> Outstanding items from SO#1 report included: <br /> - Some instances of bent bars near the column footing details were observed to be laid on their sides <br /> at the time of the visit on 1/31/23; these appeared to be resolved.—Previously confirmed/resolved <br /> - Installation of the#8 bar pairs had been partially complete at the time of the visit on 1/31/23; <br /> installation appeared to be completed. - Previously confirmed/resolved <br /> - All improper lap splices appeared to be resolved. - Previously confirmed/resolved <br /> - A majority of the mylar sheets and tie wire scattered throughout the bottom of the footing <br /> appeared to be removed. Some minor instances still remain and a final clean-up should be done <br /> prior to the pour as much as feasibly possible.—By time of SO#4, mylar sheets appeared to be <br /> mostly cleaned up. PSE still recommends doing a final clean-up prior to the pour. <br /> Outstanding items from SO#2 report included: <br /> - Major congestion due to the many lap splices of the#11 bars within the rebar cage region appeared <br /> to be significantly reduced following removal of the#11 bar lines as outlined in the SO#2 report and <br /> RFI #008.All anchors (one exception discussed in following section)were present and in place, <br /> which was the primary concern with the congested bars along the transverse sides of the footing.— <br /> Previously confirmed/resolved <br /> - Previous notes of bar clearance violations appeared to be resolved. No further instances were <br /> noticed.—Previously confirmed/resolved <br /> - Some minor instances of loose weather barrier were still observed. Any instances of loose form liner <br /> or weather barrier should be re-established prior to the pour.—During SO#4,the crew was working <br /> to resolve the outstanding instances. <br /> - Similar comment on minor instances of mylar sheet and tie wire remnants. <br /> Items discussed during SO#3: <br /> - Instances of the#5 stirrup bars with hooked legs that were cut-off or cut-short shall be replaced <br /> with bars with proper hooks or, if replacement is not possible, lapped with "L" bars. Laps should be <br /> tied sufficiently and splice lengths should be maximized.This was discussed on site with Andersen <br /> and remedies were underway. See attached photo#1.—Not all instances had been corrected by <br /> time of SO#4. Crew mobilized to begin installing some additional bars to correct for instances of <br /> cut-off hooked bar legs noted above. <br /> - One instance of missing anchor bars was noticed on the west side of the foundation. Space for full <br /> anchor bar pair was minimal, however, stirrup bars without hooks (vertical leg only) should be <br /> 1 <br />