1313 75TH ST SW 2023-12-11 - Laserfiche WebLink

Helion Energy Shielding Structure -Foundation February 1, 2023 Helion Energy 4. Action Item 4(Resolved)—Side faces of the exposed building column footings were uncovered.Although the contract plans did not show continuation of the joint filler along the sides of the footings,this was discussed with Andersen Construction while on site and the exposed faces were covered with plastic sheeting. All instances appeared to be corrected prior to leaving the site. See Figure 5. 5. Action Item 5 — Installation of the #8 bar pairs was partially complete during the site visit. The remaining pairs of bars should be installed prior to placement of the top mat. See Figure 6. The global placement of the bars was not measured while on site to verify location relative to the future anchor bolt installations. Andersen should confirm locations of the#8 bars prior to placing the top mat. 6. Action Item 6 — Instances of (3) bar splices were observed while on site near the SW slab corner. Splices using(3)bars is acceptable,however,should be re-arranged to not leave gaps between adjacent bars,where minimum bar spacings are not met. It is also advised to add supplemental tie wire locations at the transition point of the splice. See Figure 7. 7. Out-of-Conformance Item 1— Remnants of tie wire and mylar sheets that have fallen to the bottom of the excavated slab area should be cleared and removed prior to the concrete pour. 8. Out-of-Conformance Item 2— Instances of mylar sheets that had fallen out of place were observed at a few locations on the bottom mat. The fallen mylar sheets was discussed with Helion Energy prior to leaving the site and was confirmed that minor instances of missing sheets was acceptable. Additional Notes/In-Conformance Items: 1. General spacing of rebar, on average, was acceptable. 2. Footing dimensions, width, and depth, were acceptable. 3. Lap splice lengths were measured in field and were acceptable. 4. Bottom mat reinforcing at the exposed building column locations except as noted in Action Item 2 were acceptable. Hayden Leblonde of Andersen Construction and Paul Gentsch of Helion Energy were on site at the time of the observation and was notified of the above-mentioned action items.The additional notes were briefly discussed but have been expanded upon in this report with supplemental information. Once action items and out-of- conformance items are updated, repaired, and reviewed the structural elements should be in substantial compliance with the structural contract documents. Thank you and please call if you have any questions. Sincerely, Mackenzie Lostra, PE Project Engineer Peterson Structural Engineers Inc. Sent via email to Paul Gentsch on 2/1/2023 <paul@helionenergy.com> PAGE 12