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

Tacoma Office PSE 708 Broadway Suite 110 PETERSON STRUCTURAL ENGINEERS Tacoma, WA 98402 253.830.2140 February 24, 2023 Paul Gentsch Helion Energy 141575 th St SW Everett, WA 98203 425.495.4215 RE: Helion Energy Shielding Structure Foundation—Structural Observation Report Project#: 2202-0023 Structural Observation Number: 3—Pilaster Dowels & Perimeter Anchor 100%Observation Structural Observation Number: 4—Final Foundation Observation & Pre-Pour Meeting Dear Paul, The following structural observation report has been generated based on our site visits performed at the Helion Energy facility (located at 1313 75th St SW, Everett, WA) on Friday, February 17th, 2023 (SO#3) and Tuesday, February 21ST, 2023 (SO#4). The purpose of the two observations were to: (1) provide initial review of the installation of the pilaster dowels and perimeter anchorage at 100% completion for general conformance with the contract documents and (2) confirm all previously noted out-of-conformance items had been corrected in the field. Confirmation of all corrections was required by Andersen Construction to move forward with the scheduled pour on Wednesday, February 22nd 2023. PSE arrived on site at approximately 2:00pm on Friday, February 17th and met with Hayden Leblonde of Andersen Construction. Installation of the pilaster dowels had been completed and installation of the perimeter templates and anchor rods had been mostly completed. The iron workers were continuing installation of the anchor templates and keyway forms at the outstanding locations. At the time of SO#3, PSE found the condition of the observable structural work to be in general conformance with the construction documents, with the exception of the nonconforming items noted below. The site visit performed on Tuesday, February 21St acted as final verification that all items noted to be out-of-compliance were corrected as noted prior to the concrete pour. The items listed below were confirmed following the completion of SO#4. 1. Action Item 1 (Resolved) — Instances of the #5 stirrup bars with hooked legs that were cut-off or cut-short were observed in some locations.Andersen was instructed to replace these with bars with proper hooks or, if replacement is not possible, lapped with "L" bars. Laps should be tied sufficiently,and splice lengths should be maximized. Remedies were underway at the time of the final site visit. See Figure 2. 2. Action Item 2(Resolved)—One instance of missing anchor bars was noted on the west side of the foundation. The location of the anchor was positioned such that room for hairpin bars was very minimal. This was discussed on site with Andersen and was decided that "U" shaped bars without hooked legs should be installed and cut to length to fit within the available space. The#5 anchor reinforcing bars were installed at the subject anchor at the time of SO#4.The vertical legs were shorter than typical to fit within the available space, and the as-built conditions are acceptable to PSE. See Figure 3. OREGON I WASHINGTON I CALIFORNIA