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HomeMy WebLinkAboutFLOOR JOIST MEMORANDUM - 21-00265 - 1111 Adams Ct - New SFR Southfork Design Group LLC, 127 E. Main St. Suite 111, Rexburg, ID 83440, 208-852-6236 Memorandum DATE: 1/20/22 TO: Anders Vargason FROM: Ben Anderson, E.I.T., and Ray McDougal, P.E. SUBJECT: Floor Joist Repair, I-joist, 1111 Adams Court, Rexburg Idaho MEMO: Findings: It was found that a floor joist, for the second floor, of the house, referenced above, had been compromised. The joist is near the separating wall of garage and living space. The bottom of the joist had received a notched cut which sliced through the bottom flange of the 11-7/8 TJI 110 I-joist and a couple inches of the webbing. This notch is approximately 3 inches in length. The notch is the middle third of the joist span. The approximate span is 14 feet and 6 inches. The joist spacing is 12” o.c. in this section of the floor. The joist had been previously repaired prior to the involvement of the South Fork Design Group. In-place repairs of the I-joist were performed by the builder or a subcontractor of the said builder. The repairs consist of OSB web fillers on both sides of the I-joist attached with 1-1/4” long staples. The web fillers are approximately 24” wide. Attached to the bottom chord is 2x4’s on each side. The 2x4’s are attached using a 3 inch framing nail. The top chord had a 2x4 attached on only one side, which would be the side facing the interior of the home side of the joist. Southfork Design Group LLC, 127 E. Main St. Suite 111, Rexburg, ID 83440, 208-852-6236 Figure 1. Repaired Floor Joist from Inside Figure 2. Repaired Joist from Garage Side (Just Above Wall, The Top Chord Repair of a 2x4 is Visible) Southfork Design Group LLC, 127 E. Main St. Suite 111, Rexburg, ID 83440, 208-852-6236 Analysis: The OSB web fillers and 2x4 bottom chord gussets are sufficient to compensate for the notch in the I-joist. The gusseting will allow the joist to perform within the parameters prescribed by IRC 2018. Recommendations: No further repairs required. The repairs are sufficient for the loads that will be applied to the I-joist. If you have any questions or concerns, please contact us.