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August 2021 #13265 Page #122
Questions Answered: Strong-Wall® High-Strength Wood Shearwall By Karissa Louie
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n this follow up to our July webinar, Innovations in Strength and Versatility: Overview of the Strong-Wall® High-Strength Wood Shearwall, we answer some of the interesting questions raised by attendees.
During the webinar, we discussed the new Simpson Strong-Tie® Strong-Wall high-strength wood shearwall (WSWH), a high-performance, easyto-specify solution for lateral-force resistance in light-frame residential and commercial construction. Its patented, code-listed design provides the highest allowable loads across a wide variety of applications. And it’s fieldtrimmable for maximum design flexibility and customization. In case you couldn’t join our discussion, you can watch the on-demand webinar and earn PDH and CEU credits here. As with our previous webinars, we ended with a Q&A session for the attendees. Our Senior Product Manager, Tom McClain, and our Engineer Supervisor, R&D Caleb Knudson, answered as many questions as they could in the time allowed. Now we are back to recap some of the commonly asked questions and their answers, and the full list is here.
Can we use post-installed anchors for installation if we have an existing footing? It depends on whether your design criteria are based on wind or seismic. For seismic design categories C through F, we must develop the full strength of the anchor to ensure a ductile failure mode. This means precluding the more brittle concrete breakout and bond-strength failures. It’s unlikely that we’d be able to develop the full capacity of a post-installed anchor bolt, especially for near-edge conditions. Alternatively, if the demand force is sufficiently low, we’re able to design the anchorage for omega-level forces. For wind applications, if you can develop the capacity that you need based on your demand load with an adhesive anchor, then, yes, you can use post-installed anchorage. In cases where there’s an existing footing, underpinning is another alternative when the full capacity of the panel is required. Continued next page
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