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Do you know all the retrofit solutions that are available for your soft-story building? The most common solution is to install special moment frames to bolster the existing structure. We’ve written this article to help you understand the nuts & bolts of the two most popular special moment frame (SMF) manufacturers; Simpson Strong Frame and the MiTek Hardy Frame. Soft story retrofitting is about to become a major topic of discussion among property owners in Los Angeles County.
There are over 13,000 buildings affected in the City of Los Angeles alone, and another 1,500 in Santa Monica. The overwhelming majority of them will require steel as a component of the seismic retrofit solution, it can be in the form of a Cantilevered I-Beam Column, or as the more popular Special Moment Frame pictured below. A special moment frame is an engineering solution that consists of structural steel comprised by two large columns, a heavy beam, and lots of connections. They are premanufactured, meaning they are produced in batches at a factory, and can be shipped to the jobsite flat or assembled. This rigid structure is strong enough to withstand tremendous shaking during an earthquake, moment frames will combat the lateral forces experienced during seismic movements, allowing your property and tenants to survive the event. Your building might get some damage, but it will not collapse. This type of Moment Frames have several benefits over a welded Ordinary Moment Frame. The two largest manufacturers of Special Moment Frames include Simpson Strong-Tie and MiTek USA. Property owners are trying to mitigate soft-story retrofit costs by scrutinizing every penny down to the nuts and bolts (pun intended) so it's important that they know what a Moment Frame is. This short article will help you understand the differences between the two most popular moment frame systems. This article is not about the price of soft-story retrofit; but you can learn more about costs by clicking here.
(Simpson Strong Frame SMF installed in San Bruno, image courtesy of Intero Real Estate)
(MiTek Hardy Frame SMF installation, image courtesy of Contractor Supply Magazine)
Both Simpson Strong-Tie and MiTek Systems manufacture Special Moment Frames (SMFs). They are very similar products in both looks and installation, but beyond that they share other similarities.
Just because SMF’s look the same, it doesn’t mean that they are identical. The Simpson Strong Frame and MiTek Hardy Frame are two different systems. Here are their differences.
(Yield Link or “Structural Fuse” pictured above in Orange, image courtesy of Simpson Strong-Tie)
Recommendations:
The two special moment frames share many distinct value propositions. However, my recommendation on is for Engineering designers and property owner to utilize the Simpson strong frame special moment frame. The major factor in this recommendation is based on two factors: the Simpson SMF system allows for the continuous use of both the beam and moment frame, saving the property owner thousands in possible replacement costs. Simpson Strong-Tie’s technical support is world class. Having a team of experts available to help with the retrofit design and field installation process is invaluable.
If you want to learn everything there is to know about soft-story retrofits you'll want to check out our most in-depth article What is a Soft-Story Retrofit? Everything You Need to Know About Retrofits on our newest website. There, you'll be able to access all of our retrofit blog articles, case studies, our retrofit gallery, short videos, and enjoy free access to our full-length soft-story webinars. Our team has developed all this content for property owners like you. It is your destination to learn all about the retrofit process. Bay Cities Construction and Soft-Story Retrofit Pros is here to help answer any questions you may have about your retrofit project. Our team has the experience to Engineer & Build a Cost-Effective Retrofit Solution for your property. Get started today by visiting our website at www.softstoryretrofitpros.com to schedule a free assessment.
For over 15 years Bay Cities Construction has helped hundreds of property owners with their construction needs. When you hire Bay Cities Construction - Retrofit Pros you don’t just hire a contractor, you hire an entire team of Pros with several years of experience. Our team has the expertise to help you with Interior Design, Architectural and Engineering Services, City Representation, Permit Processing, and Construction services. If you think Bay Cities Construction is the right team for you, contact us today. We will help you design, engineer, and build your retrofit project.
Ready to take the next step? We’re certain that Bay Cities Construction is the best general contractor for your project, you can Schedule an Appointment by clicking HERE. We offer a complimentary 1-hour consultation at our office, so you can meet our team and we can discuss soft-story retrofit project.
About the Author:
Alexander Rodriguez, MBA is a licensed contractor with 20 years of construction experience. He has published hundreds of construction related articles and is also an adjunct Professor at Mount Saint Mary University, Los Angeles.
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