Introduction to Shear Walls: Understanding Overturning, Racking, and Base Shear

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Published 2023-05-17
Description: In this introductory lesson, we'll talk about the importance of shear walls in building construction and why they are essential in resisting lateral forces such as wind and earthquakes. We'll demonstrate the three forces that wind or seismic exerts on the building, and we'll show you how shear walls on either side, the roof, and even the floor system help to distribute those forces. We'll also explain what racking, base shear, and overturning are and why preventing them is crucial in preventing building collapse. We'll show you how to transfer the inherent rigidity of wood structural panels to the wall to make it more resistant to lateral forces, and we'll discuss the different types of wood sheathing you can use to achieve this. Join us to learn more about shear walls and how they can help protect your building from natural disasters.

Article in the Journal of Light Construction on shear walls

www.jlconline.com/how-to/framing/shear-walls-the-b…

Please remember that I'm not showing the best way to do anything, but just the method that works well for us. Thanks for watching!

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All Comments (21)
  • @engineerjosh794
    I'm a structural engineer! This video was great, and thank you for also sharing the different screenshots from the NDS publications as well! I love it!
  • @timkrouse345
    I work in demolition and you are making my job REALLY difficult. Thanks.
  • @breaklunner
    This was so awesome!!!!!!!!!!! I literally am using this video to help me for my California Seismic Engineering Exam. Thank you so much for breaking this down so that I can understand it better!
  • @chriskatz1152
    I think this video will go far and good for lots of self starters to understand what they are really dealing with
  • @FutureFaz
    I’m a licensed structural engineer in California. This video is fantastic. Great work!
  • @randallrogers8183
    Thanks for staying on site after work hours to educate us. That was incredibly helpful.
  • @rayjackson4547
    I am a carpenter and home inspector for about 40 years. You did a nice simple job of explaining the system
  • @seanlarson8968
    This would be a great practical video to show in an intro to statics engineering course. Very nice example with the simple starting wall. Then get into the individual and total nail shear forces, so nerdy! Love it.
  • @tubewatcher5012
    Thank you for the education. Met with a structural engineer last week to verify load bearing wall and received a significant education that I wish I had received decades ago. Wish I'd have taken my education more seriously and followed engineering.
  • @jasonwrex
    I saw a couple houses collapse in my time as a builder by other builders. It was always from new crews who didn’t understand that you can’t rely on braces to hold an entire house with roof set. Sheathing and decking are your friend, sooner rather than later! Good video.
  • @medicbabe2ID
    0215 and I just sat through an excellent video on shear walls, and learned a lot of new information & terminology. My day is going well already.
  • @stipcrane
    Great presentation. Just learning the terms (Overturning, Racking, and Base Shear) is helpful in understanding better and being able to describe what most of us intuitively know. Construction is full of urban legends regarding the code and engineering. It is wonderful to get the straight scoop from PEs on how various forces act upon structures rather than the BS at lunchtime when framers pontificate about science.
  • @redfo3009
    90% of this is common sense stuff my dad taught me. ❤
  • @Happy-ze4bm
    One of the best videos and most knowledgeable I have seen. Thank you for your great work. you are a awesome framer. God Bless
  • @chipburns4123
    Holy crap! Im getting a shear wall installed in my house immediately.
  • Great stuff. I've been designing homes for over 30 years and have built several in that time, and I was always taught/told that the sheathing should go perpendicular to the studs. This was very enlightening. Thanks for the mini tutorial! Never too old to learn new things.
  • I would love to work for someone like this. This is how you teach the right way
  • @MitzyChrisp
    You’re a terrific teacher. Really appreciate the video! Well deserved sub
  • @Shane-ol1jo
    At the end common sense and long talk short. Thank you for knowledge
  • @evan-edstrom
    Very true about the field nails holding the panel to the framing! I had a project framed with Zip System sheathing where the sheathing got a little wet during construction, and buckled in or out between each stud up to 1/2" in deflection. But the sheet itself stayed firmly attached to the studs.