The Best Methods For Attaching Structural Hold Downs To Raised Floor Foundations - Engineering Tips

[josecorona]

Muy buenos tus videos podrias hacer mas de este tipo me cerian de mucha ayuda vendiciones🙏

[GrampalettasCamp]

If my foundation consists of helical piers due to proximity to water, how do I tie the building down to the pier?

[bethanyanderson]

I believe these are required in costal areas due to Hurricanes but, in my opinion, should be required across the country. Straight line winds, tornadoes etc seem to popup everywhere nowadays. At the very least, a huffing and puffing big bad wolf. (sorry, I couldn't resist)

[fsoileau]

Hold downs are a part of engineered shear wall design. They are not for the lateral racking forces but the overturning forces in tension.
The manufacturer is the governing engineer for the product, not the building's design engineer or the local building department. Your engineer calcs the total forces applied, select the hardware that meets those forces, and includes it in the plans. Simpson allows an approved coupler nut with 2 inspection holes for thread depth.
The only problem I see with your illustration is that the inspector will want to see a gap between the sill or bottom plate to the hold-down to ensure proper tension and offset of 5 degrees max. This is why hold-downs are never installed close to the bottom plate. You need to install your hold-down 3" higher for every 1/4" you are off of a perfect layout.