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Optimizing Snap Tie Placement in Concrete Forms

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Learn about hydrostatic pressure, forms and your basement. #learn #concrete #basement #formwork

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What happens here

The presenter explains that due to the increased hydrostatic pressure at greater depths, more snap ties are required at the bottom of concrete forms to prevent them from bursting or deforming. He uses a simple cardboard diagram labeled 'Snap Ties' to illustrate that there should be less spacing between ties at the bottom ('More Bottom') and more spacing at the top ('Less Top').

Goal: Explain the proper density of snap ties in concrete forms based on hydrostatic pressure.

Tools and materials

  • Cardboard diagram — Visual aid to illustrate snap tie spacing
  • Concrete foundation model — Reference for foundation elements

What they say

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The lowest one has the most pressure and as the water column comes down, it still stays that way. Because this pressure increases at the bottom, these braces hold the top from horizontal movement and through your forms you'll have snap ties that holds the bottom together. Snap tie spacing will have to be increased. On the top, you'll have less snap ties and the lower you go, it requires more snap ties. This helps hold the bottom together when there's pressure. Here's your basement or crawlspace. You'll have your footing in block or concrete for your foundation

Auto-generated from the video audio.