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Mud Sill and Band Joist Installation

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How your house gets built 👍 #build #learn #framing #footings #construction

What happens here

A pressure-treated mud sill is installed on top of the foundation, secured by the J-bolts which are tightened down. The mud sill serves as a horizontal wooden plate that rests directly on the foundation and acts as a transition layer between the concrete and the wooden framing. Following this, a band joist is installed. The band joist (also known as a rim joist) is a board that runs horizontally around the perimeter of the floor frame, perpendicular to the floor joists. It typically gets toe-nailed into place, securing the framing around the edge.

Goal: Install the mud sill and band joist as the base for the floor system.

Tools and materials

  • Band Joist Model N/A — Representing the perimeter framing member of the floor system
  • Mud Sill Model N/A — Representing the mud sill, secured by J-bolts
  • Pointer Stick N/A — Highlighting different components of the model

What they say

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H-beam, LVL, or whatever your beam's going to be. These posts are installed on your footings and this is the main structure that handles all of your house's load. Now your pressure-treated mudsill This also gets installed on your beam. This sits on your J-bolts and gets tightened down. Then your band joist. This typically gets toe-nailed in place. Now your joists get installed. These get face-nailed from the outside and toe-nailed on the inside. This spans from exterior foundation to interior beam. Now your subfloor gets installed.

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