Ledger Board To Concrete Block

A ledger is typically a 2 by 4 or larger piece of lumber attached to a wall or other surface with the use of fasteners such as nails or screws. Yes there are products available for anchoring a ledger board to hollow concrete block foundations concrete masonry unit cmu. One of the benefits of this method is that more rigid minimum and maximum lag screw location configurations associated with mounting to band joists can be avoided.

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The threaded rod used with the anchors must be at least 1 2 inch in diameter and must penetrate the block by at least 3 1 2 inches.

Ledger board to concrete block.

Repeat for each hole making sure that each screw is run all the way in until the head is flush. Ledger boards are used to make joints between lumber structural elements and other materials. Beginning from one end drive one 2 1 2 inch tapcon style concrete screw through each pilot hole in the board and into the cinder block. The fourth technique involves securing the ledger to a concrete foundation wall rather than to the first floor band board.

Ledger board attachment to a solid concrete foundation wall when attaching a ledger board to a masonry wall you will want to first cut the ledger board to size and have two helpers hold it in place so you can drill two holes every 12 through the wood where your bolts will be installed. Line up the pilot holes in the board with those on the block. This wood strip allows other pieces to be joined to the wall with relative ease. On this project the 2 10 joists of the main deck frame sit just about even with the top of the foundation and a landing framed with 2x8s sits atop the main frame serving as a transition point.

Use the horizontal grout joints between the courses of block as a reference and snap a chalk line across the face of the block at the ledger height. 2 stage the ledger board flat on sawhorses. It s also what establishes the overall height and levelness of the entire deck frame. Fastening a ledger to concrete.

There are a handful of manufacturers that produce epoxy and other adhesive anchors that are tested for use in hollow cmu. Hold the ledger board in place on the cinder block. Drill two lengths of ledger board for anchors as described above and anchor them both to the solid concrete stacked to provide a 3 wide ledge along the top edge. When fastening to uneven stone or stucco the ledger board must be supported from beneath with a ledger attached to the solid concrete foundation at the bottom of the wall.

The ledger is not only the structural connection between the deck and the house.

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