How to Anchor Deck Stairs to Concrete

Many different companies that specialize in the construction industry produce hangers that can be utilized to securely attach stair stringers to concrete. These hangers provide a range of adjustments that allow them to fit a variety of different types of wood-structured stairs. After being affixed to the trailing edge of the stringer, the hangers are subsequently bent to conform to the trailing edge's contours. When you initially begin to attach the hanger to the concrete structure, you will start by using masonry screws. After that, you may slide a stair stringer into place and secure it by nailing or screwing it into the treads. It is not necessary to install a ledger board before the hangers, which will save you both time and money when you are working on the project.

Stair stringers must always land on a surface that is both level and free of standing water. If you are going to be landing on a concrete pad or a patio, this should not be a problem for you. However, if you are landing in the yard, you could want to put paver blocks or fill the space with compacted gravel to improve drainage. This is especially important if you are landing on the grass. Make certain that you are using it in all of your sentences. wood that has been treated with a pressure treatment that has a 60-retention rating and is rated for ground contact.


Read more: Extra Support for Long Stair Stingers


To protect against frost heave, you need to ensure that the stringer bases have footings installed underneath them. This is not always necessary, but it is something that we strongly recommend doing. After installing frost footings, you will be able to construct a stable ground connection by utilizing a concrete anchor, base plate, and short post. At the bottom of every set of stairs, there must be a landing space that is at least 3 feet by 3 feet in size. The ground may qualify if it can meet the conditions.


Steps to Anchor Deck Stairs to Concrete


Step 1

Place the stringer on the concrete in the location where it will be secured later. To leave traces on the concrete, tracing the outside edge of the stringer with a pencil is the best way to do it.


Step 2

Place the side tabs of the adjustable hanger so that they rest against the inside face of the stair stringer. Hold the adjustable hanger to the back edge of the stair stringer. Adjustable hangers should be positioned so that the top edge of the hanger is flush with the top edge of the stringer. The bottom edge of the hanger should be bent such that it molds to the bottom of the stringer.


Step 3

Take off the hanger, and place it so that it is resting on the concrete. Place the adjustable hanger so that the top and side edges align with the traced contour of the stringer. Make a small mark inside each hole with a pencil to show where the pilot holes for the masonry screws are to be drilled.


Step 4

Utilizing a hammer drill that is fitted with a masonry bit with a diameter of 5/32 inches, make holes that are 2 inches deep and are located at the very top and bottom markings. It is recommended to use a bristled-wire pipe brush or compressed air to thoroughly clean up the holes.


Step 5

Maintaining the adjustable hanger in place against the concrete while aligning it with the holes is required. To keep the hanger from moving while it's being used, you can use an electric screw gun to drive masonry screws that are 1 12 inches long and 3/16 inches in diameter into the two holes. By pressing the stringer up against the adjustable hanger, you can make certain that it is positioned correctly and safely.


Step 6

Remove the stringer, then use the hammer drill and a bit with a diameter of 5/32 inches to drill out the remaining holes, each of which should have a depth of 2 inches. Place a masonry screw with a diameter of 3/16 inches and a length of 1 12 inches into each hole, and then use the electric screw gun to tighten the screws.


Step 7

Position the stringer so that it is pressed up against the adjustable hanger that has been bolted into the concrete. Use screw connectors measuring 10d, 16d, or 1-1/2 inches in length to secure the adjustable hanger to the bottom face of the stair stringer. One screw connection should be inserted through each pre-drilled hole in the adjustable hanger's bottom and side tabs.


Step 8

Repeat Steps 1 through 7 for each stringer.

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