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Step 2 · Install Bottom Support (Optional but Recommended)

If your stairs are tall or will experience significant traffic, it is recommended to provide a solid base. Dig a hole and pour a concrete footing, or attach a treated lumber support block to the ground or a stable existing structure. Ensure the top of the support is level and at the correct height to receive the bottom of the stringers. If using a concrete footing, use a post anchor to connect the stringer to the concrete. If using a lumber block, secure the stringer to the block with appropriate fasteners.

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Step 2 · Install Bottom Support (Optional but Recommended)

If your stairs are tall or will experience significant traffic, it is recommended to provide a solid base. Dig a hole and pour a concrete footing, or attach a treated lumber support block to the ground or a stable existing structure. Ensure the top of the support is level and at the correct height to receive the bottom of the stringers. If using a concrete footing, use a post anchor to connect the stringer to the concrete. If using a lumber block, secure the stringer to the block with appropriate fasteners.

Videos for this step

Establish Stair Base SupportAnchor Stringer Base to FootingInstall Supporting Boards and Secure Stringers

Tools and Materials

← Project

How to Build Deck Stairs with Pre-Cut Stringers

Step 2 of 6·7.8 hr left

Attach Stringers to Deck Frame
30 minutes5 items
2
Install Bottom Support (Optional but Recommended)
120 minutes7 items
3
Install Treads
60 minutes4 items
4
Install Risers (Optional)
45 minutes4 items
5
Install Handrails and Balusters
180 minutes8 items
6
Inspect and Finish
60 minutes4 items
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