Anchor - Building Hardware
If we didn't attach the stringers to the base or
concrete foundation, there's a chance that the stairway would fall down
in the future.
Obviously, I can't recommend what type of building hardware or anchors to use for your specific project, but I can suggest that you avoid trying to save money when making your decision.
Make sure that you get a heavy-duty anchor or angle bracket and use the correct bolts to attach the stair stringers to the concrete foundation.
Framing anchors like these might not be necessary when attaching a wooded stair stringer to a wood subfloor.
Stairs / Stair Glossary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z