Step 5 · Install Handrails and Balusters

Securely attach the bottom of the stair stringers to the deck frame using appropriate fasteners, such as structural screws or bolts. The top of the stringers should already be secured to the deck ledger. If handrails are required by local code, install handrail posts at the top and bottom of the stairs, and potentially at intermediate points for longer runs. Posts should be securely bolted to the deck frame or substructure. Attach balusters to the treads or stringers, spaced according to local building codes (typically no more than 4 inches apart). Finally, attach the handrail to the posts, ensuring it is at the correct height (usually 34-38 inches from the tread surface).