Stiffen a wobbly deck railing by adding blocks along the rim joist. It's a quick and easy way to firm up the railing.
By the DIY experts of The Family Handyman Magazine:June 2007
Toe-screw blocking to the rim of the deck with three 3-in. deck
screws at both ends.
Deck posts and railings screwed to a single
rim joist feel wobbly because the rim joist
flexes whenever you lean against the railing.
Adding blocking will stiffen the rim joist and
make the railing feel much more solid.
First, tighten any loose bolts and screws. If the post
doesn't have bolts, add them—carriage bolts work
Cut pressure-treated 2-by blocking (the same
width as the floor joists) to fit tightly between the rim
joist and the next joist. Place the blocking directly
behind the post and toe-screw it into both the rim
joist and the neighboring joist. Fasten additional
blocking every 4 ft. along the rim joist.
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.
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