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awillaum 06-05-2008 07:06 PM

Shakey Deck
Ok, not sure if I spelled that right :eek: But we have a wooden deck that sways just slightly when someone walks on the outside of it - if you walk closer to the house it doesn't - last summer my husband replaced all the floorboards, railings, etc. because the deck is old - the posts are cemented into the ground below - we've had contractors tells us that the deck is sound, just needs a support underneath - I don't really want to pay someone to do what my husband can if that's all that it takes - but was wondering how to support the underneath and stop the movement.


jerryh3 06-05-2008 07:13 PM

What kind of movement are you feeling? Is the deck bouncing up and down, or is it swaying from side to side?

awillaum 06-05-2008 07:16 PM

Thanks for the reply Jerry - it sways (slightly) from side to side... I'm hoping that's the less expensive answer :laughing:

jerryh3 06-05-2008 07:25 PM

You may need to add some diagonal bracing similar to what is in this picture:
Have someone walk heavily on the deck and see if you can notice any movement between the posts and the support beams. You may also need to block between the joists to cut down on lateral movement.

buletbob 06-05-2008 09:03 PM

thats one way.
you could also try this.
find the middle of the outside girder that supports the floor joists and make a mark. then snap a caulk line from that mark to the outside edge of the ledger board that is bolted to the house. same on the opposite side. then cut and install 2x4's nailed or screwed ( two each in each joist) to the bottom of the joists make sure your cut angles are fairly tight. secure to the header and the ledger board. that shoud tighten it up.

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