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Old 11-11-2013, 07:47 PM   #1
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4x4 deck posts splitting


Hi everyone,
My apologies if this is the wrong forum or if this has been answered elsewhere, but I cannot find a post on it. I have a two-story deck and the 4x4 pressure treated posts are starting to split and twist. I know that this tends to happen and I don't think that it is dangerous, but I would like to stop or at least slow it down. I have seen some talk about using epoxy or putty in the cracks. Is that a good idea? Also, should I consider sealing the posts, and if so, should I leave one side unsealed to avoid trapping in moisture? Some of the posts get sun for about 2/3 of the day, others get none. I am in Georgia, so it generally does not get too cold, but it can get quite warm and humid in the summer. Thank you so much.

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Old 11-11-2013, 08:02 PM   #2
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4x4 deck posts splitting


#1 A second story deck never should have been just 4 X 4's!
It's called checking, it's caused from uneven drying.
Nothing you can do about it, just the nature of the beast.
Never try to fill the cracks.

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Old 11-11-2013, 08:34 PM   #3
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4x4 deck posts splitting


A sealer will help slow down moisture exchange but will not eliminate it. Even the best sealers need to be applied every 2 years. No epoxy on the planet will help with cracking or checking of a post, don't waste your money.
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Old 11-11-2013, 08:55 PM   #4
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4x4 deck posts splitting


The "deck code" has been modified; reducing the loads on certain species of 4x4 posts; "Commentary page C6
POST REQUIREMENTS
Assuming that identical species will be used for joists and beams, an analysis of Table 3 reveals that a maximum tributary area of approximately 81 71 ft2 will result if southern pine is used (see calculations under FOOTINGS for LJ = 18'-0" and LB = 8'-0" 7'-0" for 2-2x12). This results in a load on the post of 4,061 3,562 lbs. A 4x4 southern pine No. 2 post 10' in height would work in this situation (assuming pinned end fixity). Similarly, for other Table 3 species, assuming joists and beams are the same species, a maximum" etc. from; http://www.awc.org/Publications/DCA/DCA6/DCA6-09.pdf

Should have waterproofed the pt before installation; #3; http://bct.eco.umass.edu/publication...ns-about-wood/

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Old 07-23-2014, 01:48 PM   #5
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4x4 deck posts splitting


Thanks everyone! Sorry, I took so long to answer. I will probably seal at least part of the posts that are exposed to the elements.
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Old 07-23-2014, 02:31 PM   #6
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4x4 deck posts splitting


Not trying to scare you but I'm sure they thought their deck was safe too.

http://www.wfmz.com/news/Regional-Po...party/26854200
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Old 07-24-2014, 01:41 PM   #7
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4x4 deck posts splitting


Quote:
Originally Posted by mako1 View Post
Not trying to scare you but I'm sure they thought their deck was safe too.

http://www.wfmz.com/news/Regional-Po...party/26854200
Quote:
nails were used where there should have been bolts and washers.

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