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#1
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Problem with Warping treated posts
My new house has a back porch. The roof is held up by a couple of 4 x
4 treated posts. Both posts were green when installed. Now, after 6 months, both posts are warping. There is as much as a 1" deflection from the top(or bottom) to the middle. Is there anything I can do about it? These posts have not been stained or sealed. |
#2
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Problem with Warping treated posts
wrote in message ... My new house has a back porch. The roof is held up by a couple of 4 x 4 treated posts. Both posts were green when installed. Now, after 6 months, both posts are warping. There is as much as a 1" deflection from the top(or bottom) to the middle. Is there anything I can do about it? These posts have not been stained or sealed. Probably means they were treated way before they were cured, then finally dried out and warped after installation. Bad lumber. Short of replacing them, the bend is pretty hard to cure, but other than being cosmetically unappealing, probably not yet a worry, structurally. |
#3
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Problem with Warping treated posts
I cant see the porch but deflected wood usualy means to much weight is
on it, and both deflect! |
#4
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Problem with Warping treated posts
According to the lumber yard where we got the posts, they would have
been dried before being treated. However, they were not dried after being treated. Do you think I could force them back straight if I put an I beam on the bowed in side and used a clamp to pull in the center? On Thu, 8 Dec 2005 10:30:16 -0800, "Roger Taylor" wrote: wrote in message .. . My new house has a back porch. The roof is held up by a couple of 4 x 4 treated posts. Both posts were green when installed. Now, after 6 months, both posts are warping. There is as much as a 1" deflection from the top(or bottom) to the middle. Is there anything I can do about it? These posts have not been stained or sealed. Probably means they were treated way before they were cured, then finally dried out and warped after installation. Bad lumber. Short of replacing them, the bend is pretty hard to cure, but other than being cosmetically unappealing, probably not yet a worry, structurally. |
#6
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Problem with Warping treated posts
m Ransley wrote:
I cant see the porch but deflected wood usualy means to much weight is on it, and both deflect! Deflection does indeed imply stress. I don't read this as exceeding the posts capacity, but more of cheap, wet treated lumber trying to "straighten" itself out by bowing. I'd be surprised if there wasn't some twist in there as well. To the OP - how tall is the post? R |
#7
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Problem with Warping treated posts
But we can see what the 4x4 is holding up.
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#8
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Problem with Warping treated posts
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#9
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Problem with Warping treated posts
The easiest way tot "fix" the posts is to replace them. Go to a real lumber yard (if you've got one available) & try to buy some treated 4x4's that are already dry. If dry / treated posts not available, go for the driest you can find (if you or they have a moisture meter available, even better) Ideally you want to buy posts under 19% moisture content, closer to 10% would be better. I have purrchased treated sills (Hem-Fir) that actually dripped liquid when crushed in a vise. Also when selecting the posts, look at the ends. AVOID posts cut from the very center of the tree. Try to get posts with the end grain with a little curvature as possible. Less curve means cut further from tree center. This grain pattern will tend to dry with less cracking, twisting & warping. Another possibilty (but a lot of work) is to "fixture" new wet posts to restrain them while they dry. cheers Bob |
#10
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Problem with Warping treated posts
BobK207 wrote:
The easiest way tot "fix" the posts is to replace them. Go to a real lumber yard (if you've got one available) & try to buy some treated 4x4's that are already dry. If dry / treated posts not available, go for the driest you can find (if you or they have a moisture meter available, even better) Ideally you want to buy posts under 19% moisture content, closer to 10% would be better. I have purrchased treated sills (Hem-Fir) that actually dripped liquid when crushed in a vise. That dripping stuff freaks me out. Sometimes you shoot a nail in and the wood bleeds. It's disgusting - like pus. I like my wood dead, just like nature intended. R |
#11
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Problem with Warping treated posts
On 9 Dec 2005 11:01:59 -0800, "RicodJour"
wrote: BobK207 wrote: The easiest way tot "fix" the posts is to replace them. Go to a real lumber yard (if you've got one available) & try to buy some treated 4x4's that are already dry. If dry / treated posts not available, go for the driest you can find (if you or they have a moisture meter available, even better) Ideally you want to buy posts under 19% moisture content, closer to 10% would be better. I have purrchased treated sills (Hem-Fir) that actually dripped liquid when crushed in a vise. That dripping stuff freaks me out. Sometimes you shoot a nail in and the wood bleeds. It's disgusting - like pus. I like my wood dead, just like nature intended. R ROFL I hope you never cut your finger when you are working...... |
#13
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Problem with Warping treated posts
wrote:
Do you suppose I can straighten them in place with an I beam set on the bowed in side and a clamp in the middle? On Thu, 08 Dec 2005 20:21:20 GMT, wrote: Do you think I could force them back straight if I put an I beam on the bowed in side and used a clamp to pull in the center? Why would you expect a different answer when you're asking the exact same question? It's time to move on to plan B, or at least question B. R |
#14
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Problem with Warping treated posts
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#15
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Problem with Warping treated posts
Are the posts only bowed in one principal axis? that means, when viewed while facing one side it looks straight, when viewed from 90 degrees off the first view , it looks bowed if only bowed about one principal axis (like a bowed yard stick) you COULD straighten it but IMO it would less time, effort & material cost to replace them Do you have an appropriate steel member to use as a strongback? and a bunch of clamps? a better question is why are they bowed? are they over loaded? cheers Bob |
#16
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Problem with Warping treated posts
BobK207 wrote:
Are the posts only bowed in one principal axis? that means, when viewed while facing one side it looks straight, when viewed from 90 degrees off the first view , it looks bowed if only bowed about one principal axis (like a bowed yard stick) you COULD straighten it but IMO it would less time, effort & material cost to replace them I'd change COULD to MIGHT, and use a bigger font so you'd know that it was an extremely remote possibility. Once they're straightened - if it can be done without cracking them - what is holding them in place? Memory? Their memory of being bowed is a lot more urgent than their memory of being straightened. Without bracing or leaving the straightening mechanism clamped on for a _long_ time the chances are nil. Do you have an appropriate steel member to use as a strongback? and a bunch of clamps? a better question is why are they bowed? are they over loaded? The OP mentioned these posts were supporting the roof. Why would you assume that the designer undersized the posts? R |
#17
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Problem with Warping treated posts
The post is 9 feet
On 8 Dec 2005 14:27:13 -0800, "RicodJour" wrote: m Ransley wrote: I cant see the porch but deflected wood usualy means to much weight is on it, and both deflect! Deflection does indeed imply stress. I don't read this as exceeding the posts capacity, but more of cheap, wet treated lumber trying to "straighten" itself out by bowing. I'd be surprised if there wasn't some twist in there as well. To the OP - how tall is the post? R |
#18
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Problem with Warping treated posts
wrote:
On 8 Dec 2005 14:27:13 -0800, "RicodJour" wrote: m Ransley wrote: I cant see the porch but deflected wood usualy means to much weight is on it, and both deflect! Deflection does indeed imply stress. I don't read this as exceeding the posts capacity, but more of cheap, wet treated lumber trying to "straighten" itself out by bowing. I'd be surprised if there wasn't some twist in there as well. To the OP - how tall is the post? The post is 9 feet Is there any twist in the post? A 9' tall 4"x4" post is not a great idea. Too slender. Some people clad them in 1x for appearances and to help keep them straight. Other people would use a larger post, or a treated LVL. http://www.trusjoist.com/PDFFiles/2111.pdf It my opinion, backed up by the current situation, it was the wrong thing to use. Doesn't make sense to me to expend valuable effort to make an attempt to fix faulty materials. Particularly attempts with little chance of success. R |
#19
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Problem with Warping treated posts
R-
I think you answered your question to me........ ""Why would you assume that the designer undersized the posts? " I didn't necessarily assume the designer undersized the posts...... designers & engineers make mistakes and contractors do sometimes cut corners. Rather than just telling him how to straighten or replace the posts I thought it prudent to dg a little deeper as to why they're bowed. I haven't seen that many bowed posts in my experience, so w/o seeing this installation (or pictures) it seemed reasonable to ask if they were maybe overloaded. It could have been a boot legged install (I know he said "my new house, maybe new to him but not new) Also I've seen new houses (custom design & engineered) with grossly undermized members & major deflection issues, so it does happen. wrt to my use of COULD, I really meant "he possibly could". I know I could (definitely) straighten them, if for no other reason but to prove it could be done. but in his situation I'd make sure the member was correctly sized & then replace the bowed posts with straight one........ quickest & cheapest way cheers Bob |
#20
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Problem with Warping treated posts
BobK207 wrote:
R- I think you answered your question to me........ ""Why would you assume that the designer undersized the posts? " I didn't necessarily assume the designer undersized the posts...... designers & engineers make mistakes and contractors do sometimes cut corners. Rather than just telling him how to straighten or replace the posts I thought it prudent to dg a little deeper as to why they're bowed. I haven't seen that many bowed posts in my experience, so w/o seeing this installation (or pictures) it seemed reasonable to ask if they were maybe overloaded. It could have been a boot legged install (I know he said "my new house, maybe new to him but not new) Also I've seen new houses (custom design & engineered) with grossly undermized members & major deflection issues, so it does happen. wrt to my use of COULD, I really meant "he possibly could". I know I could (definitely) straighten them, if for no other reason but to prove it could be done. Hmmm, seems we have a horse race! Too bad we can't have two identical post installations and see who's "right". I have my hunches. but in his situation I'd make sure the member was correctly sized & then replace the bowed posts with straight one........ quickest & cheapest way Not having seen the situation, I can't say for sure, but you may very well be right. As long as the post is a simple installation with a post cap and base, it would be pretty trivial. If the installation is more complex with a deck wrapping around the post and/or beams let into the sides, it would obviously be much more complex to swap out. R |
#21
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Problem with Warping treated posts
This is my case. Deck wrapped around and stick framed roof beams
connected at top, Hard to replace. On 10 Dec 2005 14:51:51 -0800, "RicodJour" wrote: BobK207 wrote: R- I think you answered your question to me........ ""Why would you assume that the designer undersized the posts? " I didn't necessarily assume the designer undersized the posts...... designers & engineers make mistakes and contractors do sometimes cut corners. Rather than just telling him how to straighten or replace the posts I thought it prudent to dg a little deeper as to why they're bowed. I haven't seen that many bowed posts in my experience, so w/o seeing this installation (or pictures) it seemed reasonable to ask if they were maybe overloaded. It could have been a boot legged install (I know he said "my new house, maybe new to him but not new) Also I've seen new houses (custom design & engineered) with grossly undermized members & major deflection issues, so it does happen. wrt to my use of COULD, I really meant "he possibly could". I know I could (definitely) straighten them, if for no other reason but to prove it could be done. Hmmm, seems we have a horse race! Too bad we can't have two identical post installations and see who's "right". I have my hunches. but in his situation I'd make sure the member was correctly sized & then replace the bowed posts with straight one........ quickest & cheapest way Not having seen the situation, I can't say for sure, but you may very well be right. As long as the post is a simple installation with a post cap and base, it would be pretty trivial. If the installation is more complex with a deck wrapping around the post and/or beams let into the sides, it would obviously be much more complex to swap out. R |
#22
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Problem with Warping treated posts
Now that we're getting more info about the install.............looks
like straightening might be easier? OP- You didn't answer my questions about the bow; simple single axis? bowed in two directions? are we SURE they're not overloaded? If they're only bowed an inch in one direction, it can be straightened; SLOWLY I'd use a minimum 4x4 steel square tube as a strong back but how do we get them to stay straight????? (btw two 2x6's screwed to the straighened psot would take out about 70% of the bow) maybe get them saturated wet before straightening? a little wood bending strategy? straighten & then let them dry out are we sure this is easier than replacement? how about just living with it? good luck Bob |
#23
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Problem with Warping treated posts
BobK207 wrote:
Now that we're getting more info about the install.............looks like straightening might be easier? OP- You didn't answer my questions about the bow; simple single axis? bowed in two directions? are we SURE they're not overloaded? I've asked him about the twist twice. He's being pretty selective about what he deems worthy of an answer. R |
#24
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Problem with Warping treated posts
maybe he's shopping an answer?
a lot of folks do that or by witholding information they think they're "helping" by "simplifing" the problem; problem is, if they need to ask thye probably don't know which facts are importatnt & which aren't inadequate problem description / definition usually leads to a sub-optimal (or wrong) answer cheers Bob |
#25
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Problem with Warping treated posts
I must apologize. I am not shopping an answer. I want advice. I am
in a brand new house. I had it built by the most respected contractor in our area. There is no twist. Only a deflection in one direction and both in the same direction. One post deflects 1/2" in the center. The other deflects 3/8". My principal concern is that the deflection is from overload. I think these posts only bear about 1/4 of the weight of a stick framed porch roof with fiberglass shingles. It is in a corner of a wing protruding from the house. Any advice would be appreciated. I appreciate your willingness to respond. Thanks On 11 Dec 2005 07:56:15 -0800, "BobK207" wrote: maybe he's shopping an answer? a lot of folks do that or by witholding information they think they're "helping" by "simplifing" the problem; problem is, if they need to ask thye probably don't know which facts are importatnt & which aren't inadequate problem description / definition usually leads to a sub-optimal (or wrong) answer cheers Bob |
#26
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Problem with Warping treated posts
wrote:
I must apologize. I am not shopping an answer. I want advice. I am in a brand new house. I had it built by the most respected contractor in our area. There is no twist. Only a deflection in one direction and both in the same direction. One post deflects 1/2" in the center. The other deflects 3/8". My principal concern is that the deflection is from overload. I think these posts only bear about 1/4 of the weight of a stick framed porch roof with fiberglass shingles. It is in a corner of a wing protruding from the house. Any advice would be appreciated. I appreciate your willingness to respond. Fookin' right you should apologize for wasting people's time. Your original post said a 1" deflection, now it's half that or less? Sheesh. The deflection is not from overload. It's a brand new house, ask the builder. R |
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