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Building Detached Pergola On Concrete, Need Advice!

 
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Old 09-24-2010, 11:41 AM   #21
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Re: Building Detached Pergola On Concrete, Need Advice!


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Originally Posted by Willie T View Post
Why does it seem that deck surface mounted posts are almost the first solution many people head for?

He clearly has 16" of vertical support anywhere around three sides of that patio. Why not anchor posts laterally from their sides into the blocks? This would assume, of course, that those blocks were poured solid.

Maybe another option?

Attach a 2x12 full length ledger to the block up tight to the lip of the over hang. Then do as Willie mentioned but also sink the 6x6's into the ground. Attaching the 6x6's to the ledger and not the block would spread the load.
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Old 09-26-2010, 02:17 AM   #22
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Re: Building Detached Pergola On Concrete, Need Advice!


Thanks for the diagram.....I could be wrong (I'm no engineer) but it looks like 18" of it is below the slab going into the ground I'm assuming? In my case it would be going through 4" of concrete (praying I didn't hit the rebar on the way by) then into compacted stone. Also, it looks like it goes up the post up to 3 feet.....That is the exact part the brackets I'm finding seem to be lacking....they are all very short on the sides which doesn't seem like they could provide enough support. Some of Simpsons attach with nails, and others with 2 bolts (which makes me feel better). I think both of theirs attach with just one big bolt in the middle, then I've seen other brackets that attach with 4 tapsons at the corners? More holes, but not as big as the single bolt design.
Someone in here mentioned the Titan , which I think attaches with 8 tapsons . It has a metal post going up a few inches that you drill a hole in the post with a hole saw and it gets inserted into the post. (looks pretty good, but used for porch rails in the video I saw)
So many choices but none that say for this kind of application.
I think I'm going to talk to the contractors desk at home depot in a couple days and see if they can work this thing up for me....Problem is, their selection is much more limited that what I can find online.
If you know the bracket in your diagram, please send me the info so I can look up more about it.
Thanks again!
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Old 09-26-2010, 06:56 AM   #23
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Re: Building Detached Pergola On Concrete, Need Advice!


HD are you kidding me!
We are giving you sound good advice and you’re doing business thru them. You should be doing business thru a real lumber yard with real experienced tradesman not some “I couldn’t make it in the field” guy behind the counter

Last edited by festerized; 09-26-2010 at 07:02 AM.
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Old 09-26-2010, 07:25 AM   #24
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Re: Building Detached Pergola On Concrete, Need Advice!


Aaron

Thanks for the idea but don't think that will work in this instance.
For one reason is that, if you look closely at the photo of the site, each , would be landing on a different surface. Only one side goes down to the ground, the other would land on the driveway.
Not to mention that it would look terrible.
I'm trying really hard to keep this a free standing structure but I guess if I get this done and find that it's wobbly then I may have to attach a ledger board to the house and go ahead and sturdy it up that way. I'll just have to be careful to keep that in mind when placing the back posts.

Thanks for the idea though.
I was really hoping there would be someone out there that has build one of these in a similar location that can tell me what they used.
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Old 09-26-2010, 08:41 AM   #25
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Re: Building Detached Pergola On Concrete, Need Advice!


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Originally Posted by RDBD View Post
I'm going to talk to the contractors desk at home depot in a couple days and see if they can work this thing up for me....
HAHAHAHAHAHAHAHAHAH...........now that's funny!

Quote:
Originally Posted by RDBD View Post
I was really hoping there would be someone out there that has build one of these in a similar location that can tell me what they used.
deckman has built several of these and he did tell you what he used...you just didn't like the answer 'cuz his brackets would cost half your budget. No, no one here has built something like this for under $1,000.
I'm sure HD will have the perfect, strong, low-cost solution.....NOT!

Mac
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Old 09-30-2010, 07:26 PM   #26
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Re: Building Detached Pergola On Concrete, Need Advice!


You can lead a horse to water, but you can't make him drink.
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Old 10-01-2010, 02:55 PM   #27
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Re: Building Detached Pergola On Concrete, Need Advice!


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Originally Posted by RDBD View Post
I think I'm going to talk to the contractors desk at home depot in a couple days and see if they can work this thing up for me....

My new tagline....
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Old 10-06-2010, 09:35 PM   #28
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Re: Building Detached Pergola On Concrete, Need Advice!


Went to a local lumber yard (not HD) and went over my plans.
Suggested the same post mounts I'd been looking at and went through plans with me. Agreed that knee braces should take care of any concerns I had about sway and about the post mounts being inadequate. I'm feeling confident that this will be fine.
This "horse" is going to just take her chances.
At least I had the foresight to take my time in planning this vs. just rushing into this. Unless a tornado hits, I don't think this thing is going anywhere.
Quite the mob mentality starting here...I can't believe people take the time to log in just to make a smart remark.
Also not sure why I keep checking back just to read them.
Some of you must really be super busy "masters of your trade" to have so much time on your hands.
To those who have actually given real advice, I do appreciate it.
I'll continue to post as I work through this project for those who care to follow.
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Old 10-06-2010, 09:44 PM   #29
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Re: Building Detached Pergola On Concrete, Need Advice!


Quote:
Originally Posted by RDBD View Post
Went to a local lumber yard (not HD) and went over my plans.
Suggested the same post mounts I'd been looking at and went through plans with me. Agreed that knee braces should take care of any concerns I had about sway and about the post mounts being inadequate. I'm feeling confident that this will be fine.
This "horse" is going to just take her chances.
At least I had the foresight to take my time in planning this vs. just rushing into this. Unless a tornado hits, I don't think this thing is going anywhere.
Quite the mob mentality starting here...I can't believe people take the time to log in just to make a smart remark.
Also not sure why I keep checking back just to read them.
Some of you must really be super busy "masters of your trade" to have so much time on your hands.
To those who have actually given real advice, I do appreciate it.
I'll continue to post as I work through this project for those who care to follow.

Thicken up your skin a bit! You haven't been on here long so you'll just have to take a little to get a little. There are certain key statements you and other people like you say that trigger the responses you're getting. Don't take it personally, that's just the price you have to pay for free help. I'm actually surprised this thread wasn't closed. Going to a real lumber yard was a good move though. Good luck.
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Old 10-10-2010, 09:51 AM   #30
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Re: Building Detached Pergola On Concrete, Need Advice!


Your right...I apologize.....I was tired when I logged on, hoping someone who had used one of these "store bought" mounts, and instead only found what u see above.
I'm new and I'll take my lumps.
I do appreciate all the good advice but there is almost always more than one way to do things and it would be impossible to incorporate everyone's suggestions.
Considering the amount of weight that will be sitting on these posts, and knee bracing, I think I should be ok (I hope)...and if not, then can always add ledger to the house after to secure.
I've narrowed it down to one of 2 post mounts...Either the Simpson ABU66 (highest load/uplift ratings of Simpsons mounts) or the Titan anchor system someone mentioned in this post.
Simpsons attaches with a single 5/8" anchor bolt and Titan has a hollow tube that gets inserted into the wood by using a 1.25" hole saw and attaches to concrete with 6-8 -19/64" x 3 1/2" GRK Caliburn Concrete screws per anchor. I think the titan looks like the better of the 2, but it seems that it would be very difficult to drill the hole in the end of 8' posts..(any advice on this part would be great if agreed that this is the better of the 2)
Unfortunatley, I can't post URL's to these mounts.
Still trying to get the 6x6 post sleeves so in the meantime, I am working on coloring Quikwall to coverup the cinderblock foundation on the patio which will be done this week and hope to start the Pergola soon after....I hope this post doen't get closed out in the meantime because I'd like to post photos when I get this all done and let anyone who's interested know how it goes. Surely there are others that this can help!
Thanks again for all the good advice!
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Old 10-10-2010, 10:07 AM   #31
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Re: Building Detached Pergola On Concrete, Need Advice!


I like the ABU 66.

Andy.
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Old 10-10-2010, 10:33 AM   #32
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Re: Building Detached Pergola On Concrete, Need Advice!


Just as an FYI, I've seen really high winds reek havoc on those Simpson ABU66's set in a much stronger footing than you're going to achieve.

Knee bracing and everything still allowed the structure to move and ultimately to bend the bracket and eventually break the 5/8 anchor bolts. In a few places the concrete broke and the anchors pulled out.

This was called the wind storm of the century, but it still made me rethink this option ever since.

Just sayin'.

Last edited by dprimc; 10-10-2010 at 07:40 PM.
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Old 10-14-2010, 09:01 AM   #33
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Re: Building Detached Pergola On Concrete, Need Advice!


Really? And here I thought the Titan looked like the better of the 2.
The thought of the ruining the concrete scares the hell out of me. If I could only find a way to make the lexan roof easily removable while still preventing leaks when it's on, at least then I could take it off in winter and when strong winds are in the forecast and that would help somewhat. Guess I'll keep pondering that one until next spring since it's too late in the year to bother installing that part for this year.

Thanks for posting the photo of the Simpson for me...can't seem to do it
(to view the Titan, just google "titan post anchor")

The Titan attaches with:
Caliburn Pan Head concrete screws made by GRK which are second to none and have over 2100 lbs of pull out power per screw. (copied from Titan page)

It's these vs. the single 5/8" that the Simpson attaches with.

Problem I now have is that it looks like I'm going to have to use a 5x5 post sleeve, since no one around here can get 6x6 sleeves (only 4x4 which is too wimpy).....Lumber yard said they could plane down the 6x6 posts to fit for me....Since the Simpson model above fits outside the post, don't think it'll work...Looks like I may have to use the Titan for that reason, since it attaches to post from underside.

And I thought this was going to be easy
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Old 10-14-2010, 10:25 AM   #34
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Re: Building Detached Pergola On Concrete, Need Advice!


The Simpson is probably the better choice in terms of how it attaches to the post--screws running across the grain grab better than anything running parallel. Cosmetically, the Titan wins hands down, and isn't really hard to install.

IF, and that's a big if, you can stabilize the structure via bracing so that it doesn't rack the posts in the wind, either one would be quite sufficient to handle any reasonable uplift IMO.
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Old 11-18-2010, 11:25 AM   #35
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Re: Building Detached Pergola On Concrete, Need Advice!


Just thought I'd stop back in to say that unfortunatley this project had to be postponed until spring since it is now just too cold to paint...I'm on to updating a kitchen instead but will be getting back to this project just as soon as it's warm enough in the spring. I do appreciate all the good advice and hope you'll all check back when I do!
Thanks!
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Old 03-28-2015, 10:16 AM   #36
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Re: Building Detached Pergola On Concrete, Need Advice!


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I've done several free standing pergolas & pavillians. I have a welder make custom post base that go into the concrete when poured, too late for that now tho. You could probably use the same type thing without the J-bolts welded to the base plate bottoms. 1/4" steel plate 12"x12", have two sleeves welded going up the sides of the post about 18" with 3 - 1/2" holes drilled in them for bolts to go thru the post. In your case drill 4 -1/2" holes, one in each corner of the base plate for wedge anchors to be installed into the concrete. I perfer to wrap the bottom of the post with a partial masonry column or wood to cover the post base, but you don't have to if you have a good enough welder.

If you look on my site you can find a pic of a pavillian I built for a neighborhood park back in early 90's. It's still there doing fine & we have some bad storms roll thru here. One of those pics shows those post base pretty well as I did not wrap them.

Those post base are not cheap tho, last ones I had made cost 100.00 a piece, but they will hold up like no other.

Other that you could put handrails between the post to sturdy it up or build knee walls with siding between the post.
do you have a rough sketch of these welded brackets?
I'm building a pergola with same 6x6 posts, and we have a weld shop we could use
please let me know
thanks
tim

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