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Old 08-01-2008, 03:51 PM   #1
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South FL Building Codes


Does anyone do any work in South Florida? I am building a Pergola and would like to know how deep to cement the posts into the ground to comply with Hurricane ordinance. I'm planning on going 4' down with about 4-6" of gravel at the bottom.

Please let me know, if you know!

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Old 08-01-2008, 05:06 PM   #2
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Check with your local code officials. they must have some acceptable standards because of the local concerns for projectiles during hurricanes and tornadoes. It would be a shame for your pergola become a weapon.

Dick

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Old 08-01-2008, 05:18 PM   #3
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Yep, check with the bldg dept. In Mich for every 2 ft above ground you have to have 1 ft in ground. We have an 9ft Pergola with 6X6'S for supports & about 4 ft (+) in the ground. The city comes and measures the depth before you put the posts in too!! We packed it with small pea gravel for 3 feet or so and soil at the top so the pressure treated lumber has some below ground drainage around it. There are 2 swings on it and it isn't goin anywhere! Been up since 1996 and thru a few Mich wind storms, ice, snow etc. Just my experience with our Pergola.
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Old 08-02-2008, 10:11 AM   #4
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You will have more than how deep to set your posts to be concerned with it you are in the HVWZ in S FL. straps / hangers / tie-downs

Hire a structural engr, they might be able to design this so it doesn't look like an erecktor set. Shouldn't be more than $ 300- $ 500. Some will even walk this thru the permitting process for you.

do this with out a permit and they may make you take it down. ( don't comply with your red tag?)
They can kill the power to your house...

Last edited by Big Bob; 08-02-2008 at 10:15 AM.
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Old 08-02-2008, 10:30 AM   #5
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Quote:
Originally Posted by Matty16 View Post
Does anyone do any work in South Florida? I am building a Pergola and would like to know how deep to cement the posts into the ground to comply with Hurricane ordinance. I'm planning on going 4' down with about 4-6" of gravel at the bottom.

Please let me know, if you know!
You can get the answer as soon as you call your code official.
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Old 08-02-2008, 11:52 AM   #6
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Quote:
Originally Posted by Matty16 View Post
I'm planning on going 4' down
FYI, for a nominal 4x4'" post in an 8" dia. hole, I figure 1 cu. ft. of concrete is needed for each 45" of depth.
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Old 08-02-2008, 12:58 PM   #7
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Originally Posted by Yoyizit View Post
FYI, for a nominal 4x4'" post in an 8" dia. hole, I figure 1 cu. ft. of concrete is needed for each 45" of depth.
You're in Maryland, he's in Florida. He has to follow his codes.
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Old 08-02-2008, 01:41 PM   #8
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Originally Posted by Joe Carola View Post
You're in Maryland, he's in Florida. He has to follow his codes.
I wasn't clear. This is a general formula for figuring the space between "square pegs in round holes" if he needed it and if the local codes allow him to sink posts in this way.
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Old 08-03-2008, 07:25 AM   #9
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http://www.floridabuilding.org/BCISOld/bc/default.asp

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