Will my metal poles in a concrete slab bend with side wind
String Bean
,
Wednesday, 4th of August 2010 05:58:28 AM
On a regular industrial concrete slab (maybe 6in deep) l am thinking of String Bean core drilling holes (about 1 1/2 in in diameter) to insert metal poles of Registered User slightly smaller diameter that will stand 6ft tall above the slab surface. Joined: Sunday, 6th of June 2010, 10:18:42 These poles will support a standard panel fence. Posts: 1147 />Does anybody have any idea how much lateral strength it would take to Viewed 15463 times bring down these poles?
l am trying to imagine if they would
bend or if the slab would crack under extreme wind pressures.
/>This is a serious question, so no jokes please.
Birdy
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Thursday, 5th of August 2010 08:54:56 PM
The fence manufacture will have design guides for the design of Birdy the poles. How deep, and what type of posts. If the posts are outside you Registered User should consider surface mounting the posts because drilling into the Joined: Thursday, 10th of June 2010, 12:05:44 concrete and filling the holes is an avenue for freeze thaw damage. Posts: 1981 Viewed 13278 times cheers and good luck!
Mookie
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Friday, 6th of August 2010 10:08:31 AM
when I got back home to southwest Louisiana after hurricane Mookie Rita most fenses broke off the poles or pulled them up so I would say your Registered User poles should be fine Joined: Saturday, 1st of May 2010, 10:04:22 Posts: 238 Viewed 2940 times
Tiger
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Saturday, 7th of August 2010 09:38:48 PM
try to stay inside the slab about a foot or so.if ur lucky you Tiger will get next to some reinforcement(like rebar). When you put the poles Registered User in, plumb them up good & re-fill the gap left in the concrete with some Joined: Thursday, 27th of May 2010, 14:54:50 non-shrink grout. I say this because concrete mixes(in bags) are not Posts: 698 quite as strong as ready-mix concrete(the stuff that ur driveway is made Viewed 15048 times of) & concrete shrinks as it cures. Non shrink grout doesn't-hence the
name. You can buy this by the small container(like 5 lbs) or in a bigger
bag(40 lb) at most hardware stores. The other suggestion I have is to fill
the poles themselves with concrete-to add rigidity. This is a common
practice for parking bolsters that are used to protect buildings & other
objects. The if you do that, you can get away with using a thinner walled
pipe. The only other thing I'd do is auger the hole deeper into the soil,
so you can get the pipe itself in the ground an additional 8'' to a foot-
that will give you added ballast. Hope this gives you a few good ideas!
cuppy cake
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Sunday, 8th of August 2010 08:44:54 PM
sounds like a good plan but i would suggest you drill the holes cuppy cake in the slab twice as big as the pipe you are using and that will give you Registered User room to pour some concrete around the pipes to hold them securely, Joined: Monday, 24th of May 2010, 15:24:31 otherwise your fence will be all flopping around. hope it helps Posts: 257 Viewed 3245 times
BOOKIE BEAR
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Monday, 9th of August 2010 06:50:32 AM
There are certainly some variables that need to be considered BOOKIE BEAR here, the most of which is how close to the edge of the concrete you will Registered User core, how you plan re-fill the holes to give rigidity back to the Joined: Friday, 16th of April 2010, 13:42:21 concrete, how tall the fence is, if there are any openings in the fence to Posts: 1007 let air pass through & the square footage of the slab. Viewed 18825 times
A good wind against a 6' fence that has no way of letting air pass through
will (in fact) crack the concrete if the cores are right next to the edge
of the concrete. BUT, if the square footage of the slab is not that
large, the perpendicular part of the fence will give strength to the part
of the fence that faces the wind. I agree the using rigid, galvanized
conduit will work best, but make sure you have a good plan for securing
these conduits into ur cores. Good Luck
Spectacular =]
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Tuesday, 10th of August 2010 04:12:05 PM
i have metal poles in my back yard and the wind at times gusts Spectacular =] up to 88 miles and hour and i have not had on bend yet Registered User Joined: Wednesday, 12th of May 2010, 17:06:55 Posts: 895 Viewed 17127 times
Curtro
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Wednesday, 11th of August 2010 07:31:49 PM
I cannot see how you can fix a fence panel to metal poles? Curtro Never heard of it being done. The poles you are going to use will bend I Registered User am afraid. The diameter isn't great enough to support a fence. You may Joined: Wednesday, 19th of May 2010, 06:53:04 cause injury to someone who will no doubt sue, so I'd have a rethink if i Posts: 937 was you. Viewed 10228 times
Jock Hamster
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Thursday, 12th of August 2010 09:12:11 PM
they should be fine. Use a thick walled pipe though Jock Hamster Registered User Joined: Tuesday, 1st of June 2010, 22:41:47 Posts: 1510 Viewed 7387 times
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