3" fence posts or 4" fence posts?
Hi, oh learned ones!
I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W |
3" fence posts or 4" fence posts?
"Al-W" wrote in message
... Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W Depends how high it is ! 3" tall no issue 3 Metre tall might be a problem! Sheltered location - probably no issue Cliff top in outer Hebrides - problems ensue ! All parameters needed :) Andrew |
3" fence posts or 4" fence posts?
On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote:
Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. |
3" fence posts or 4" fence posts?
Al-W wrote:
On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. 'All timber'? Is it panelled, if so I'm not sure if 3" posts will be enopugh, even 4" might be marginal. -- Chris Green · |
3" fence posts or 4" fence posts?
On 05/06/17 18:35, Al-W wrote:
Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Use 4" concrete posts set in cement, with concrete gravel boards Then the things won't rot Many thanks Al-W -- "Corbyn talks about equality, justice, opportunity, health care, peace, community, compassion, investment, security, housing...." "What kind of person is not interested in those things?" "Jeremy Corbyn?" |
3" fence posts or 4" fence posts?
Al-W wrote:
On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. Al-W 3" definitely not enough! 4" minimum unless you enjoy replacing broken posts. ;-) Tim -- Please don't feed the trolls |
3" fence posts or 4" fence posts?
On Mon, 5 Jun 2017 10:52:01 -0700 (PDT), Al-W wrote:
On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. Concrete posts, set in concrete (postfix/postcrete) and then clad in rough sawn wood if someone objects to the bare concrete look. -- |
3" fence posts or 4" fence posts?
Al-W wrote
I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds They do tho. Lots of force on them depending on the detail of how much wind can get thru the fence itself. - but I could be wrong. Probably fine with such a short fence with it bolted to buildings at each end. Any insights or advice on this matter? |
3" fence posts or 4" fence posts?
In my fence it was the arris rails that broke due to wind loading first,
then the wood near the base where it rotted. Depends very much on the type of fence panels and how strong the actual structure is. Brian -- ----- - This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please! "Al-W" wrote in message ... Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W |
3" fence posts or 4" fence posts?
Brian Gaff wrote
Its not the posts that I find are the first casualties its the panels themselves. Depends on how the fence is done. Also whether metal concreted or wood directly concreted, after time the post shrinks and swells and water gets down into the bottom of the post hole in the concrete, it cannot get away, rusts the sockets and rots the wood and the break occurs at ground level usually. He's talking about posts in metal and is asking about the size of the posts. make damned sure the wood is well protected al the way down and if possible impregnated as cheapo posts tent to break. Can you run to concrete posts? "Tim+" wrote in message ... Al-W wrote: On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. Al-W 3" definitely not enough! 4" minimum unless you enjoy replacing broken posts. ;-) Tim -- Please don't feed the trolls |
3" fence posts or 4" fence posts?
On Mon, 5 Jun 2017 10:52:01 -0700 (PDT), Al-W
wrote: On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. Al-W I have a 6ft high close boarded fence with 6" square posts bolted to concrete studs down one side of the garden. A couple of months back the strong winds actually snapped one fence post AND it's concrete stud at ground level. It was a pig of a job to dig it all out! |
3" fence posts or 4" fence posts?
On 6/6/2017 8:44 AM, Brian Gaff wrote:
In my fence it was the arris rails that broke due to wind loading first, then the wood near the base where it rotted. Depends very much on the type of fence panels and how strong the actual structure is. Brian And just what you mean by "strong winds"; which very much depends on where you live, and how exposed the area is. Between two buildings should give some protection, unless it leads to a tunnel concentration. ISTR there is geographical data in BS6399. Googling "wind loading" gives lots of hits. |
3" fence posts or 4" fence posts?
On Monday, June 5, 2017 at 7:33:05 PM UTC+1, Chris Green wrote:
Al-W wrote: On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds.. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. 'All timber'? Is it panelled, if so I'm not sure if 3" posts will be enopugh, even 4" might be marginal. -- Chris Green Chris, thanks for the input. I plan to use 6" x 1" vertical boards, nailed alternately, each side of the fence, in order to allow some wind through, and thus reduce wind resistance.· Al |
3" fence posts or 4" fence posts?
On Monday, June 5, 2017 at 7:39:10 PM UTC+1, The Natural Philosopher wrote:
On 05/06/17 18:35, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Use 4" concrete posts set in cement, with concrete gravel boards Then the things won't rot Thanks for the suggestion. Unfortunately, I need the fence to be temporarily removable without too much aggro. Hence my use of metal post holders. Otherwise, I would probably have used concrete posts. Al |
3" fence posts or 4" fence posts?
On Monday, June 5, 2017 at 8:23:31 PM UTC+1, The Other Mike wrote:
On Mon, 5 Jun 2017 10:52:01 -0700 (PDT), Al-W wrote: On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. Concrete posts, set in concrete (postfix/postcrete) and then clad in rough sawn wood if someone objects to the bare concrete look. That sounds like a great idea. Unfortunately, I need the posts to be removable easily. Al |
3" fence posts or 4" fence posts?
On Tuesday, June 6, 2017 at 10:04:49 AM UTC+1, Davidm wrote:
On Mon, 5 Jun 2017 10:52:01 -0700 (PDT), Al-W wrote: On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. Al-W I have a 6ft high close boarded fence with 6" square posts bolted to concrete studs down one side of the garden. A couple of months back the strong winds actually snapped one fence post AND it's concrete stud at ground level. It was a pig of a job to dig it all out! Wow - that's relevant information; thanks! I think I will have to choose my 4" wooden posts carefully then. Also, I plan on making for less wind-resistance by staggering the vertical boards alternately on each side of the horizontal pieces - allowing some wind to pass through. Al |
3" fence posts or 4" fence posts?
On Tuesday, June 6, 2017 at 10:35:45 AM UTC+1, newshound wrote:
On 6/6/2017 8:44 AM, Brian Gaff wrote: And just what you mean by "strong winds"; which very much depends on where you live, and how exposed the area is. Between two buildings should give some protection, unless it leads to a tunnel concentration. Yes, there are buildings and a high wall on three sides but not to the south or southeast. Gales are not uncommon here in winter on the south coast, but of course a hurricane (though not yet experienced) is not impossible. Thanks for the suggestions. Al |
3" fence posts or 4" fence posts?
On 06/06/2017 12:20, Al-W wrote:
On Monday, June 5, 2017 at 8:23:31 PM UTC+1, The Other Mike wrote: On Mon, 5 Jun 2017 10:52:01 -0700 (PDT), Al-W wrote: On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. Concrete posts, set in concrete (postfix/postcrete) and then clad in rough sawn wood if someone objects to the bare concrete look. That sounds like a great idea. Unfortunately, I need the posts to be removable easily. ITYM "removable easily except by the wind" :) Do you need to be able to remove the posts down to ground level or would you be able to get away with concrete spurs to which you bolt the posts? (They can be sunk lower than usual at the risk of earlier rot of the posts.) http://www.supremeconcrete.co.uk/general/repair-spur/ IMLE "concrete in" metal posts holders are a bit weedy for 2m panels but there may be stronger ones out there. http://www.screwfix.com/p/concrete-i...m-2-pack/70197 -- Robin reply-to address is (intended to be) valid |
3" fence posts or 4" fence posts?
On 06/06/2017 12:15, Al-W wrote:
Chris, thanks for the input. I plan to use 6" x 1" vertical boards, nailed alternately, each side of the fence, in order to allow some wind through, and thus reduce wind resistance.· I'd be interested if anyone knows of evidence of how much (or little) that reduces wind resistance. I've seen "up to 15%" quoted but (a) "up to" makes me wonder if that is in ideal wind speed and direction and (b) it surprised me given the wind load even for chain link fencing can be 25 to 50% of the wind load of a solid fence. -- Robin reply-to address is (intended to be) valid |
3" fence posts or 4" fence posts?
On Tuesday, June 6, 2017 at 12:50:57 PM UTC+1, Robin wrote:
On 06/06/2017 12:20, Al-W wrote: On Monday, June 5, 2017 at 8:23:31 PM UTC+1, The Other Mike wrote: On Mon, 5 Jun 2017 10:52:01 -0700 (PDT), Al-W wrote: On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. Concrete posts, set in concrete (postfix/postcrete) and then clad in rough sawn wood if someone objects to the bare concrete look. That sounds like a great idea. Unfortunately, I need the posts to be removable easily. ITYM "removable easily except by the wind" :) Do you need to be able to remove the posts down to ground level or would you be able to get away with concrete spurs to which you bolt the posts? (They can be sunk lower than usual at the risk of earlier rot of the posts.) http://www.supremeconcrete.co.uk/general/repair-spur/ IMLE "concrete in" metal posts holders are a bit weedy for 2m panels but there may be stronger ones out there. http://www.screwfix.com/p/concrete-i...m-2-pack/70197 -- Robin reply-to address is (intended to be) valid Thanks very much for that suggestion. Unfortunately, I need the posts to be removeable to possibly allow a vehicle through, which has to drive though at a 45 degree angle, so unless those spurs were about 10ft apart, those concrete spurs are not really an option, unfortunately. Yes, I am a little concerned that the metal post holders will be the weak point in the fence, but I don't know of any other option that'll allow a vehicle to drive through when the posts are removed. Unless anyone herehas another suggestion. Al |
3" fence posts or 4" fence posts?
On Tuesday, June 6, 2017 at 1:45:12 PM UTC+1, Robin wrote:
On 06/06/2017 12:15, Al-W wrote: Chris, thanks for the input. I plan to use 6" x 1" vertical boards, nailed alternately, each side of the fence, in order to allow some wind through, and thus reduce wind resistance.· I'd be interested if anyone knows of evidence of how much (or little) that reduces wind resistance. I've seen "up to 15%" quoted but (a) "up to" makes me wonder if that is in ideal wind speed and direction and (b) it surprised me given the wind load even for chain link fencing can be 25 to 50% of the wind load of a solid fence. -- Robin reply-to address is (intended to be) valid Hmmm... That's a little worrying. Al |
3" fence posts or 4" fence posts?
"Al-W" wrote in message ... On Tuesday, June 6, 2017 at 12:50:57 PM UTC+1, Robin wrote: On 06/06/2017 12:20, Al-W wrote: On Monday, June 5, 2017 at 8:23:31 PM UTC+1, The Other Mike wrote: On Mon, 5 Jun 2017 10:52:01 -0700 (PDT), Al-W wrote: On Monday, June 5, 2017 at 6:35:59 PM UTC+1, Al-W wrote: Hi, oh learned ones! I need to construct a fence that will be subject to some strong winds. It is only 5.7 meters long and will have 5 posts, two of which will be bolted to buildings. The three intermediate posts will be held by galvanized fence post holders (concreted in). My big question is: Is there any point in stretching to 4" posts and hardware, or will the 3" versions be perfectly adequate? I find it hard to imagine a 3" fence post snapping in even the strongest winds - but I could be wrong. Any insights or advice on this matter? Many thanks Al-W PS.. I forgot to mention that the fence will be 2 meters tall and all timber. Concrete posts, set in concrete (postfix/postcrete) and then clad in rough sawn wood if someone objects to the bare concrete look. That sounds like a great idea. Unfortunately, I need the posts to be removable easily. ITYM "removable easily except by the wind" :) Do you need to be able to remove the posts down to ground level or would you be able to get away with concrete spurs to which you bolt the posts? (They can be sunk lower than usual at the risk of earlier rot of the posts.) http://www.supremeconcrete.co.uk/general/repair-spur/ IMLE "concrete in" metal posts holders are a bit weedy for 2m panels but there may be stronger ones out there. http://www.screwfix.com/p/concrete-i...m-2-pack/70197 -- Robin reply-to address is (intended to be) valid Thanks very much for that suggestion. Unfortunately, I need the posts to be removeable to possibly allow a vehicle through, which has to drive though at a 45 degree angle, so unless those spurs were about 10ft apart, those concrete spurs are not really an option, unfortunately. Yes, I am a little concerned that the metal post holders will be the weak point in the fence, but I don't know of any other option that'll allow a vehicle to drive through when the posts are removed. Unless anyone herehas another suggestion. My neighbour has a metal fence with metal verticals, that opens like a big metal covered gate when he wants to get a car into the yard. Works fine. |
3" fence posts or 4" fence posts?
On 07/06/2017 18:25, Al-W wrote:
Thanks very much for that suggestion. Unfortunately, I need the posts to be removeable to possibly allow a vehicle through, which has to drive though at a 45 degree angle, so unless those spurs were about 10ft apart, those concrete spurs are not really an option, unfortunately. Yes, I am a little concerned that the metal post holders will be the weak point in the fence, but I don't know of any other option that'll allow a vehicle to drive through when the posts are removed. Unless anyone herehas another suggestion. Al Maybe a really dumb suggestion but have you thought of a standard farmyard style 5 bar farm gate? One very robust post to hang it from and a smaller one at the securing end. You could still clad it with vertical boards if you want to make it less see through. -- Chris B (News) |
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