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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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DIY Concrete screws
In my local supplier, they have concrete screws...
http://deckrepairhq.com/wp-content/u...ws-150x130.jpg At three quid a pop. No wucking fay, am I paying that for a fecking bolt, especially if I want 12 or more. I recall a couple of years ago, the same supplier didn't have concrete bolts, but had these... http://www.china-tiantian.com/upload...9211551460.jpg And I'd used a couple of them to see if they bolted into concrete well enough. They did, so I repeated the experiment today and drove one of the 3quid screws into its 12mm hole (quite easy) and drove one of the coach screws into its 10mm hole (a lot tougher) and it held ok. A pneumatic impact hammer was needed for both, though. The difference in price? The coach screws are less than a quid each. |
#2
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DIY Concrete screws
On May 27, 6:34*pm, Grimly Curmudgeon wrote:
In my local supplier, they have concrete screws...http://deckrepairhq.com/wp-content/u...rete-Screws-15... At three quid a pop. No wucking fay, am I paying that for a fecking bolt, especially if I want 12 or more. I recall a couple of years ago, the same supplier didn't have concrete bolts, but had these...http://www.china-tiantian.com/upload...9211551460.jpg And I'd used a couple of them to see if they bolted into concrete well enough. They did, so I repeated the experiment today and drove one of the 3quid screws into its 12mm hole (quite easy) and drove one of the coach screws into its 10mm hole (a lot tougher) and it held ok. A pneumatic impact hammer was needed for both, though. The difference in price? The coach screws are less than a quid each. mmm try fixing something worth fixing to the concrete with both types and share the results? I;d expect the proper (massively overpriced) concrete screws to cut a better sharper thread in the concrete and so grip better than a forced in coach bolt - that, I;d expect, got worn out & mangled during the "pneumatic impact hammering" stage... Jim K |
#3
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DIY Concrete screws
On Mon, 27 May 2013 11:20:33 -0700 (PDT), Jim K
wrote: mmm try fixing something worth fixing to the concrete with both types and share the results? I;d expect the proper (massively overpriced) concrete screws to cut a better sharper thread in the concrete and so grip better than a forced in coach bolt - that, I;d expect, got worn out & mangled during the "pneumatic impact hammering" stage... Possibly, but the function of the bigger bolts is to take some of the shear load on their shoulders (it's a wall plate with a dozen joist hangers). Each larger bolt is neighboured by two smaller ones, which are cheap as chips and a piece of **** to drive in. So, there's no shortage of load-sharing and plenty of strength in the assembly as a whole. I just object to paying through the nose to a supplier who thinks they can charge what they like for stuff like this. |
#4
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DIY Concrete screws
Grimly Curmudgeon wrote:
In my local supplier, they have concrete screws... http://deckrepairhq.com/wp-content/u...ws-150x130.jpg At three quid a pop. No wucking fay, am I paying that for a fecking bolt, especially if I want 12 or more. I recall a couple of years ago, the same supplier didn't have concrete bolts, but had these... http://www.china-tiantian.com/upload...9211551460.jpg And I'd used a couple of them to see if they bolted into concrete well enough. They did, so I repeated the experiment today and drove one of the 3quid screws into its 12mm hole (quite easy) and drove one of the coach screws into its 10mm hole (a lot tougher) and it held ok. A pneumatic impact hammer was needed for both, though. The difference in price? The coach screws are less than a quid each. I've been using these for years: http://www.ukfixings.net/7.5mm-x-100...ox-of-100.html About 8p each. You can get thicker ones, but I've used the 7.5mm ones for wallplates on numerous occasions |
#5
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DIY Concrete screws
On 27/05/2013 18:34, Grimly Curmudgeon wrote:
In my local supplier, they have concrete screws... http://deckrepairhq.com/wp-content/u...ws-150x130.jpg At three quid a pop. No wucking fay, am I paying that for a fecking bolt, especially if I want 12 or more. I recall a couple of years ago, the same supplier didn't have concrete bolts, but had these... http://www.china-tiantian.com/upload...9211551460.jpg And I'd used a couple of them to see if they bolted into concrete well enough. They did, so I repeated the experiment today and drove one of the 3quid screws into its 12mm hole (quite easy) and drove one of the coach screws into its 10mm hole (a lot tougher) and it held ok. A pneumatic impact hammer was needed for both, though. The difference in price? The coach screws are less than a quid each. Big range of Thunderbolts at Toolsatan. http://www.toolstation.com/shop/Scre...ors/d90/sd2040 I use these all the time for decking wall plates & awnings. Brilliant. -- Dave - The Medway Handyman www.medwayhandyman.co.uk |
#6
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DIY Concrete screws
On 27/05/2013 19:20, Jim K wrote:
On May 27, 6:34 pm, Grimly Curmudgeon wrote: In my local supplier, they have concrete screws...http://deckrepairhq.com/wp-content/u...rete-Screws-15... At three quid a pop. No wucking fay, am I paying that for a fecking bolt, especially if I want 12 or more. I recall a couple of years ago, the same supplier didn't have concrete bolts, but had these...http://www.china-tiantian.com/upload...9211551460.jpg And I'd used a couple of them to see if they bolted into concrete well enough. They did, so I repeated the experiment today and drove one of the 3quid screws into its 12mm hole (quite easy) and drove one of the coach screws into its 10mm hole (a lot tougher) and it held ok. A pneumatic impact hammer was needed for both, though. The difference in price? The coach screws are less than a quid each. mmm try fixing something worth fixing to the concrete with both types and share the results? I;d expect the proper (massively overpriced) concrete screws to cut a better sharper thread in the concrete and so grip better than a forced in coach bolt - that, I;d expect, got worn out & mangled during the "pneumatic impact hammering" stage... The concrete screw also has an integral anti-vibration head and is probably made from a stronger steel. Colin Bignell |
#7
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DIY Concrete screws
"Grimly Curmudgeon" wrote in message
... On Mon, 27 May 2013 11:20:33 -0700 (PDT), Jim K wrote: mmm try fixing something worth fixing to the concrete with both types and share the results? I;d expect the proper (massively overpriced) concrete screws to cut a better sharper thread in the concrete and so grip better than a forced in coach bolt - that, I;d expect, got worn out & mangled during the "pneumatic impact hammering" stage... Possibly, but the function of the bigger bolts is to take some of the shear load on their shoulders (it's a wall plate with a dozen joist hangers). Each larger bolt is neighboured by two smaller ones, which are cheap as chips and a piece of **** to drive in. So, there's no shortage of load-sharing and plenty of strength in the assembly as a whole. I just object to paying through the nose to a supplier who thinks they can charge what they like for stuff like this. I've taken to using chemical anchor gunge with normal 10mm studding with nuts & washers. (though admittedly I did buy a box of 25 12mm x 160mm Multi-monti from Screwfix the other day) AWEM |
#8
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DIY Concrete screws
On Mon, 27 May 2013 20:19:12 +0100, "Phil L"
wrote: I've been using these for years: http://www.ukfixings.net/7.5mm-x-100...ox-of-100.html About 8p each. You can get thicker ones, but I've used the 7.5mm ones for wallplates on numerous occasions That's what I'm using for the neighbouring smaller screws - 7.5x150mm There's an average of one of those per foot, with the larger screws one every two feet. |
#9
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DIY Concrete screws
On Mon, 27 May 2013 21:13:04 +0100, The Medway Handyman
wrote: Big range of Thunderbolts at Toolsatan. http://www.toolstation.com/shop/Scre...ors/d90/sd2040 I use these all the time for decking wall plates & awnings. Brilliant. Hellfire; the M12x100mm would do me - I've been going longer, aiming for 100mm in the concrete, just to be sure of it, but likely 50mm penetration would do the job. When I see prices like that, I just get more annoyed at the local arsehole rippers. |
#10
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DIY Concrete screws
Grimly Curmudgeon wrote:
When I see prices like that, I just get more annoyed at the local arsehole rippers. I presume there is no toolsatan.ie? I think these are the manufacturer of their "own label" fixings http://www.forgefix.co.uk/Contact_Us Worth seeing who they sell through over there? |
#11
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DIY Concrete screws
On Monday, May 27, 2013 6:34:53 PM UTC+1, Grimly Curmudgeon wrote:
In my local supplier, they have concrete screws... I once idly wondered if it might be possible to make screws from glass fibre & cement. Its just about possible to use wood in some cases. NT |
#12
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DIY Concrete screws
On Mon, 27 May 2013 23:00:11 +0100, Andy Burns
wrote: I presume there is no toolsatan.ie? Unfortunately, not. I can get them to drop stuff to a virtual address in Antrim which then forwards to me for a very modest fee, but it's a faff and really only worthwhile for a reasonable value item. I think these are the manufacturer of their "own label" fixings http://www.forgefix.co.uk/Contact_Us Worth seeing who they sell through over there? Interesting, ta. |
#13
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DIY Concrete screws
Exactly 8p - plus delivery & VAT on top...,
I was a bit ****ed off to find toolsatan had upped the price by 100% of their small packs of concrete screws a couple of wks ago. The pack size went from 25 to 10 & the price went up a bit! Jim K |
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