- Thread starter Joe 90
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Gareth J
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Also a fan. The time saved is immense. Bit like Tek screws.
But they do have limitations. As mentioned, soft substrate (a bigger, longer one can help)
But they're also susceptible to fail if used somewhere impacts/vibration occur. Similar to Rawl bolts but worse. If they fail in this situation, it generally means I didn't use enough to spread the impact loading.
A door frame could be a classic example, not enough used to spread the impact loads from door slams and they can work loose. Not uncommon on pvc doors where you can't really torque them down either.
But they do have limitations. As mentioned, soft substrate (a bigger, longer one can help)
But they're also susceptible to fail if used somewhere impacts/vibration occur. Similar to Rawl bolts but worse. If they fail in this situation, it generally means I didn't use enough to spread the impact loading.
A door frame could be a classic example, not enough used to spread the impact loads from door slams and they can work loose. Not uncommon on pvc doors where you can't really torque them down either.
Seadog
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Exuptoy
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slim_boy_fat
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Sweet. I'm even managing to get the blame lain elsewhere now too.
I wondered how I was dragged into it.
James1979
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My fat thumbs is how! Sorry, @slim_boy_fat - blame squarely back at @MattF ’s door!!I wondered how I was dragged into it.
MattF
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I had to look up what they were referring to too.
Pete.
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They don't fail if they are fitted properly. I was using M12 thunderbolts to support vertical 6-ton pre-cast concrete panels for demolition - 5 floors up on the edge of the building. Didn't have a single one come loose even re-used ones.
As said previously in the thread - use a new drill of the proper size, and a proper drilling machine not some light-hitting high speed job that's going to churn the dust about in the hole and make it oversize. You want to drill the hole quickly. Get the dust out of the hole and use good quality bolts. Fit them with an impact gun.
Gareth J
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They can fail and the way they do in my experience is by being bashed repeatedly. For example on a heavy door or gate latch that gets slammed. But this is a failing of load spreading design as much as anything. More bolts needed in such situations than simple static tension/shear loads.
No complaints though, use 100s of them
I love them, I've got gate posts around our farm and a dozen other farms with 12 ft gates hanging off them held with 4 m12x150 thunders and have never let lose.
But! They have to be te JCP anker bolts everything else is sub imo,
I use dozens of the m12x 60 for gates and railings and have 100% faith in them.
And just like others have said hole size is critical and their not too good in soft old sandstone.
I like having the ability to take them out as fast as they go in, not like the faf with expanding fixtures or chemical anchors...thou chemical anchors are King for sandstone I think
But! They have to be te JCP anker bolts everything else is sub imo,
I use dozens of the m12x 60 for gates and railings and have 100% faith in them.
And just like others have said hole size is critical and their not too good in soft old sandstone.
I like having the ability to take them out as fast as they go in, not like the faf with expanding fixtures or chemical anchors...thou chemical anchors are King for sandstone I think
