You can tell it's a new year because of the number of questions I'm
asking... (all those jobs I put off last year).

I'm going to be replacing some joists this weekend and I'm just working
out exactly what I need to do.

Because I'm forced to work from below the existing floor (long story)
I'm not able to use the build in/hammer in joist hangers and have
instead sourced some bolt-on hangers.

I intend to place the new joist into the hole left by the old one on
one wall and then use the bolt-on joist hanger on the other wall.

My question is, are Resin Anchor Systems any good and would they be
suitable for this job? I'm looking at using M12 anchors but I'm
concerned that resin bolts wouldn't be as suitable as standard
expanding anchors. The only reason I'm trying to avoid using standard
anchors is that one of the joist hangers will be very close to the back
wall and access will be a bit of a bugger.

The products I'm looking at are these:
http://www.toolstation.com/index.html?code=14071
Any thoughts?

Thanks once again

Seri

On 11 Jan 2005 05:37:31 -0800, Seri wrote:

You can tell it's a new year because of the number of questions I'm
asking... (all those jobs I put off last year).

I'm going to be replacing some joists this weekend and I'm just working
out exactly what I need to do.

Because I'm forced to work from below the existing floor (long story)
I'm not able to use the build in/hammer in joist hangers and have
instead sourced some bolt-on hangers.

I intend to place the new joist into the hole left by the old one on
one wall and then use the bolt-on joist hanger on the other wall.

My question is, are Resin Anchor Systems any good and would they be
suitable for this job? I'm looking at using M12 anchors but I'm
concerned that resin bolts wouldn't be as suitable as standard
expanding anchors. The only reason I'm trying to avoid using standard
anchors is that one of the joist hangers will be very close to the back
wall and access will be a bit of a bugger.

The products I'm looking at are these:
http://www.toolstation.com/index.html?code=14071
Any thoughts?

Thanks once again

Seri

The resin capsules are a great way of fixing. Place the capsule in the
hole you drilled, and hammer in the threaded rod right in to break it. You
only have to leave it for a little while to set, so not waiting around for
days. We use them all the time without problems.

BigWallop wrote:

The resin capsules are a great way of fixing. Place the capsule in the
hole you drilled, and hammer in the threaded rod right in to break it. You
only have to leave it for a little while to set, so not waiting around for
days. We use them all the time without problems.

Not only that, when used for a bolt on hanger, pretty much all the load
is a shear force on the bolts, there will be very little "pull" on them
anyway (it would probably stay put even if you forgot to put the nuts on!)

--
Cheers,

John.

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BigWallop wrote:
The resin capsules are a great way of fixing. Place the capsule in
the
hole you drilled, and hammer in the threaded rod right in to break
it. You
only have to leave it for a little while to set, so not waiting
around for
days. We use them all the time without problems.

This is good news to me.

They've been specified (by the structural engineer) for a slapping I'm
doing. There's a steel standard (PFC) to go up one edge of the slap
which has to be fixed to the end of the wall. It's a single brick wall
so I guess that's why resin is used, expansion fittings might be a bad
idea.

It would be good to have the PFC in place then drill and place the
fastenings. Is this possible, what's the relationship between the
diameter of the resin capsule/hole in the masonry and the diameter of
the stud/hole in the PFC? The fixings are specified as 1M8.

Extra credit question. Some fixings are 1Mx (e.g 1M8 resin anchor) and
some are 2Mx (e.g. 2M12 and 2M16 rawlbolts). What's the significance of
the numerical prefix?