Masonry Fixings
 

In article ,
-GB-Carpy wrote:
Yes there are excellent & fast fixings. I use them all the time for Sky
dishes, but I don't think I could sleep at night if I'd used them to
affix a large plasma screen.

They might be fine if you can guarantee being in the middle of a suitable
type of brick - but for a plasma going onto a plastered wall I'd stick
with Rawlbolts. Even if you hit the mortar course those will still work
just fine.

--
*I went to school to become a wit, only got halfway through.

Dave Plowman London SW
To e-mail, change noise into sound.

Masonry Fixings
 

"Dave Plowman (News)" wrote in message
...
In article ,
-GB-Carpy wrote:
Yes there are excellent & fast fixings. I use them all the time for Sky
dishes, but I don't think I could sleep at night if I'd used them to
affix a large plasma screen.

They might be fine if you can guarantee being in the middle of a suitable
type of brick - but for a plasma going onto a plastered wall I'd stick
with Rawlbolts. Even if you hit the mortar course those will still work
just fine.

--
*I went to school to become a wit, only got halfway through.

Dave Plowman London SW


To e-mail, change noise into sound.

Oh Ye of little faith. I do not theorise about these bolts. I have used them
in the past in small sizes and they are still in use after years of
exposure. I just did not know they were available in sizes suitable for a
plasma etc. Having once used them I will never go back to Rawl-bolts. I have
a Rawl-bolts fail when supporting a washing line. Careful examination of the
failure showed that hole was very near the edge of the brick and the
tightening expansion had broken through into the mortar.
This kind of failure does not happen with Thunderbolts as there are no
expansion stresses.
In any event what is so difficult or dangerous in supporting a plasma
screen?
Mine weighs in at 38KG. Just a pair of these bolts would provide enough
holding power. However as they were so easy to fit I used my full stock of 8
of them.

If I had wanted to mount the plasma on an articulated bracket which allows a
screen to be extended some distance from the wall I would have hung from the
bracket myself before trusting it with my plasma. I would do this what ever
mounting fixtures I used.

Richard H

Masonry Fixings
 

In article ,
Hawkins wrote:
Oh Ye of little faith. I do not theorise about these bolts. I have used
them in the past in small sizes and they are still in use after years
of exposure. I just did not know they were available in sizes suitable
for a plasma etc. Having once used them I will never go back to
Rawl-bolts. I have a Rawl-bolts fail when supporting a washing line.
Careful examination of the failure showed that hole was very near the
edge of the brick and the tightening expansion had broken through into
the mortar.

Then you shouldn't have drilled the hole so close. But in the mortar
course will work with a suitable sized Rawlbolt - it will grip between the
bricks.

This kind of failure does not happen with Thunderbolts as
there are no expansion stresses.

********. If the hole is close to soft mortar it will break too. Cutting a
thread into anything introduces stresses.

In any event what is so difficult or dangerous in supporting a plasma
screen? Mine weighs in at 38KG. Just a pair of these bolts would provide
enough holding power. However as they were so easy to fit I used my
full stock of 8 of them.

It's not just the weight but how the stresses are applied to the fixing.
Which on a wall are much higher than the weight of what's being supported.

--
*When did my wild oats turn to prunes and all bran?

Dave Plowman London SW
To e-mail, change noise into sound.

Masonry Fixings
 

In article , Brian Gaff
scribeth thus
Or wall brackets for a mast of appreciable length either.

What metal are they, Stainless I suppose?

Of course the expanding type bolt sleeve thingies, can crack brickwork if
you are unlucky, so maybe ther is no perfect way.

Don't do what someone I knew did once;!!

Wanted a BIG FM aerial one of those Ron Smith jobbies Galaxy 456 or
something that weighed half a ton!..

Put the brackets up with studding that went right through the gable end
cavity to some 1/4 inch thick spreader plates on the inside skin of
thermalite blocks in the loft..

Anyway tightened and tightened some more and a bit more and them bloody
big cracking noise as the entire inside skin split along the bottom and
then the wall Wally tightened it up further till most of the inside skin
hit the outer brickwork!..

He moved shortly after that. I often wondered if the surveyors or the
purchaser ever picked it up!...
--
Tony Sayer