Hi all.
I have half a plan to open up a wall between the lounge and dining room
to install french doors or similair.
Some of you may remember how I once descibed my ground level floating
floors being supported on 3" deep joists with a sleeper wall.
So what precautions should I use to avoid buggering up the floors if I
use props to support the wall before I install a lintel?

I'm not sure if the wall is single or double brick.
The wall is shown here as a - b www.tally-mo.com

Thanks.

Arthur

51 wrote:
Hi all.
I have half a plan to open up a wall between the lounge and dining
room to install french doors or similair.
Some of you may remember how I once descibed my ground level floating
floors being supported on 3" deep joists with a sleeper wall.
So what precautions should I use to avoid buggering up the floors if I
use props to support the wall before I install a lintel?

I'm not sure if the wall is single or double brick.
The wall is shown here as a - b www.tally-mo.com

Thanks.

Arthur

You don't know if it's single or double brick? - have you not tried using a
tape measure? - about 5 inch is a single wall and about 10 inch is a double
wall.

Either way, this wall is a supporting wall, it looks like it's carrying the
wall seperating bedrooms and also carrying floor joists upstairs so it will
need substantial support...a few questions...
1) what width opening are you aiming for?
2) how high will the opening be? - are yoiu going all the way up to the
ceiling or is it to be similar to a wide door opening?
3) who is doing the work?

"Phil L" wrote in message
k...
51 wrote:
Hi all.
I have half a plan to open up a wall between the lounge and dining
room to install french doors or similair.
Some of you may remember how I once descibed my ground level floating
floors being supported on 3" deep joists with a sleeper wall.
So what precautions should I use to avoid buggering up the floors if I
use props to support the wall before I install a lintel?

I'm not sure if the wall is single or double brick.
The wall is shown here as a - b www.tally-mo.com

Thanks.

Arthur

You don't know if it's single or double brick? - have you not tried using
a tape measure? - about 5 inch is a single wall and about 10 inch is a
double wall.

Either way, this wall is a supporting wall, it looks like it's carrying
the wall seperating bedrooms and also carrying floor joists upstairs so it
will need substantial support...a few questions...
1) what width opening are you aiming for?
2) how high will the opening be? - are yoiu going all the way up to the
ceiling or is it to be similar to a wide door opening?
3) who is doing the work?


The upper floor joists run parallel to this wall.
Opening for double french doors upto standard door height.
The upper half of this wall is single brick so safe to assume all of it is
single brick.
I did a wall opening by myself about ten years ago though this was about 4'
wide.
I didn't know about the 3" joists back then and the floor hasn't suffered as
far as I
can tell. But at that time the other side of that wall was a concrete
kitchen floor.

This time though, I will probably hire men to do it.

Arthur

51 wrote:
"Phil L" wrote in message
k...
51 wrote:
Hi all.
I have half a plan to open up a wall between the lounge and dining
room to install french doors or similair.
Some of you may remember how I once descibed my ground level
floating floors being supported on 3" deep joists with a sleeper
wall. So what precautions should I use to avoid buggering up the floors
if I use props to support the wall before I install a lintel?

I'm not sure if the wall is single or double brick.
The wall is shown here as a - b www.tally-mo.com

Thanks.

Arthur

You don't know if it's single or double brick? - have you not tried
using a tape measure? - about 5 inch is a single wall and about 10
inch is a double wall.

Either way, this wall is a supporting wall, it looks like it's
carrying the wall seperating bedrooms and also carrying floor joists
upstairs so it will need substantial support...a few questions...
1) what width opening are you aiming for?
2) how high will the opening be? - are yoiu going all the way up to
the ceiling or is it to be similar to a wide door opening?
3) who is doing the work?


The upper floor joists run parallel to this wall.
Opening for double french doors upto standard door height.
The upper half of this wall is single brick so safe to assume all of
it is single brick.
I did a wall opening by myself about ten years ago though this was
about 4' wide.
I didn't know about the 3" joists back then and the floor hasn't
suffered as far as I
can tell. But at that time the other side of that wall was a concrete
kitchen floor.

This time though, I will probably hire men to do it.

Arthur

The wall isn't built on the downstairs joists, it's built on concrete, if
you can get underneath your floorboards you will see that the wall continues
down to the foundations.
This will need a steel gidrer installing to hold up the wall above - a
pressed steel lintel is no good over this kind of span at 100mm
wide....floorboards will probably have to be lifted in order to use acrow
props because they need to stand on something solid, 3" joists are not
suitable

"Phil L" wrote in message
news
51 wrote:
"Phil L" wrote in message
k...
51 wrote:
Hi all.
I have half a plan to open up a wall between the lounge and dining
room to install french doors or similair.
Some of you may remember how I once descibed my ground level
floating floors being supported on 3" deep joists with a sleeper
wall. So what precautions should I use to avoid buggering up the floors
if I use props to support the wall before I install a lintel?

I'm not sure if the wall is single or double brick.
The wall is shown here as a - b www.tally-mo.com

Thanks.

Arthur

You don't know if it's single or double brick? - have you not tried
using a tape measure? - about 5 inch is a single wall and about 10
inch is a double wall.

Either way, this wall is a supporting wall, it looks like it's
carrying the wall seperating bedrooms and also carrying floor joists
upstairs so it will need substantial support...a few questions...
1) what width opening are you aiming for?
2) how high will the opening be? - are yoiu going all the way up to
the ceiling or is it to be similar to a wide door opening?
3) who is doing the work?


The upper floor joists run parallel to this wall.
Opening for double french doors upto standard door height.
The upper half of this wall is single brick so safe to assume all of
it is single brick.
I did a wall opening by myself about ten years ago though this was
about 4' wide.
I didn't know about the 3" joists back then and the floor hasn't
suffered as far as I
can tell. But at that time the other side of that wall was a concrete
kitchen floor.

This time though, I will probably hire men to do it.

Arthur

The wall isn't built on the downstairs joists, it's built on concrete,

I know that.

if you can get underneath your floorboards you will see that the wall
continues down to the foundations.
This will need a steel gidrer installing to hold up the wall above - a
pressed steel lintel is no good over this kind of span at 100mm
wide....floorboards will probably have to be lifted in order to use acrow
props because they need to stand on something solid, 3" joists are not
suitable


Have you used the type of props that are used from one side and replace the
need
from props on both sides?

I think these are type
http://www.hss.com/g/50049/Strongboy_Hirepack.html

Arthur

51 wrote:

Have you used the type of props that are used from one side and
replace the need
from props on both sides?

I think these are type
http://www.hss.com/g/50049/Strongboy_Hirepack.html

Arthur

Yes, you still need acrow props to hold them up...and HSS are expensive, I
pay about a fiver for a strongboy and a prop per week
You just chisel out a horizontal joint straight through the mortar bed and
these slot into it, over a 6ft span, one about 18in from each end will
suffice and one or two courses above the desired height...their main
drawback is that they are often in the way when coming to insert the
steelwork...also you'll need to order the steel because it sometimes can
take days...the order in which I would do this job is:
1) measure and order the steelwork, a 150 X 100mm will do it comfortably, at
whatever length you require.
2) once the steel is on site, hack off the plaster on both sides of the wall
and take up a few boards within a foot or two of the wall, spaced as
mentioned above
3) measure the height of acrows you will need, not forgetting the extra 2 -
3 ft for the 'cellar' and pick them up, with the strongboys and two extra
props (4 in total)
4) cut out the joints as req and insert the strongboys and props, making
sure the props are upright, use a spirit level if possible.
5) carefully remove the brickwork below each prop, not panicking when 3 or 4
bricks fall at once, try to keep the sides square and straight.
6) insert the girder to the height required and brick up on top of the
girder
7) next day, wedge in pieces of slate all along the brickwork horizontal
joints (IE above the bricks you've laid and the existing hanging brickwork)
8) insert one prop under eah end of the girder and tighten, to force any
loose brickwork etc back up, point up under each end of the girder, where it
will effectively be sitting.

Day after remove all props.