How to secure trimmer joist to wall
 

Hi all

I am installing joist for new stairwell in extension.

I am trying to find out how to secure the trimmer joist to the wall.

Do I have to tie into the brickwork, or is there a hanger that I can use.

I have a hanger for connecting the other end to the joist.

Any help much appreciated

Regards

Cheesy

Cheesy Moments wrote:

Hi all

I am installing joist for new stairwell in extension.

I am trying to find out how to secure the trimmer joist to the wall.

Do I have to tie into the brickwork, or is there a hanger that I can use.

You can. but I wouldn't. They stretch a little, and you may end up a
little out of true, or worse still, creaking.


With stairs utter rigidity is the way to go. Either chase into the brick
and mount on a concrete pad AND use a hangar to avoid it being pulled
out, or use a post from below tied to the floor, and screw that soundly
to the wall as well.


I have a hanger for connecting the other end to the joist.

Any help much appreciated

Regards

Cheesy

With stairs utter rigidity is the way to go. Either chase into the brick
and mount on a concrete pad AND use a hangar to avoid it being pulled
out, or use a post from below tied to the floor, and screw that soundly
to the wall as well.


I have a hanger for connecting the other end to the joist.



What sort of depth should I chase into? I was thinking about 100mm. I
thought that would give more stability abd rigidity.

Thanks

Chris

Cheesy Moments wrote:

I am installing joist for new stairwell in extension.

I am trying to find out how to secure the trimmer joist to the wall.

Do I have to tie into the brickwork, or is there a hanger that I can use.

A diagrma might help to be sure of exactly what you are trying to do,
but the short answer is that you can get heavy hangers designed to be
rawl bolted to the face of a masonry wall that will probably do what you
want.

Here is one I used for a stringer beam:-

http://www.internode.co.uk/temp/shoe.jpg



--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

A diagrma might help to be sure of exactly what you are trying to do
Cheers,

John.

New Extension Existing Building

|------|------|------------|----------------------------
Floor | | | |
Joists | | | |Old Gable Wall
| | | |
| | |------------|
| | |------------|
| | | Header |
| | | Joist |
| | | |
| | | |
| | | |
| | | |
| | | Stair |
| | | Well |
|------|------|------------|----------------------------

(Not to scale.......obviously ;-) )

Hope this makes sense. I've never tried this before.

Regards
Chris

Cheesy Moments wrote:

A diagrma might help to be sure of exactly what you are trying to do
Cheers,

John.


New Extension Existing Building

|------|------|------------|----------------------------
Floor | | | |
Joists | | | |Old Gable Wall
| | | |
| | |------------|
| | |------------|
| | | Header |
| | | Joist |
| | | |
| | | |
| | | |
| | | |
| | | Stair |
| | | Well |
|------|------|------------|----------------------------

(Not to scale.......obviously ;-) )

Hope this makes sense. I've never tried this before.

So the left hand end of the header joist could sit in a conventional
joist hanger nailed to the floor joist (or more likely a double joist I
would guess).

The right hand end would be held by a shoe like that I
described/pictured above. I expect there would also be a short floor
joist or two that hangs from your header joist, and help carry the floor
of the top landing area?

(Typically the stairs themselves are not usually counted as imposing
much load on a joist anyway. Half the load will be carried by the floor
below, and you don't tend to park heavy furniture permanently on stairs).

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/