Chimney breast removed and joist floor needs to be added.

[moe]

Hi all.

 

I've been currently renovating my house.

 

Anyway, I have now removed the chimney breast walls from top to bottom to gain more room size from the attic, bedrooms to the living rooms and kitchen.

 

I am now left in the bedrooms with exposed joists, which are 7x3 timbers and 5 metres long span.

The joist runs in a trimmer fashion and then they are connected to the joists which are running wall to wall. However, one of joists running wall to wall is not directly in the wall. This can be seen on the pictures uploaded and drawn floor plan as this help for a better understanding.

 

However my question is, I want to cover up the gap, but what is the proper way of securing it up and structurally having it ''passed'' off. I haven't got the building inspector involved in this, but I want to do the job securely right and mostly for the sake of peace of mind.

 

I have drawn 3 plans up. 1 plan is the original floor plan and the 2 are the options are which to consider on what direction I need to go. I was kind of hoping to avoid the idea of using joist hangers as I am not really keen on them. Unless someone can correct me on them if they are any good.

 

I have an idea on how to cover up the joists, but I need everyone's input.

 

I hope this information is clear. If you need more pictures please let me know.

 

Thanks,

Mozzer.

[Gone West]

11 hours ago, moe said:

I haven't got the building inspector involved in this, but I want to do the job securely right and mostly for the sake of peace of mind.

I'm looking to do the same, but as a chimney breast is often structural, providing bracing to the wall, I will get a structural engineer to check it out first.

[George]

If the joist arrangement haven't changed due to the removal of the chimney, and you are happy with the bounce/feel of the floor, then you may as well just infill the hole.

[moe]

Hi George.

 

Thanks for the reply. 

 

The floor is completely solid. 

 

The question is what if I was to sister the joists and remove the trimmer completely. As seen on the pictures on option 1, floor plan. 

 

 

[bassanclan]

Way less disruptive to follow option 2,but use your design in option 1 for the stairs area

[moe]

Hi bassanclan,

 

Thanks. Will keep you updated. 

[George]

1 hour ago, moe said:

The question is what if I was to sister the joists and remove the trimmer completely. As seen on the pictures on option 1, floor plan. 

Yes my answer don't sister if not needed because it is a lot of extra material and work. 

Edited July 25, 2023 by George

[moe]

Hi George, 

 

Thanks for getting back to me.

Hope you are well. 

 

I understand what you are saying.

 

Could it be possible to remove the trimmer completely, whilst it's safely acro proped up to support the original 7*3 timbers.

Put a full size 7*3 (c24) timber sistered next to the original 7*3 timber. So intentionally it becomes a one sized joist. 

 

I know the  7*3 (c24) timber will be in oneside in the wall whilst the original 7*3 timber will be in the other side of wall.

I know, I won't be able to put a full size 7*3 (c24) timber in wall to wall because I will to start to hit a both parties wall.

And I know that not a good idea.....

( I have uploaded a 'option 1 floor layout plan' highlighted in red and blue, to show the new timber goes into the wall, whilst the original  timber goes into the other side of the wall.)

 

I'm sorry if I'm asking a  complicated question. 

 

I know this is over kill, but I want to know for the sake of peace and mind, will it be structurally safely and sound?

 

Thanks,

Moz.🧗💫

[bassanclan]

Option 1 is less desirable. Removing any part of the structure which is sound has higher risk and may have unintended consequences, especially as you appear to have limited knowledge.

 

If you follow as I said before it will provide equal stability without the risk