I have been carefully and steadily taking a 15 year old structure down that came close to our 1930's Metro style semi. The original kitchen house exterior corner wall will in time be removed being replaced with a 143mm steel column, rather than having heavier RSJs and the house "hanging" on the corner. This is for a bigger newer extension.

 

Our SE has specified a new cast pad to support the column steel.

 

What would people from here look at beginning this element of demo-underpinning?

 

Your thoughts experience welcome 

 

 

Edited September 29, 20215 yr by ianfish
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39 minutes ago, ianfish said:

beginning this element of demo-underpinning?

I don't really understand the question.

Do you mean removing the brick corner and replacing with a steel column?

 

Underpinning is horrible and expensive. Much easier to dig a hole from above.

Just now, saveasteading said:

I don't really understand the question.

Do you mean removing the brick corner and replacing with a steel column?

 

Underpinning is horrible and expensive. Much easier to dig a hole from above.

 

Its the sequence i'm after how would people tackle it.

 

Yes the original corner is being removed in the final finish and a steel column with RSJ into the walls will be fitted, that bit I get. Its the need for the concrete pad and how to sequence its construction im after ideas for.

Prop the wall up on both sides. There are special fittings to go into the mortar beds/

Remove brick corner , dig hole and fill with concrete. Fix column, bed wall onto column.

Remove props gently while holding breath.

Move on to next area.

 

Standard work for skilled builder. Scary for novice, and rightly so.

 

What is above? another floor or a roof.

10 minutes ago, saveasteading said:

Prop the wall up on both sides. There are special fittings to go into the mortar beds/

Remove brick corner , dig hole and fill with concrete. Fix column, bed wall onto column.

Remove props gently while holding breath.

Move on to next area.

 

Standard work for skilled builder. Scary for novice, and rightly so.

 

What is above? another floor or a roof.

1st floor..

Edited September 29, 20215 yr by ianfish
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Whilst I am all in favour of DIY work, I am not sure knocking out and propping up the corner of the house on a post is a DIY job.

it doesnt look that bad, acro the lintle in the door and a couple strongboy on the flank wall.

 

I'd question why the steel in the first place and leave the corner as is, what is it going to be carrying ?

Pad foundation under a corner with a door opening to one side. 

I would want to have my method checked before commencing.

How big does the structural engineer say the pad has to be?

1 hour ago, Dave Jones said:

 

I'd question why the steel in the first place and leave the corner as is, what is it going to be carrying ?

We dont want a large or anything too square in what will be the middle of our new kitchen.

 

I also didnt want to just have horizionfal rsj supports leaving the corner of the house just balanced.

 

The column is part of the SE spec which is what id envisaged

 

 

58 minutes ago, Marvin said:

Pad foundation under a corner with a door opening to one side. 

I would want to have my method checked before commencing.

How big does the structural engineer say the pad has to be?

SE suggests a minimum of 1400 x 1400 by 500mm deep

Well, you could make a feature of the wall/pillar and put the new RSJ on the outside to save the cost/expense/hassle. It wouldn't make the pillar that much bigger and would save you a packet.

 

take some ideas https://www.houzz.co.uk/magazine/how-to-work-around-a-structural-pillar-in-your-kitchen-extension-stsetivw-vs~76437319

 

3 hours ago, ProDave said:

I am not sure knocking out and propping up the corner of the house on a post is a DIY job.

If you have not done this sort of thing before, then this is not the one to start with.

At least get an experienced builder to do the propping and column work,  and you can assist.

There is the window, too, and so there isn't much wall there anyway.

 

Perfectly doable but you don't know how much  you don't know....yet.

 

Think of the worst that could happen. Now ask your house insurer if you would be covered. 

1 hour ago, saveasteading said:

If you have not done this sort of thing before, then this is not the one to start with.

At least get an experienced builder to do the propping and column work,  and you can assist.

There is the window, too, and so there isn't much wall there anyway.

 

Perfectly doable but you don't know how much  you don't know....yet.

 

Think of the worst that could happen. Now ask your house insurer if you would be covered. 

+1

Before you do anything, tidy up the site!

Just now, Mr Punter said:

Before you do anything, tidy up the site!

Just now, Mr Punter said:

Before you do anything, tidy up the site!

You know I had not thought to do that........

1 minute ago, ianfish said:

You know I had not thought to do that........

 

Is the rest of the lean-to coming down?

Just now, Mr Punter said:

 

Is the rest of the lean-to coming down?

 

No - that remains

Two trips to the NEC in the next few days..

 

UK Construction week tomorrow then back for Grand Designs

 

 

steels in...passed off by BC too