An extension build

Buffman · 1 Jul 2022 at 20:07

The bolts will be fine, they will be over specced to have multiple methods of failure I.e. 6 bolts but only require 3.
It does look like you're missing a bolt on the right hand side.

Did you not consider putting the steel "up" into the joists so you don't have the steel bulkhead in sight? It's a bit more effort and would break into your rooms above, but visually a lot more appealing. (i shouldn't mention it, not much you can easily do now!)

200sols · 1 Jul 2022 at 20:10

It's odd, I can't fathom why they have done it that way myself. But thanks for the images, very interesting to see it all documented.

casper_uk · 1 Jul 2022 at 22:09

Great to see how it actually happens! Them bolts though... am sure it must be ok, but I pictured the main beam resting on the uprights as well.

Karl · 2 Jul 2022 at 09:53

Buffman said:
The bolts will be fine, they will be over specced to have multiple methods of failure I.e. 6 bolts but only require 3.
It does look like you're missing a bolt on the right hand side.

Did you not consider putting the steel "up" into the joists so you don't have the steel bulkhead in sight? It's a bit more effort and would break into your rooms above, but visually a lot more appealing. (i shouldn't mention it, not much you can easily do now!)

Did consider it during drawings, but it's up there now...

BennyC · 2 Jul 2022 at 18:07

Great thread, be keen to see how the approach removing the chimney breast. My O/H has an unsightly support for the stack in the bathroom that we'd like to get removed.

darael · 2 Jul 2022 at 18:51

I always thought they rested steels on the brickwork, rather than other steels to make a goalpost shape. I'm not sure how well I'd sleep at night, knowing that half of my house is resting on 12 bolts. :eek:

a1ex2001 · 2 Jul 2022 at 19:01

darael said:
I always thought they rested steels on the brickwork, rather than other steels to make a goalpost shape. I'm not sure how well I'd sleep at night, knowing that half of my house is resting on 12 bolts.

Don’t ever go in a commercial steel frame building then as your life will often be hanging by a few bolts in some steel!

I assume the vertical steels are to allow for smaller support pillars as the block work needed under them would be substantial given the load.

Raising the steels into the floor joists above would have been nice but it is a considerable extra work load, builders hate it!

Karl · 8 Jul 2022 at 18:27

Week 4:

The whole building collapsed because the bolts failed.

Only joking.

Floor joists have gone in, and the perimeter of block work began.

Wife for scale.

The steel lintel going above the bi-folds was meant to go in today, but unfortunately it hasn't been manufactured in time, so that'll be done next week now, along with the gables and roof construction.

Oh, also, the building inspector came and signed this stage off, so will next attend when we've go the roof on!

{SAS}TB · 8 Jul 2022 at 19:10

Coming on nicely ! :d

jonneymendoza · 8 Jul 2022 at 20:25

Looks good.

Are you doing it yourself with some friends or got pro builders in?

Karl · 8 Jul 2022 at 20:28

I chose the bolts myself.

(We got pros in

)

tamzzy · 8 Jul 2022 at 21:08

darael said:
I'm not sure how well I'd sleep at night, knowing that half of my house is resting on 12 bolts.

totally this lol, even if the bolts were overspecced :cry:

1mm3 · 10 Jul 2022 at 23:04

Bifolds look small compared to your plans?

koolpc · 10 Jul 2022 at 23:44

1mm3 said:
Bifolds look small compared to your plans?

Def not like the plan

Karl · 11 Jul 2022 at 06:45

No you’re right they are smaller. The updated drawings have a lot more detail and text all over them, so probably easier to look at the ones I’ve posted as an idea of what we are trying to achieve. The model is largely the same but you’re right the opening is a bit smaller.
For what it’s worth, the opening is 3.6m for a 3.5m door that i mentioned earlier in this thread.

Buffman · 11 Jul 2022 at 17:27

Karl said:
No you’re right they are smaller. The updated drawings have a lot more detail and text all over them, so probably easier to look at the ones I’ve posted as an idea of what we are trying to achieve. The model is largely the same but you’re right the opening is a bit smaller.
For what it’s worth, the opening is 3.6m for a 3.5m door that i mentioned earlier in this thread.

To be fair, getting a steel to support a span of 5 odd metres I believe you start getting increased depths, which you don't want, so it's a bit of a balance.

Any more photos?

{SAS}TB · 11 Jul 2022 at 17:29

Karl said:
Week 4:

The whole building collapsed because the bolts failed.

Only joking.

Floor joists have gone in, and the perimeter of block work began.

Wife for scale.

The steel lintel going above the bi-folds was meant to go in today, but unfortunately it hasn't been manufactured in time, so that'll be done next week now, along with the gables and roof construction.

Oh, also, the building inspector came and signed this stage off, so will next attend when we've go the roof on!

Far too soon for the bi-folds tbh. They'd get damaged - later the better. Just before they plaster.

Karl · 12 Jul 2022 at 09:08

{SAS}TB said:
Far too soon for the bi-folds tbh. They'd get damaged - later the better. Just before they plaster.

The lintel is the load bearing steel to support the gap for the bi-folds. The doors themselves won't go in for at least 3 - 4 weeks.

{SAS}TB · 12 Jul 2022 at 09:10

Sorry, misread it was the lintel !

Karl · 12 Jul 2022 at 09:13

Buffman said:
To be fair, getting a steel to support a span of 5 odd metres I believe you start getting increased depths, which you don't want, so it's a bit of a balance.

Any more photos?

Trying to keep them weekly so that I can summarise a little bit, but here's one of the lintel in, plus a bit of roof:

Any particular areas of interest?