Headroom under stairs.

[Deleted member 174758]

And don't disturb the wedge! Still not convinced that your steel will be stiff enough to support the outer stringer in the longer term

 

[cdbe]

The landing steel in now in. Fairly straightforward with the messy bit being the new lintel.

The steel for the outer stringer is massively strong - it's 30mm deep and 20mm wide - I reckon I could hang a small car from it:

I just need to work out how best to enlarge the existing mortice in the newel post with my rudimentary tools so I can slot the steel in:

Strangely (certainly to me who's only ever built one staircase before) there are no wedges in this area of the staircase.

 

[cdbe]

All done now. The existing mortice slot was pretty much the right size for the steel, just needed lengthening and widening a bit and some packing pieces inside before the steel slotted in:

All feels extremely solid, probably more than it did before as the glue blocks weren't doing much so I replaced them with a length of angle iron.

Although not possible to tell from the photos, the whole area feels a lot more spacious than it did before, and will be more so when I move th

 

[big-all]

how have you transferred the load from the bit off the string you have removed to the newel post ??
it looks like you have removed the bit from the string and just supported the tread??

 

[big-all]

ahh ok the bit with the spike just seen it

 

[cdbe]

ahh ok the bit with the spike just seen it

Yes, I used a tube of PU40 for gapfilling and smeared it over the bottom leg - hopefully it will take filler better that the bare steel.

 

[big-all]

was it a good tight fit ??
this comment is mainly help others reading this thread for guidance
dont know the quality or characteristics off pu40 sealant but some shrink in use iff a large volume and can skin over and take ages to fully cure/harden but sure you will know that already


[wheres the smillies gone lol]

 

[Deleted member 174758]

was it a good tight fit ??
this comment is mainly help others reading this thread for guidance

Well, we all like a tight fit, B-A. The one thing I'd caution against is just cutting into stringers like this. It doesn't always end well

 

[big-all]

no indeed not something i would do
my thoughts where lean from the main flight would be contained by the big square frame and not overly load the cut string sideways

 

[cdbe]

Everything was pretty tight, just a thin layer to take out any minor unevenness, anything else would have been packed.

To be honest, I struggle to understand how the various forces on a staircase like this are carried - I look at them and think they should just collapse in a heap, but they don't. I did build my own (straight) staircase for my loft conversion some years ago and thought it was going to be a disaster - but it was quite amazing to just knock those wedges in and see a pile of wood turn into something rock solid.