Advice on loft status...

[ab122]

So the previous owners had quite a bit of work done to the top floor of a 1930s semi we now live in. All top floor ceiling rafters were removed and replaced with two steels, 1 spanning the back of the property from side to side and one spanning the front. They have then replaced all joists with new rafters/joists and created a new 1st floor ceiling/loft floor.

 

They have also mapped out the stair opening for future stairs on a loft extension, and evidenced triple bolted beams for the said openings, these beams are bolted to a triple from steel to steel and then sat on the outside wall of the house..

 

All the rafters/joists cross from back of house across, sit on a load bearing wall going all the way down the property to the foundation and then follow across to the front steel.

 

I've been told that the floor is "done" and it's ready for a dormer and gable without the need for any floor work; it's current status is basically a room, with veluxes but with a pull down ladder.

 

Can someone help me understand what steel may be needed to continue with a dormer and hip to gable (yes I will get plans and an SE when needed) but currently just trying to understand the situation...

 

The chimney breasts had also been removed with the use of gallow brackets, so I assume when doing a full conversion a steel will need to cross from end to end to support the chimney stacks in place of the gallow brackets, but are any others likely to be needed?

 

A crappy sketch to try and give a picture of what I have.

 

Red is steels, yellow are joists, singles and triplets (joined by the cross lines I've shown) and then blue is the space for hypothetical stairs

 

[JohnMo]

No sketch attached?

[ab122]

3 hours ago, JohnMo said:

No sketch attached?

 

[ab122]

Anyone any thoughts?

[Mr Punter]

You could just get a SE to look.  They won't charge you much and you need one anyway.