Apols @Hugh Jaleak , I just re-read my beer goggle post on Sat night and it was basically saying the same as your previous post, I wasn't meaning to repeat what you had already said.
Also, I have asked him the joists size, he has only given me the size of the pipes. I guess he doesn't know, I am afraid.
We have contacted a structural engineer and like you professionals he has also confirmed that "there is a severe damage to the joists."..
Regards,
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local