Robbo
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Am I miss reading this ... the impression i got was the existing steels were to act as a break between spans and the info given to s.s,. was that the original walls, now rsj'swould have to be replaced to act as bearers for sturdier floor joist, and I considered that the steels now in place would surfice if they are of enough capacity.? A new joist chopped into your half of a party wall is sufficient bearer, alternately they can be sat on joist hangers and you have the added bonus of fixing the original to the new, Joisting is usually one of the lesser problems to overcome, its the fire issues that are the real bug bears.
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