Ok I wish to increase the size of an internal opening to a 4" ground floor wall.
At the moment there is a 4ft steel box lintel across the old opening.
Above this lintel is 4" of block work which is what the floor joists are sitting on.
When I increase the opening size one more joist will need supporting.
I was going to put a 1800mm steel box section joist in but these seem to cost around the £50 mark.
I see that a concrete one will cost me a lot less.
My question is will a concrete lintel be safe to use over this span.
Cheers
Paul
At the moment there is a 4ft steel box lintel across the old opening.
Above this lintel is 4" of block work which is what the floor joists are sitting on.
When I increase the opening size one more joist will need supporting.
I was going to put a 1800mm steel box section joist in but these seem to cost around the £50 mark.
I see that a concrete one will cost me a lot less.
My question is will a concrete lintel be safe to use over this span.
Cheers
Paul