I am having steels installed next week so have been looking at the joist set up on the 1st floor. I need a joist depth of 250mm so 10x2 timbers to accomodate a soil pipe within the floor void below the steel.
Existing joists are 7x2 so they need to be 3" deeper. Can I extend the existing after they are cut into the steel or should I just remove them and install new 10x2 joists?
Existing joists are 7x2 so they need to be 3" deeper. Can I extend the existing after they are cut into the steel or should I just remove them and install new 10x2 joists?