How do I remove floorboard nails from joists?
The nails are ~3-4mm diameter with no heads.
I've tried claw-hammer and wrecking bar with no success because without nail-heads, I cannot get purchase.
I guess I could attack them with a hacksaw and leave the lower part embedded, but I don't like that notion very much because around some of the nails, rust-stains are spreading which I guess is a vector for damp (??).