Attaching blocking to I-beam joists?

Hello. New to the forum.

I've run into a dilema with my hardwood flooring project. The problem area is an entryway & closet that is linoleum over particle/press board which has been glued & stapled to the osb subfloor. I'm finding it impossible to lift the lino & press/particle board without destroying the subfloor, and so I'm faced with renting/buying a toe-kick saw and replacing the subfloor altogether in that area. The home is about 4 years old and has 12" osb and spruce I-beam floor joists. Is it OK to screw blocking to this type of joist, and what would be an acceptable method? Any other pointers?

Much appreciated,

GA

 

Canada. I don't currently have the means to post a pic, but will try to do so in the next day or so.

 

Here's what my joists look like, osb flooring and all. The osb, in my case, is glued atop all of the I-joists, so if anyone has any tips for getting it off neatly... The lino underlay is particalboard (about 3/8")- glued and stapled.

 

Hi,
Can you also post a picture of the floor from above the basement showing the actual damage?

 

i'd pull the sub-floor, strengthen the joists by laminating ply to both sides, looking at the span the joists cover there would be too much movement in the floor, also when replacing the sub-floor screw and glue it to the joists 3inch on centre using flooring grade ply.

 

I've seen those joists before on a job in London where space was an issue for a crane to lift steel beams into place, an believe it or not i was chating with the enginere an he said they have a strength eqaul to steel beams the same size but are in weight a lot lighter enabling a few guys to just lift them into place. He did go on to say the spacing needs to be bang on and they must be lined over the top with 2 layers of marine ply not osb ply at 22mm thick.