"Mike" wrote in message
...
I am installing 3/4 inch oak hardwood in a hallway 20 ft long and 4 1/2 ft
wide. I am installing it the "long way" on a 5/8 inch plywood subfloor. My
problem is that the 12 inch floor joists change directions so that the hardwood
will be parallel with the joists for the last 7 feet of the hallway. The joists
are on 16 inch centers and I thought about going under the floor and installing
blocks between the joists, but the central heat ductwork is in the way. The
only way I can put blocks in is to cut into the subfloor and pull enough of it
up to put the blocks in from the top. I would also have to attach blocks to the
existing joists to have something to nail to when replacing the subfloor. Is
this all necessary, or can I just lay the hardwood on the floor the way it is
for that short distance. Thanks for the help.

Ducts can be dis-assembled and re-assembled.