I have encountered about issue with my planning.

First off its 3/4" brazilian cherry that I plan to lay.

The house has 8" concrete block walls and in one hallway (13x3) I have to across over this concrete block wall where the arch way is (6ft), plus another small spot (2 ft) along this hallway.


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[][][][][][][][][]WWWWWWWWWWW[][][][]
>>direction of floor

[]= concrete blocks
W=wall

The flooring will run parallel over these blocks. Now I plan to lay 3/8 plywood over the floor and over the blocks, BUT I can't nail into 3/8 so how should I secure the planks over those 2 spots?
It was suggested to me to glue them down with wood glue.

I gotta admitt. I am confused....

Its really confusing to understand without pics. But not to worry, i had a friend of mine who has done many hardwood installs at work, he's a carpenter and he sorted it out for me, need to make a threshold.