I would suggest using aluminum and screws. Cover the edge of the carpet, don't just abut against the carpet.
I think that there will be enough give in the carpet that any nail through the poplar and carpet will wiggle loose. Also, "High Traffic" and "Poplar" don't really go together.
I think that there will be enough give in the carpet that any nail through the poplar and carpet will wiggle loose. Also, "High Traffic" and "Poplar" don't really go together.