I just measured the distance: 9.50 meter.
My house has a strange shape. The following ASCII art is an attempt to illustrate it. AP is the access point, and B is the bridge
Code:
| AP |
| |
| |
| |
| |
| |
| |
| |
| |
| |
|------ door ------|
\ \
\ \
\ \
\ \
\ \
\ \
\ \
\ \
\ \
\ \
\ \
\ \
\ \
\ \
\ \
\ B \
It took me quite a while to figure out the right position. I had to configure both devices in the living room at a distance of about 3 meter. Then I moved the bridge to its final position. While watching the signal strength I played with small variations in direction till I found the one with about 90 - 95% signal strength.