I have two EAP245's that have to be mounted on the wall, close to the ceiling.

Will using a metal L-bracket such as this cause any signal problems?

The brackets measure about 8" x 8" x 1.5". The plastic mounting plate that comes with the units will be attached to the bottom of the L-bracket so that the WAPs will be oriented as if they were hung from the ceiling.

UPDATE (2022/04/25, 23:04:00):

I ended up using flat straps because the metal was thinner and the predrilled holes were a little smaller. So far, so good.