When you order your Hovr Brackets, they come with our recommended #8, 2 1/2" pan head screws. We've had customers ask how deep these need to be in the framing studs in order to have a successful install in the past, so we thought we'd put some more info on it here.
The upper part of the male bracket (seen above) is 1/4" thick. This means assuming the drywall is about 1/4" thick (standard), the top screw will be in the wall by about 2".
The bottom of the bracket is only 1/8" thick, so the bottom screw will be even deeper in the stud (by 1/8")
Based on a two-stud install within our recommended parameters (shelf depth, etc.), you use the below formula to approximate holding strength:
Each #8 2 1/2" screw which will be in the stud by 2 inches has a holding capacity of 70lbs (Canadian Builder Association Standards) - Example: 40 studs at 70lbs = 280lbs capacity.
We don't include the bottom screw in our calculations, primarily because it is mainly a safety/stabilizer and are not the main holding factor. That said, this DOES NOT mean you can just skip using the bottom screws.