Which Retactable Awning Bracket Mounting Option
I have to mount a 10′ x 8′ retractable awning to the side wall of my house. The house has cedar clapboard, 1/2″ plywood sheathing and the attachment area is a cantilevered wall so there is a 2″ X 10″ header in the attachment area. I will attach (2) 2″ X 6″ mounting blocks to the wall and then attach the (2) metal awning brackets on the mounting blocks.
Option #1: Attach each mounting block to wall with 4″ structural screws…4 screws per block. Attach each awning bracket to mounting block with 4″ structural screws or 3/8″ lag screws…2 screws per bracket. The rim joist/ header penetration wil be 1 1/8″ to 1 1/4″.
Option #2: Pre-attach each awning bracket to mounting block with 3/8″ carriage bolts…2 bolts per bracket. Attach each mounting block to wall with 4″ structural screws….4 screws per block. The rim joist/ header penetration wil be 1 1/8″ to 1 1/4″.
The awning weighs about 40 pounds.
Does anybody have a preferred option? I was originally all set to use option #1 but then figured that option #2 may make it easier to get the awning brackets level with each other. The brackets will be about 9 feet apart. I have a long pole or will use a string level.