RCA DIRECTV PLUS 15407690 - Manual (Page 22)

Mounting the Mast
20 Chapter 2
Installing a Spacer
When the mounting foot spans two pieces of siding, it should be
positioned so most of the foot is on the top board. A spacer should be
installed to help hold the bottom of mounting foot in place. The spacer
can be made of either solid wood or plastic.
spacer
lap board
8. Install two 5/16" x 3" lag screws into the two center holes on the mounting foot.
Securely tighten the screws into the center of the wood beam.
9. Put washers on the 5/16" x 2" lag screws, insert the screws into the four outside
holes and securely tighten them.
10. Go on to the next section, “Final Installation,” to complete the installation process.
5/16" x 2" Lag Screws
5/16" x 2" Lag Screws
5/16" x 3" Lag Screws
Steps 8 & 9: Inserting the lag screws.