ROHN's R-BPH25G hinged base plate is hot-dip galvanized and comes pre-drilled for use with six (6) 1/2 in x 12 in J-bolts (or equivalent) protruding through pad. The 15 in square base plate allows for the tower to be tilted up at the base during installation. The Rohn R-BPH25G can be used in guyed or bracketed applications only and is not recommended for use in self-supporting tower configurations. BRBRJ-bolts sold separately.