When clamping long or wide panels with bar clamps, a dowel inserted crosswise between the jaws of the bar clamps and the wood will help center the pressure and keep it uniform. Use dowels about as thick as the thickness of the wood you are gluing up.
Before you install a rooftop antenna or satellite dish, be sure it is away from any power lines. It’s best to locate antennas and dishes where they won’t touch or fall on electrical lines if they happen to be blown off. Also, be sure to properly ground them to avoid any electrical damage to your home and appliances.