A mounting flange for a monopole includes a generally annular main panel surrounding a central hole. The main panel includes a plurality of first mounting holes that are substantially circumferentially equidistant from each other and at a first radial distance from a center of the central hole. The main panel also includes a plurality of second mounting holes that are substantially circumferentially equidistant from each other and at a second radial distance from a center of the central hole, the second distance being greater than the first distance.