ROHN's FR45G flat roof mount is designed to bolt directly to a water-tight and appropriately reinforced flat roof or other similar surface for guyed applications of the Rohn model 45G tower. The Rohn FR45G is not to be used as a self-supporting base plate. For self-supporting base plate please see the Rohn 45GSSB.The FR45G base plate uses double-bolted joints for connecting directly to a standard Rohn 45G tower section that are proven to be the best method of joining tower sections for sturdiness and dependability. Roof-mounted tower designs may severely limit the potential height of your structure. Please consult your TESSCO technical service representative for additional information.Towers mounted on the FR45G flat roof mount must be guyed or bracketed at all times. Temporary steel guying may also be necessary during installation and dismantling.