Mast size for antenna

[SIMON11]

On an older CB antenna I did we were worried about the wind loads on the chimney/antenna and if it would damage the chimney. To solve that problem we took 4 pieces of heavy galvanized angle iron and put them on all 4 corners of the chimney from the roof line to the top of the chimney (about 2-feet each in my case). Then we put the chimney straps for the antenna around them. It was very secure and the chimney never moved.

At first this sounds a great idea! But then I think that this will guarantee that it all comes down if the wind is strong enough. It just takes the bottom layer of cement to be bad.

 

[fuzzymoto]

Not if you extend the angle iron to the house level. Depending on your chimnet/house intersection you can mechanically attach it to the house also. We actually had a crack in the chimney and a huge CB Beam antenna (and I do mean HUGE) with a rotor mast with a terrible offset and it worked great. Some people use different lengths of iron also. Hard to say how well it will work without seeing the chimney.