The Siren Board

I've seen pictures and movies of T-bolts on top of buildings and their horns are angled a bit downwards rather than at the usuall 90 degrees. Can someone tell me how that is done?

I think you're seeing the entire siren head at an angle. The winds cause the horn and rotor assembly to slightly tilt upwards.

Really doesn't answer what I was talking about.

Look at this T-bolt's horn:
http://www.longislandfirealarm.com/Mineola1800.wmv

It's angled so it points downwards a bit.

I know what your talking about. I'm not sure as to why either, but perhaps from looking at this ad, maybe they were originally made like this?

It's due to the horn-support bars. But I don't know the purpose.

Those were the early thunderbolts I belive.

Wow, a T-bolt with rounded covers for the Blower and rotator. I bet they wern't made for the simple fact it was cheaper and easier to just make a regular box.

lets go with the most obvious and plausible answer here. all of the angled hornes i've seen a relatively high moutings. they must have bent the horn down a little bit using machinery. its not that hard to do. they probably wanted the sound angled down a bit.

I know they're mounted in High places and why they bend them down (so the sound doesn't shoot over the public's heads) but my question was how?

I figured in had to do something with the braces, supports, etc that hold the end of the horn.

I think they moved the supports backwards on the motor housing.