How NOT to install a T135 (as in Allens old T135s)

[AllSafe]

The motors are more valuable than the siren itself. Have you ever tried to price a 50hp motor?

[Jim_Ferer]

Well, they violated some codes doing an installation this way. These guys are amazingly clueless.

They'd need the help of a PE to design this. There's a lot of calculations involved for soil types, a certain weight at a certain height, etc., and wind loadings.

Some of you guys who don't work with it every day would be surprised how deep some foundations go. A highway sign structure may have 5 x 5 foot footings twenty feet into the ground with eight embedded anchor bolts or more. My company has had to sink shafts to put up railroad catenary towers.

The American Association of State Highway Transportation Officials (AASHTO) design standards for sign structures would be a good place to start.

[AllSafe]

Twenty feet? Around here that would almost be into the water table.

[hobbeekid]

CD-777,

I believe a while back you took pictures of the t 135 that was supported by the crane. do you still have those pics?

[Daniel]

If it were mine, I'd just junk the projector and rotor, fabricate a housing, and make myself a Cyclone. It would make an outstanding omnidirectional siren.

[Trey]

I'm not sure if Eric got pics of the crane supporting the siren (probably did) but I know I've got one:



And then ONE MONTH LATER*:


*You can't tell from that pic but the pole was bent into an L shape.

[CDV777-1]

Hmmmm.
That looks like one of my pics but I can't find it on my PC anywhere.
I can't imagine not taking a pic of that crane deal when I saw it that time.
Maybe it's someone elses photo.

Anyway...
What it looks like is that they tried to lower the thing down into the parking
lot with the thing still on the pole, the pole bent into an L shape because
of the side load on the pole as it was being lowered and the siren doinked
the ground when that happened. That would explain the small amount of
damage to the siren. If that thing would have fallen from the height it was
at the siren would be completely trashed.

[Robert Gift]

Glad no damage to the motor rotor stator.

If the pole was strong enough, they should have guy wired it.
Or was the pole even strong enough in the first place.

[CDV777-1]

If the pole was strong enough, they should have guy wired it.
Or was the pole even strong enough in the first place.

Quote from message number six in this thread.........

That's the same pole one of those sirens was mounted on here in Allen. One of those sirens stood on that very pole for almost 10 years in Allen with no problems.

[Robert Gift]

Thanks 777.
They should have guy-wired it.
It still looks too small.
Wonder if the 10 years it stood was dumb luck?

The 12 bells in the UC Berkeley Sather Bell tower hung for four? decades.
When they were removed to enlarge the Chime (=8 to 22 bells) to a Carillon (= 23 or more bells), engineers discovered it was WAY under engineered - not enough bolts - and were amazed it never collapsed and killed someone.