Substrates for large hanging sign

[dcsheets]

I would like some advice on substrates. I going to start working on replacing an elevated back lighted sign with a sign that is not. The sign itself will still be elevated, but it is only supported from the top. I would like to sandblast it, and I was thinking about using HDU. But I am afraid it will break with no side supports. Any information would be great. Also needs to be light weight.

[dave parr]

How big is it going to be? Is it single or double faced? Hanging from a building or pole?

The more durable HDU can get heavy. How thick are you thinking?

[dcsheets]

The sign will be hanging from a pole, and will be two sided. Size is 3' x5' and I'm thinking 1" to 1 1/2" thick. Thank you for your reply.

[dave parr]

I'm just thinking outloud here. I'll bet you could come up with a hanging method that would double as a supporting method for a double faced sandblasted sign. With the framework between the faces, the face material wouldn't need to be as thick, so the 1" HDU for each face would probably do.