Sandstone Sign - Secure fixing indea needed?
Sandstone Sign - Secure fixing indea needed?
(OP)
Hi, I am making a sandstone sign and it has a sandstone engraved pannel in it, this pannel is 860mm by 440mm and its 50mm thick. I needed a strong bracket to attach it to the frame from the back. Any ideas would be great. Thanks. Rob





RE: Sandstone Sign - Secure fixing indea needed?
RE: Sandstone Sign - Secure fixing indea needed?
"Art without engineering is dreaming; Engineering without art is calculating."
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RE: Sandstone Sign - Secure fixing indea needed?
RE: Sandstone Sign - Secure fixing indea needed?
"Art without engineering is dreaming; Engineering without art is calculating."
Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of these Forums?
RE: Sandstone Sign - Secure fixing indea needed?
Can you build a frame around it? If the frame wraps around all the edges, you do not have to worry about adhesive.
RE: Sandstone Sign - Secure fixing indea needed?
The best ones I've seen have had a groove milled horizontally in the back (staying at least on thickness away from each side) and a piece of angle iron (with the necessary hardware welded, soldered, or glued to the angle) epoxyed into the groove. The groove should be between 1/2 way up from bottom and 2/3 up from the bottom and I'd make it to accommodate 25 mm angle (don't worry about it breaking, the epoxy is a lot stronger than the rock).
This chunk of friable material weighs over 40 kg so you need to think "industrial" instead of "consumer".
Just out of curiosity, will the sign hang on the wall or sit on the ground? Even if it sits on the ground, the above will give you a way to secure it from walking off.
David
RE: Sandstone Sign - Secure fixing indea needed?
RE: Sandstone Sign - Secure fixing indea needed?
RE: Sandstone Sign - Secure fixing indea needed?
We have doweled numerous stone panels and I have investigated failures of same. Dowels installed at 45 degree angle (downward from panel to substrate) work well.
Shelf angle works as well, but you have a corrosion issue to deal with if in an area where water intrusion is an issue.