Epoxy for Stone and Steel 1

[phamENG]

Anyone have any good recommendations for an epoxy that can bond steel to stone (assuming granite for now)? Existing lintel holding up face brick cracked during window install. Lead time for a replacement is prohibitive (original over 100 years old). I'm hoping to use the original stone and build a steel lintel to support it, but I need some nominal composite action. Sika says their anchor epoxy works with stone, but 1) they don't give values and 2) this is going to be more of a gluing a plate on shirt of thing. Anyone have a known product?

Not at my desk now, but I'll be doing some more research this evening...

Thanks everyone.

 

[masonrygeek]

You might look into a cast stone lintel that has internal reinforcing. Try some of the members of the Cast Stone Institute to see what their availability is for this:

https://www.caststone.org/producer_members.htm.

This would all of the issues you are dealing with.

 

[dhengr]

PhamENG:
What would happen if you cut your red stl. lintel plate 2" longer than the stone lintel on each end? You said they are going to take the stone lintel out to work on it, right? Then, weld a 1.5"x1.5" stl. bar across one end of the stl. lintel plate, and cut another 1.5"x1.5" stl. end bar also. Place the stone lintel on the stl. lintel pl., having cleaned up the crack so it fits back together nicely, and mark the lintel length. Weld the second stl. end bar 1/8th inch short of the marked lintel length, you guess this length amount after playing a bit with the pieces. You are trying to prestress the stl. lintel pl. a bit, to reduce the epoxy creep over time. Setting the stone lintel back on the stl. lintel pl. should show just a bit of arching, at the crack, in the stone lintel, again, your guess. The crack gets epoxy, as does the stl. pl., and the stone is pressed down, at the crack, to make a good butt joint and prestress the stl. lintel pl. a bit, at least a very tight lengthwise fit.

The angle lintel, with the vert. leg up might work thus. Would it be easier to saw cut a 3/8th by 6" high chunk out of the timber lintel to make space for the vert. angle leg? A little chisel work is req’rd. at the timber ends and corners of the cutout.

 

[phamENG]

Thanks, masonrygeek and dhengr. I like dhengr's idea, but it is now moot.

masonrygeek, in "lead time for a replacement is prohibitive", I was referring to any kind of replacement. Carved stone to match or cast stone. There are only a couple of cast stone shops in my region, so they are never an attractive option, especially when you're in a hurry. But...

The fates have forced our hand. They finally got all of the staging and scaffolding up to get at these things (elevated level in a busy downtown area), and the mason got it taken apart. Seems water has been getting in here for decades and the stone is shot. No hope of doing much with it. So we're stuck with cast stone. Oh well.

Thanks for everyone's thoughts. Several good ideas and tools added to the toolbox, even if I didn't get to try them out this time around.