Epoxy Anchors in Limestone

[MrPete70]

I am currently trying to attached a premanufacutred aluminium canopy to a glass curtain wall with no luck what so ever. My last ditch effort is to run a steel member between existing columns, however, because of the location one of them I cannot make the attachment. As a result, I will need to attach one end of my steel member to a limestone veneer. Are there any values for an expoxy anchor into this type of material?

 

[MintJulep]

I wouldn't do it.

You have no idea how the veneer is attached to the column or how much load that attachment could support.

 

[PackerFan]

Typically for this type of attachment, a epoxy (ex: RE 500, not a hybrid adhesive like HY 150) can be used for attachment into natural base materials. Either you would need site specific testing for this attachment or you could use the bond strength equation.

Ultimate Strength = Tau x Pi x Rod Diameter x embedment.

Tau = bond strength, for concrete this is typically in the range of 1000-2000 psi depending on the quality of the product. For limestone, this value could vary depending on the "quality" of the stone. You would then use a safety factor to determine your allowable load. Obviously, use this equation with caution, site testing would be better. The mfg should do this for you for free.