Anchor Bolts on Granite Wall
Anchor Bolts on Granite Wall
(OP)
Hi all,
I'm designing a steel deck for a floor, with a group of simple supported beams, that will be connected at each end to a masonry wall made of granite (figure below). I´m trying to determine the number of anchor bolts that it will be required on the connection to the wall, but I'm having some trouble figuring out the design resistance of the anchor when fixed to granite.
I´m using Hilti' product HIT HY270 + HIT V(5.8) M12, but on their technical tables, they do not show design resistance for granite. The force that I will need to transmit is around 15 kN.
Thank you for the help.






RE: Anchor Bolts on Granite Wall
RE: Anchor Bolts on Granite Wall
RE: Anchor Bolts on Granite Wall
RE: Anchor Bolts on Granite Wall
There´s no cutting granite operator. This is a rehabilitation and they will just anchor the beams to the wall, and execute the floor with standard materials (osb, thermal insulation etc)
RE: Anchor Bolts on Granite Wall
Dave
Thaidavid
RE: Anchor Bolts on Granite Wall
On a recent project, we're using dowels grouted somewhat horizontally into rocked, mostly gneiss, to provide stability for concrete walls. The rep from Powers came out and did some pull tests for us. I think Powers has some info for stone; I'll have to check on Monday when I get back to the salt mine.
RE: Anchor Bolts on Granite Wall
Am i understanding correctly that you will have a beam mounting to the granite wall with some sort of plate anchored to the stone. Load will be transferred via shear in the bolts?
How thick is the granite wall? I'm thinking you are going to have to do some surface prep involving grinding and cutting just to get a good flat working surface to mount what ever you are going to mount. If so, could a little shelf or pocket be cut in so that you are transferring load via bearing and the shear in the bolts? No easy way to do the math on that but it would build some redundancy in the connection since you might not have perfect information on the anchor's capacity in the stone.
Also, if you have the space available; maybe your mounting plate can be enlarged so that you can get additional anchors in the stone?
RE: Anchor Bolts on Granite Wall
Thank you for the answers. Below is a sketch of the solution that I´m currently pursuing, with cold rolled beams C250x70x2.5 spaced of 625mm.
@JoelTXCive the wall is 400mm thick. I don't think it will be possible to create a "shelf" where the beam would be supported. The shear must be transferred only through anchor bolts, unfortunately.
RE: Anchor Bolts on Granite Wall
RE: Anchor Bolts on Granite Wall
Masonry solutions are also experts similar to Cathedral. http://www.masonrysolutions.com/
-Mac
RE: Anchor Bolts on Granite Wall