billcoe Posted August 26, 2004 Posted August 26, 2004 http://www.chockstone.org/TechTips/SandstoneBolting.htm Saw this and thought it was great stuff which should be posted here. Didn't see it, apologise if it's been posted previously. Bottom line: glue-ins for sandstone. Incorrectly mixed glue will be radically weak. (10kn). Well mixed glue and deep threading on type 316 stainless gets a real strong 42kn rating. On a shear type pull,using the bolt/hanger combo: the hangers deformed at 26-27kn. Once you are out of the lab, if you get that kind of strength, your biner (or webbing) would fail before the bolt or the hanger. Still be interesting to see this done by a U of W engineering student for basalt. Any takers? PS, the above was the summation of a cliff notes version of the testing. Don't diss me for being a lightweight, read it all if you are interested, there's a lot there. Regards: Bill Quote
Dru Posted August 26, 2004 Posted August 26, 2004 what kind of sandstone? there is a wide variability Quote
dylan_taylor Posted August 26, 2004 Posted August 26, 2004 probably the permeable and porous kind. Quote
Off_White Posted August 26, 2004 Posted August 26, 2004 umm, yeah, the type that's sedimentary. Quote
billcoe Posted August 26, 2004 Author Posted August 26, 2004 what kind of sandstone? there is a wide variability You want me to click the link, read the whole f*en thing, and post it here? They even detail the hardness and everything. The report is very specific. Ok I'll check. ............................................................................................................................................................................................................................................................................................................................................................................. ........................................................................................................................... .............. ............... .............. ............... ................ ................. Dru: they say it's Australian Sandstone. Quote
Dru Posted August 26, 2004 Posted August 26, 2004 so probably nothing like the vertical sandbox in offwhite's back yard then...for instance Quote
Off_White Posted August 26, 2004 Posted August 26, 2004 Yep, there's nothing here for you, these are not the droids you're looking for, move along now. Quote
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