climber511 Posted January 14, 2004 Share Posted January 14, 2004 For Bender, Shrug, or anyone else I just picked up some 5/16" x 6" carriage bolts and some 1/4" square CRS (I figure on trying 7"+ pieces first). How will these compare to IM nails, bolts, or Davids Challenge bars? I'll check them for strength as soon as I get some free time but thought I'd get your opinions also. I figure they both will be harder than anything I have done so far. Thanks Quote Link to comment Share on other sites More sharing options...
bender Posted January 14, 2004 Share Posted January 14, 2004 If the blue is 260 and 60D's are 240-310, a 6" piece of 1/4" square is around the 290-300+ mark. The 5/16" bolt is "way up there", and the one I tested was harder than the RED. A better bender would have to answer that one. Quote Link to comment Share on other sites More sharing options...
climber511 Posted January 14, 2004 Author Share Posted January 14, 2004 Eric , Thanks for the quick response. Looks like maybe I got ahead of myself a little bit - or a lot. I'll try cutting the 1/4" sq to 7.5" and see what happens. The 5/16" x 6" is a carriage bolt with full threads, I figured it to be doable but real hard for me - sounds like I'm half right - real hard but not so doable. Oh well, they'll look nice hanging up with my Reds and 200K challenge bars in the "someday" case. I'll give them a go and let you know if I can even kink either of them. I'll still weigh them and let you know that also. Thanks again. Quote Link to comment Share on other sites More sharing options...
bender Posted January 14, 2004 Share Posted January 14, 2004 The 5/16" x 6" is a carriage bolt with full threads Full treads make it VERY easy. I'd say about a 230-250. Simple. I thought you were refering to a solid bolt with only the end threaded. Quote Link to comment Share on other sites More sharing options...
climber511 Posted January 14, 2004 Author Share Posted January 14, 2004 Eric I just weighed the 5/16" x 6" carriage bolt - 265# to bend it about 1/2". Nice call - they now come out of my "someday" case and into the "next time" box. Quote Link to comment Share on other sites More sharing options...
supersqueeze Posted January 14, 2004 Share Posted January 14, 2004 David Horne tested 1/4" square CRS at various lengths and published the results in Iron Grip. Actually it is 6mm square, which is just a hair less than 1/4". His findings (I hope he doesn't mind) 7" 170k 6 3/4" 180k 6 1/4" 200k 6" 210k Mike M. Quote Link to comment Share on other sites More sharing options...
climber511 Posted January 14, 2004 Author Share Posted January 14, 2004 (edited) It looks like I might actually be able to use both of the items I bought. The carriage bolts should be hard but doable for me and the 1/4" Sq. CRS should be OK to start at about 7.5" and start shaving down gradually. Cold roll always gives me more trouble than Hot roll of equal strength - it just seems so much harder to get started but not much different after that. No "spring" or give to it like the Hot roll. Supersqueese - did David's article show strengths for 1/4" Sq. Hot Roll - Curious about the difference? Thanks Edited January 14, 2004 by climber511 Quote Link to comment Share on other sites More sharing options...
supersqueeze Posted January 15, 2004 Share Posted January 15, 2004 No it did not give any data for square HRS. I only have HRS and have not been able to find square CRS so I have been curious about the difference as well. Mike M. Quote Link to comment Share on other sites More sharing options...
climber511 Posted January 15, 2004 Author Share Posted January 15, 2004 OK Curiousity got the best of me - I wasn' supposed to bend today but just had to know. The 5/16" x 6" carriage bolt was hard - started OK then got really tough in the middle and crushed OK. I cut a piece of my 1/4" sq CRS 7" long and grabbed a hold - nothing - gave it another shot - twice as much nothing. Stepped back and physced up - still nothing. I got out my loading pin carabiner, etc and started piling on the weights - it finally bent about 1/4" with 340#. Whoa - tough stuff!! and way out of my league. Quote Link to comment Share on other sites More sharing options...
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