Hey Everyone,
Sorry if this has been discussed before. I read everywhere to use grade 8, 6", 3/8 bolts for bolt climbing. I believe this to be good advice, but am wondering why not grade 5? Looking at this chart:
I'm not positive on how to read the above chart to please weigh in if you do. Reading this, I think a 3/8 bolt (.375") will have a shear strength of 8280 (grade 5) or 10050 for grade 8. I get it. More is better. I also get that everyone says grade 8. I also know you probably use grade 8, not grade 5.
What I am wondering is... is grade 5 also safe? If they aren't, what is it about them that makes them unsafe? Just looking to learn here from someone out there that has likely done the research on forces and torque.
Sorry if this has been discussed before. I read everywhere to use grade 8, 6", 3/8 bolts for bolt climbing. I believe this to be good advice, but am wondering why not grade 5? Looking at this chart:
Grade 8 vs 10.9 High Tensile bolts | Alloy Steel class 12.9 Studs
High Tensile is very strong, long-lasting carbon steel, find here the Difference between Grade 8 and 10.9 bolts and studs. Compare composition, mechanical properties, and strength.
www.hiteshsteel.com
I'm not positive on how to read the above chart to please weigh in if you do. Reading this, I think a 3/8 bolt (.375") will have a shear strength of 8280 (grade 5) or 10050 for grade 8. I get it. More is better. I also get that everyone says grade 8. I also know you probably use grade 8, not grade 5.
What I am wondering is... is grade 5 also safe? If they aren't, what is it about them that makes them unsafe? Just looking to learn here from someone out there that has likely done the research on forces and torque.