That seems to be what all the engineers say. And, I am sure they are correct. I just can't make myself do it that way. I used 1 per attach point on my first KR, and it worked, so I feel comfortable with it. I think it is the thought that if any one of those bolts fail, it is all over.
See N64KR at http://KRBuilder.org - Then click on the pics See you in Mt. Vernon - 2006 - KR Gathering There is a time for building and a time for FLYING and the time for building is OVER. Daniel R. Heath - Lexington, SC -------Original Message------- A better design is to use one long bolt with a compression member between the WAF pairs instead of paired short bolts, placing the joint in a balance double shear. This is my considered opinion as a professional engineer.
