Started by Medeek, March 12, 2013, 03:33:08 AM
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Quote from: Don_P on January 24, 2016, 03:24:02 PMSomewhere... There is a clinching limit, I believe not beyond 12d, I think to prevent tension perp splitting.Pallet manufacture uses hardened gun nails which will get closer to double shear without clinching but that is not a common gun nail. They also use a technique called "spotting" where they use a nail slightly longer than the assemble thickness and shoot it together over a steel plate. The nail connects then hits the plate and deforms a bit. Again probably not something for the field just info. I'm not sure if it will help in thinking about the yield limit programming but the awc.org connections calc is using the NDS equations. ~3/8" to clinch, that seems doable.
Quote"Exception; Symmetric (!) double shear connections when 12d or smaller nails extend at least 3 diameters beyond the side member and are clinched, and side members are at least 3/8" thick"
QuoteException: The minimum length of penetration need not be 6d for symmetric double shear connections where nails with a diameter of .148" or smaller extend at least 3 diameters beyond the side member and are clinched, and the side members are at least 3/8" thick.
Quote from: Don_P on January 24, 2016, 08:05:34 PMCorrect me, is a .120x3" nail with 3/4" gussets unclenched in double shear?Or, is a .120x3.25" same conditions, shot through, unclenched.Effortwise nailing is pulling a trigger, clenching does take time. That said I think the economical way is to use the thinnest ply and count on clenching these.
Quote from: Don_P on January 28, 2016, 03:40:17 PMRev2, the ridge to jack... I'm having trouble following the load.Rev5 I would probably make the main roof hip the support and run the other valley up to the hip, shorter beam length.I typically double hips and valleys, the inside miter is then half on each piece, simple compound bevels. I've also run a single bevel on the valley and run that subfascia first, carrying it past the valley to the wall and then butt the adjacent sub into the first one.