NDS help (im confused) with simple post and beam bolts
NDS help (im confused) with simple post and beam bolts
(OP)
Sorry in advance, this is remedial stuff:
I'm trying to size bolts for a porch. 8" round posts are 10' on center and resting on top of that post is a 4"X12" beam notched into the top.
The notch is cut out of the top of the post as to create a saddle condition for the beam to sit in. Top of beam and post are flush.
THis is now a double shear condition/connection?
My main concern for this condition is uplift. I have 2500 pounds of uplift per post. Using the NDS for Southern Yellow Pine, I'm getting a requirement of two 3/4" bolts when looking at Z parallel (1330 each bolt for the side member)
Can someone help me understand my loading conditions with repsect to parallel and perp to grain? When using chart 11F do I just got with the lowest Z value and design for that?
My initial thought is that both beam and post would be loaded perpindicular to grain under uplift forces.
thanks in advance.
I'm trying to size bolts for a porch. 8" round posts are 10' on center and resting on top of that post is a 4"X12" beam notched into the top.
The notch is cut out of the top of the post as to create a saddle condition for the beam to sit in. Top of beam and post are flush.
THis is now a double shear condition/connection?
My main concern for this condition is uplift. I have 2500 pounds of uplift per post. Using the NDS for Southern Yellow Pine, I'm getting a requirement of two 3/4" bolts when looking at Z parallel (1330 each bolt for the side member)
Can someone help me understand my loading conditions with repsect to parallel and perp to grain? When using chart 11F do I just got with the lowest Z value and design for that?
My initial thought is that both beam and post would be loaded perpindicular to grain under uplift forces.
thanks in advance.






RE: NDS help (im confused) with simple post and beam bolts
I assume the grain of the post runs vertical and the grain of the beam runs horizontal.
RE: NDS help (im confused) with simple post and beam bolts
The uplift load causes parallel to grain in the column anf perp to grain in the beam.
akastud
RE: NDS help (im confused) with simple post and beam bolts
The Z parallel numbers, is that using both members in parallel loading which I dont have?
So using Z main perp I get 1550 per 3/4" bolt. What if my Z side perp was less than that number? (they are both 1550) Would I design with that?
thanks again.
RE: NDS help (im confused) with simple post and beam bolts
RE: NDS help (im confused) with simple post and beam bolts
Ron...
where have you been lately?
RE: NDS help (im confused) with simple post and beam bolts
Hope you're doing well.
I'll send you an email and fill you in.
RE: NDS help (im confused) with simple post and beam bolts
Mike McCann
MMC Engineering