Wood joinst with nails loaded in shear
Wood joinst with nails loaded in shear
(OP)
Hi All,
I am evaluating a wood joist joint that involves loading some common wire nails in shear. Basically the joint is simple, involving nails driven through a spandrel joist, and into the end grain of a floor joist (see attached). Typically, I have used joist hangers for this application in the past...however this time I am getting some resistance to this idea which is why I am evaluating the attached joint.
I want to determine the # of nails required, and I am designing the joint to CSA O86-01. The most relevant clause is 10.9.4 'Lateral resistance' of spikes and nails; however, this clause is for 'lateral' resistance for nails driven perpendicular to the grain, while my joint involves nails driven parallel to the grain (of the floor joists) and the forces are acting vertically.
My questions are:
1) Any suggestions if I am using the correct clause to calculate the capacity in shear for the nails?
2) If so, what is the penetration of the nail supposed to be into the joist?
3) Is this joint even allowed, and thus I should push back with the joist hangers? I don't want to do this just if I am not familiar with different types of wood joints.
Thanks
I am evaluating a wood joist joint that involves loading some common wire nails in shear. Basically the joint is simple, involving nails driven through a spandrel joist, and into the end grain of a floor joist (see attached). Typically, I have used joist hangers for this application in the past...however this time I am getting some resistance to this idea which is why I am evaluating the attached joint.
I want to determine the # of nails required, and I am designing the joint to CSA O86-01. The most relevant clause is 10.9.4 'Lateral resistance' of spikes and nails; however, this clause is for 'lateral' resistance for nails driven perpendicular to the grain, while my joint involves nails driven parallel to the grain (of the floor joists) and the forces are acting vertically.
My questions are:
1) Any suggestions if I am using the correct clause to calculate the capacity in shear for the nails?
2) If so, what is the penetration of the nail supposed to be into the joist?
3) Is this joint even allowed, and thus I should push back with the joist hangers? I don't want to do this just if I am not familiar with different types of wood joints.
Thanks






RE: Wood joinst with nails loaded in shear
RE: Wood joinst with nails loaded in shear
Look forward to any comments
RE: Wood joinst with nails loaded in shear
There is nothing fundamentally wrong with the detail, I just don't like it much.
RE: Wood joinst with nails loaded in shear
Mike McCann
MMC Engineering
RE: Wood joinst with nails loaded in shear
RE: Wood joinst with nails loaded in shear
Thanks for the input. I will go with my first thoughts and push back with joist hangers
thanks