Through bolt in wood

[awa5114]

Is a through bolt (5/8") technically a dowel-type fastener? Meaning can we use Chapter 11 of the 2012 NDS to calculate shear/withdrawal capacities for it? Im talking about something like this:

 

[wannabeSE]

Can't you open the book and look. If you have a specific question, someone may be able to help.

 

[awa5114]

Yes, I opened the book but wasn't sure. What more details do you need?

 

[mike20793]

The NDS notes that dowel-type fasteners are bolts, lag screws, wood screws, nails, spikes, drift bolts, and drift pins. Furthermore, the definition for a wood dowel is a pin fitting into a hole in an abutting piece to prevent motion or slipping. So yes, that is a dowel-type fastener.

 

[awa5114]

Great, thanks Mike.

 

[wannabeSE]

I'd like to apologize for my snarky response and add a little more information about the bolted connection design.

Chapter 11, Mechanical Connections, may have some requirements that need to be considered.
Chapter 12, Dowel-Type Fasteners, has detailing requirements and covers the lateral (shear) design
For tension, the bolt strength typically doesn't govern but should be checked (often times OK by inspection). The bearing perpendicular to grain needs to be checked per chapter 3, Design Provisions and Equations, along with the material chapter (EG chapter 4 for sawn lumber, chapter 5 for glulams etc). The area of the washer is used as the bearing area, don't count the bolt-hole in the washer in the bearing area.

 

[mike20793]

Thanks for adding. That's some good info.

 

[awa5114]

No problem. My question could have been more specific. Thanks for the additional info.