NDS less than 4d edge distance

[gdubb08]

I'm looking for guidance on edge distance less than 4d when load is applied perpendicular to the grain of a timber member. All the NDS in C11.5 states is that they don't specifically address this issue.

 

[woodman88]

Do not do it.
If you do, you are stepping outside of the standard of practice for wood design per the building codes which reference the NDS as a standard.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

 

[SteelPE]

While I agree with woodman, I have seen plenty of engineers who have used "engineering judgment" to justify something.

One recent project comes to mind where the shear studs on a steal beam were only 1-1/2" above the steel decking. The engineer took a reduced capacity/stud and continued on. This was in clear violation of the AISC but the EOR bought off on his justification.

 

[Cadair]

If you do it, you are definitely outside the scope of the NDS and are on your own. If anything happens.....

That being said, if you need a number (for forensic engineering or something) the dowel bearing equations can give you something. I'd expect it to overestimate the capacity, but it is a starting point.

 

[msquared48]

I would just use a bucket connection, rather than a single bearing plate, and avoid the issue altogether.

Mike McCann
MMC Engineering

http://mmcengineering.tripod.com

 

[gdubb08]

This is all about what I expected to hear. I was hoping for some magic hidden footnote in the NDS that covered it, or something similar, but have found creative ways around it myself for years.


Thanks for the responses!