Wind Loading to National Building Code of Canada 2015

[EMO2012]

Hello respected colleagues and gentlemen,
I was trained in the British system of education and had practised Structural Engineering with BS Codes all my life. I am now transitioning into the Canadian Code.

I will like to get help with calculation of "net external pressure coefficient"

Every other associated matter is clear.

Thanks

 

[jayrod12]

Components and Cladding design or Main Wind Force Resisting System?

 

[atrizzy]

Do you have a copy of the NRC commentary on Part 4 of the NBCC? Very very helpful in all things wind-design.
I'd be surprised if that document didn't clear things up for you.

 

[pmtpemb]

Commentaries for nbcc 2015 are not yet available

 

[jayrod12]

Commentaries are included in the 2015 code. No separate book this time
Thank god

 

[dik]

I don't know of any jurisdictions that have adopted the NBCC 2015... most are still using the 2010...

Dik

 

[jayrod12]

Dik, I was under the impression we (MB) are the last to get on board with it. And from what I hear it's truly imminent.

 

[pmtpemb]

Saskatchewan and nova scotia adopted it but then pulled back to nbcc 2010 as everyone is waiting on the commentaries.

 

[dik]

pmtpemb... that's what I had understood...

Dik

 

[jayrod12]

What sections of the old commentaries aren't included in the new code. All of the snow and wind stuff is part of the new code directly.

 

[atrizzy]

To more directly answer OP's question, you need to follow the flow chart given in figure I-1 of the wind section of the commentary. Depending on what you're designing (high-rise, cladding, low rise) you have different procedures to follow.

For most situations there are tables providing combined CpCg factors.

 

[EMO2012]

Thanks, distinguished colleagues. I combed the internet to find bits and pieces of the commentaries. I might have to buy one. Or is anyone willing to trade?

Thanks

 

[jayrod12]

Trying using jabacus.com

It will do most of the simple cases. But not highrises.