Canadian Code - Part 9 Snow Drift Loading
Canadian Code - Part 9 Snow Drift Loading
(OP)
Hello All,
In CBC 2005 / AlbertaBC 2006 I cannot find any provisions for snow drift loading, or any clause telling you to go over to Part 4 loading (besides 9.4.2.2 (3) - Bow string, arch, or semi circular roof trusses ... (use) Subsection 4.1.6)
Is this an oversight on the part of NRC? With some of the 'interesting' hip-valley roofs I've been seeing in residential, drifting should be a concern.
Thoughts?
In CBC 2005 / AlbertaBC 2006 I cannot find any provisions for snow drift loading, or any clause telling you to go over to Part 4 loading (besides 9.4.2.2 (3) - Bow string, arch, or semi circular roof trusses ... (use) Subsection 4.1.6)
Is this an oversight on the part of NRC? With some of the 'interesting' hip-valley roofs I've been seeing in residential, drifting should be a concern.
Thoughts?






RE: Canadian Code - Part 9 Snow Drift Loading
RE: Canadian Code - Part 9 Snow Drift Loading
Great spirits have always encountered violent opposition from mediocre minds - Albert Einstein
RE: Canadian Code - Part 9 Snow Drift Loading
BA
RE: Canadian Code - Part 9 Snow Drift Loading
Not sure how I missed that. Was just looking for backup in a disagreement with a truss supplier's design when I gave loading done by Part 4 - and this is exactly what I needed.
RE: Canadian Code - Part 9 Snow Drift Loading
RE: Canadian Code - Part 9 Snow Drift Loading
RE: Canadian Code - Part 9 Snow Drift Loading
9.4.2.5 Roofs at Different Levels
If roofs are at different levels, or there are projections above the roof level, the design roof snow load shall include allowance for the effects of drifting snow in accordance with Part 4.
BA
RE: Canadian Code - Part 9 Snow Drift Loading
RE: Canadian Code - Part 9 Snow Drift Loading
Unfortunately Alberta hasn't issued anything bringing provincial code up to 2010 NBC standards. There are various issues with the new energy efficiency requirements that everyone is fighting over.
RE: Canadian Code - Part 9 Snow Drift Loading
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Canadian Code - Part 9 Snow Drift Loading
I was talking with Diana McQueen a month or so ago and she made it sound like it was further off than that.
RE: Canadian Code - Part 9 Snow Drift Loading
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Canadian Code - Part 9 Snow Drift Loading
BA