Snow Load - Sliding Snow
Snow Load - Sliding Snow
(OP)
In ASCE 7-10 it states that sliding snow does not need to be taken in combination with drift, unbalanced or partial snow loads. This seems counterintuitive. Can anyone provide some insight on where this comes from?
It seems like you could have drift and sliding snow, no?
It seems like you could have drift and sliding snow, no?
RE: Snow Load - Sliding Snow
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Snow Load - Sliding Snow
I would think in certain situations, where the roof height differential is substantial, you would want to combine the two effects. At worst its conservative versus the code, so it shouldnt be a problem.
A source you could try for an answer is the snow load guide ASCE publishes. I think you can even email the author of the guide (roark? I think he wrote the majority of the code too) for questions.
RE: Snow Load - Sliding Snow
After thinking about it there probably is some engineering judgment that needs to take place...imagine that.
I may try to reach out to O'Rourke. I post back if I do.
Thanks,
EIT
www.HowToEngineer.com
RE: Snow Load - Sliding Snow
RE: Snow Load - Sliding Snow
In general, should different snow loads be combined in general? For instance, should drift loads be applied with partial loading? Or should they be considered separate cases?
- Aaron
RE: Snow Load - Sliding Snow
Also note that when combining snow with wind and live or EQ and live, you would only use the 'flat/normal' roof snow load.
EIT
www.HowToEngineer.com
RE: Snow Load - Sliding Snow
EIT
www.HowToEngineer.com
RE: Snow Load - Sliding Snow
RE: Snow Load - Sliding Snow
I will try to make a scan of the figure (don't tell IBC :) ).
EIT
www.HowToEngineer.com