[BC] Protecting the roof from ice.

[Dave Dunsmoor]

>I regularly see chain link fence mesh laid over rows of tires atop a roof.
>  The chain link intercepts the ice and tires absorb the impact force.

    That sounds like a good way to do it. I've seen other, more "engineered 
looking" methods, but the energy absorbing business of the tires is good.

    We don't get much clear ice forming here, mostly rime ice which looks 
feathery and white, and you might think it's "lightweight", but until you 
see it fall, hear it whistle through the air then FEEL it hit the ground 
(from some distance), it doesn't really "hit home" how solid it really is.

Dave Dunsmoor