Passtav,
I've broken loads of axes/mauls/sledgehammers. Generally either the shaft splits (which can be scary as hell) or the head snaps off. . .and a war axe is not a maul or a wood splitting axe, so I'd suspect it'd break more easily if used to chop solid wood, or if you used the back end to try and break a stone or metal door. They're meant to hit people, and people give. . .so the heads are thinner, sharper, and made of higher carbon, more brittle steel. (A sledgehammer or wood axe head is almost iron, it will deform, bend and/or mushroom before finally chipping, breaking or splitting.)
Jeff,
The RMC Spell Law has the RMSS spell law section on structural damage, then it also has an element by element, crit by crit breakdown of of effects on the environment.
It covers all the SL crit types. . .so it won't cover acid or nether, but it does do heat, cold, impact, electical, shock, lightning, ice, fire. . . .
Technically, no spell will affect gear on a person short of a specific crit result saying so (Aura protection rule). . .but if you fireball someone's tent, the rules in RMC spell law cover what burns and what doesn't.