certainly creative, if inefficient.

code/game/objects/structures/girders.dm

@@ -264,6 +264,14 @@
 		var/atom/movable/mover = caller
 		. = . || mover.checkpass(PASSGRILLE)
 
+/obj/structure/girder/attack_animal(mob/living/simple_animal/M)
+	if(M.environment_smash)
+		if(state != GIRDER_DISPLACED)
+			var/obj/structure/girder/displaced/D = new (loc)
+			transfer_fingerprints_to(D)
+		qdel(src)
+
+
 /obj/structure/girder/blob_act(obj/effect/blob/B)
 	if(prob(40))
 		qdel(src)