Structurally unsound, loose, dangerous, crumbling, missing, broken,
rotted or unsafe exterior portions of buildings or structures, including
but not limited to porches, landings, balconies, stairways, handrails,
steps, walls, overhangs, roofs, gutters, downspouts, wires, cables,
fences, supporting members, timbers, abutments, fire escapes, signs,
bricks, stones, mortar or plaster.