Disclosed is an apparatus for mounting equipment, such as solar panels, fans, air conditioning units, walkways, signage, facade, or ladders, on corrugated or ribbed metal roofs where the mounting apparatus attempts to provide a leak resistant and stable mounting structure for such equipment. The corrugated or ribbed metal roof includes one or more peak portions and one or more corresponding valley portions. The equipment-mounting apparatus engages the roof with one or more fasteners at least one peak portion and engages by valley portion through a transfer of force from the fastener at the peak portion without requiring additional fasteners to engage the valley portion.