What is the difference between pre-galvanized and hot-dip galvanized cable ladder?

Pre-galvanized steel is galvanized before fabrication, usually from coated steel coil or sheet. Hot-dip galvanized after fabrication means the formed ladder components are galvanized after manufacturing. Hot-dip galvanized after fabrication can provide thicker coating coverage, but specifications may require inspection and removal of excess zinc or sharp zinc build-up to prevent cable damage or installer injury.