The frame is made of hot-dip galvanized steel and the steps are made of wood.
Avoid galvanic corrosion of your bridge ladder/extension by mounting an anode on the metals to be protected. Stainless steel (both AISI 304 and 316) is unfortunately also exposed to galvanic corrosion. Then use axle anode Ø: 32 mm item no. 1143324 if you want to protect your paving ladder/extension.
