A 2x18 ladder is a heavy-duty, custom-built access ladder using 2-inch thick dimensional lumber (typically 2x10 or 2x12) as the side rails, extending to a length of 18 feet. This type of ladder is ideal for tall structures, scaffolding, or multi-level construction access where a longer reach is needed. Key Specifications: Side Rails (Stringers): 2x10 or 2x12 lumber, 18 feet long Rungs: Typically 2x4 or 2x6 lumber, spaced 12" apart on center Construction: Rungs are securely attached using screws or bolts, with possible reinforcement via dado joints or metal brackets Material: Can be built using pressure-treated lumber for outdoor use or standard framing lumber for indoor use Max Height Reach: Approximately 17–18 feet depending on angle of use Applications: Roof access, mezzanine entry, scaffold ladders, or temporary stairs