Aluminium alloy and steel.

- Aluminium part : Aluminium by maker's practice.
- Steel part : Hot dip galvanized or painted.

Ladder system consists of ladder body, lower platform, upper platform with turntable, davit, post and rest for stowing, winch with motor, and all accessories as shown in each typical assembly plan.

1. Normal inclination of ladder : 55 degrees to horizontal.
2. Standard breadth of ladder : 600mm.
3. Joint parts : main body by argon-arc welding and partly by stainless bolt and
     nut or aluminium rivet.
4. Insulation sheets are inserted between all aluminium and steel contacts.