System Construction The main components of the Levolux Fin System are: First fix bracket, support arms, and support structure - in steel or extruded aluminium. Timber Fins - one-piece solid timber sections up to a maximum width of 300mm. Laminated, wider Fins can be produced following discussion. In all cases, the option exists to join Fins edge to edge to achieve large widths or to combine them with steel or aluminium creating a visually less dense construction. Walkway (optional) - extruded aluminium 'J'sections for maintenance. Controls (optional) - various types are available to provide manual,...