SL-Type HYDRAULIC OVERHEAD BEAM CRANES: The Sliding type Overhead Beam Crane is a compact multi-stage telescoping crane. It is designed to work independently as an aft tender garage crane, or to work in synchronized matched pairs to launch large tenders from a tender garage. The primary material of construction is aluminum to reduce the potential for corrosion and system weight. These cranes are available in a series of section heights: B7, B10, B12, B14, B18 {6.75%u201D %u2013 17.75%u201D / 172mm %u2013 450mm} The SWL Capacities of these cranes range from 1100-Lbs (500-Kg) to over 22,000-Lbs (10,000-Kgs). These compact designs permit the crane structure to nest into the vessel%u2019s overhead and live within the confines of the tender garage space.