Scale: 1:1. A model depicting a section of a girder, or beam, part of the frame of a vessel. Made entirely from unknown metal, it shows a cross section of the girder, one end with a flat t-shaped shoulder with an enlarged shoulder joint which then runs into the parallel section, and finishes with a rounded bulbous end. The side of the section are painted black.

One of a set of three models: see SLR2320 and SLR2328.