The Structural Engineer > Archive > Volume 66 (1988) > Issues > Issue 13 > Sandwich Panels as an Efficient Form of Protection Against Dropped Objected
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Sandwich Panels as an Efficient Form of Protection Against Dropped Objected

Norwegian legislation requires that sensitive areas of offshore oil platforms are protected against accidentally dropped objects. Typical of these is a drill collar weighing as much as 3.5t and dropped from 15 m. Conventional design against such an event usually involves stiffened steel plate of large thickness, of high strength material or special quality steel, such as armour plating, and is therefore very costly. An alternative method of design and construction is described here, which is of sandwich form and uses ordinary mild steel enclosing a softwood infill. A simple design procedure is described which has been validated by both model- and full-scale tests. A.D. Gandekar, A.L. Yettram and W.A. Fletcher