Design of castellated beams for use with BS 5950 and BS 449 The Steel Construction Institute, 1985 ISBN 0 86200 039 4, 54 pages, 21 figures, A4 paperback Provides the designer with design methods, safe load tables, and interaction curves to enable suitable castellated beam sizes to be selected and analysed. Ultimate capacities are included suitable for designs to limit state concepts, as given. About Technical Advisory Service Design Service & Software Free Beam Design Service Cellular Beam Software Cellvibe Software BIM/Revit Information.