Lawson, R. M. Design for openings in the webs of composite beams / R. M. Lawson. - Ascot, Berks: Steel Construction Institute, [1985] - 44p. - SCI publication; 068 CIRIA special publication; 51 . ISBN: 086017283x LCCN: 90012033 Subjects--Topical Terms: Composite construction.Slabs.