This book is written by Vincent T. H. CHU. Ir. Vincent T. H. CHU is the author of The Civil FAQ in the Hong Kong Engineer published by the Hong Kong Institution of Engineers and is famed as walking encyclopedia of civil engineering. Just winning The Ombudsman’s Awards 2007 in complaint-related category and Young Engineer of the Year 2008 (Merit), he developed great passion for civil engineering and always devoted himself completely in his leisure time to the study of civil engineering. He has regularly published articles in some engineering journals and is also the author of Civil Engineering Practical Notes A-Z. This is his second book in less than one year. He has established a free Civil FAQ email service called “Ask Vincent Chu” (email: [email protected]) in which he would answer civil engineering queries raised from engineers (especially young engineers).