作者介紹 Lawrence K. Shapiro, P.E., is a principal of Howard I. Shapiro & Associates. A participant on national and international committees for writing crane standards, his field of practice includes tower and mobile crane installation design, scaffolding, shoring, forensic engineering, and construction planning. Jay P. Shapiro, P.E., is a principal of Howard I. Shapiro & Associates, an engineering consulting firm. He has designed installations for mobile and tower cranes as well as derricks, primarily in New York City. Mr. Shapiro has been a member of the New York City Crane Advisory Council revising the NYC Building Code Reference Standard for Cranes & Derricks. His practice includes design of rigging for heavy lifts, travel of heavy equipment through buildings, shoring, and procedures for building demolition.