Abstract
The technology of precast reinforced concrete structural system are on a big turning point. Sustainable developments with less environmental impact and consuming less natural resources are an apparent requirement of our society in the twenty first century. Requirement to producing building structures of low-cost, high-quality and high durability emerges as well as the traditional issue of seismic safety. The precast concrete technology may be enable us to solve these issues by developments of new seismic precast concrete structural systems. This paper reports the state-of-the-practice of precast concrete focusing on the recent development of new structural regulations for precast concrete structural systems in Japan and some other countres in high seismic zones induding New Zealand and the US.
