The 2015 Annual Conference of IPHA took place in Perugia, Italy from May 28 to 31. IPHA is the International Prestressed Hollowcore Association and is an Association dedicated to this special field of precast prestressed floors and walls. Its history goes back over 40 years and brings together a wealth of experience in the design, development, production and marketing of hollowcore constructions. It justifiably deserves its reputation as a centre of excellence for anyone involved in the industry and for designers of all disciplines. Membership of IPHA is open to manufacturers of hollowcore and also suppliers of equipment, principal material suppliers, specialised software designers and other relevant service providers. The current membership comprises 78 companies from 33 different countries from across the globe.