International Prestressed Hollowcore Association

The 16th Annual Conference of IPHA – Oslo, Norway 7th – 10th May 2011. Spiroll is pleased to promote the International Prestressed Hollowcore Association. IPHA brings together over forty years of experience in the design, development, production, sales and marketing of Prestressed Hollowcore Flooring. The Association was originally started as ISPA (International Spiroll Producers Association) in 1969 by […]