Ancon launches improved IHR Head Restraint Jul 23, 2018 | Articles, Building Industry News, Building Products & Structures, Concrete, Cement, Admixtures, Innovations & New Products, Posts, Steel and Structural Frames ANCON has re-engineered its IHR internal head restraint to accommodate gaps at the wall head of up to 75mm, extending the previous maximum of 50mm. Read More