<b><b>Block strength </b></b><br> Topblock has recently released a new Topcrete Midi-Block specifically designed for applications requiring high strength and acoustic performance. Manufactured to BS 6073 and meeting the requirements of ISO 9002, Midi-Blocks are 140mm thick, with a 290mm long x 215mm high face. They may be used for standard 140mm walls, or 215mm walls when laid flat. Standard blocks weigh 17.3 kg per unit, and paint quality blocks are 16.4 kg. Key features include two and three hour fire ratings for load and non-load bearing walls respectively, and sound reduction measured at 50dB for a 140mm wall thickness. <p></p><p><b>Tarmac Topblock </b></p><p><b> EO772</b></p><p><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b><b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b></b><br></p>