Sizes 120 mm X 120 mm X 56810 mm 150 mm X 150 mm X 56810 mm BASE Plate for typical tie bar application with wing nuts and tie rods. Reinforced design, made from steel. Base Plates are for use both with timber and steel framework. Base Plates are of square dimensions of 120 x 120 mm, an opening hole to pass through tie rods and additional mailing holes for timber framework if required.