The Stronghold ICF (FD) Folding Web Series blocks were developed because that’s what contractors want. The FD Series ICF Blocks uses folding webs that are easy to adjust. Foldable blocks means more blocks per truckload. They have removable provide nail hinge pins allow for the adjustment of central webs for placement through heavy rebar grids. a solid block and a solid wall for installation. The .25” thick outer fastening flanges are 1.5" wide and 16" tall for continuous fastening. Two horizontal center ties with tall rebar holders provide for secure rebar placement with bars up to a #8 or 25mm. The foam panels are 1.5 lb density, 2.75" thick, and 16" tall x 48" long. They are available in 6", 8", 10" & 12" sizes.