Prestressed Plank is produced in varying thicknesses to meet project requirements. A 3½" Plank is the recommended minimum with ½" strand, although 3" has been used. The 4" Plank is the most common thickness and should be used for smaller projects and for “infill” areas where other products may not suit. Plank widths are tailored to suit project requirements with 10ft being typical. GPRM Prestress will provide the most economical layout width on our shop drawings. When a thickness over 4” is required, other products should also be considered.