Formply 17 is structural plywood, specifically a 17mm thick plywood sheet designed for concrete formwork, often referred to as "F17 Formply" - meaning it has a stress grade rating of F17, indicating a high load-bearing capacity and making it suitable for demanding construction applications like walls, suspended decks, and columns; it is typically made with mixed-species veneers and a phenolic overlay for durability and moisture resistance.
Formply 14 is structural plywood, specifically a grade of formply with a "F14" rating, meaning it can withstand a pressure of 14 megapascals (MPa) and is primarily used for concrete formwork due to its high moisture resistance and durability provided by a phenolic resin-impregnated paper overlay; essentially, it's a strong, reusable plywood sheet designed to create molds for pouring concrete.