ASTM C956Full Name ASTM C956 – Standard Specification for Installation of Cast-In-Place Reinforced Gypsum ConcreteScope This specification covers the minimum requirements for the installation of cast-in-place reinforced gypsum concrete over permanent formboard.Keywords calculation of diaphragm shear; gypsum concrete; gypsum roof deckResourcesASTM International Website: ASTM C956 Need more info?