Patent ID: 7823364
Filing Date: 2010-11-02
Classification: E04C,E04D

Abstract:
1. A method for constructing a fire-resistant and shear-resistant diaphragm on the floor or roof of a building comprising: positioning a first rectangular shear panel on a first set of at least three beams, the first shear panel having a width selected to correspond to a multiple of a center-to-center spacing of the beams, the first shear panel comprising a layer of fire-resistant cementitious board having an exposed first surface and having a second surface bonded to a layer of high-strength material, the layer of fire-resistant cementitious board having a first length between a respective first edge and a respective second edge, the layer of high-strength material having a second length between a respective first edge and a respective second edge, the second length of the layer of high-strength material greater than the first length of the fire-resistant cementitious board, the respective second edge of the layer of high-strength material extending beyond the respective second edge of the layer of fire resistant cementitious board to form a tab in the same plane as the high-strength material; positioning a second rectangular shear panel substantially identical to the first rectangular shear panel on a second set of at least three beams, at least two beams of the second set of beams being in the first set of beams, at least an overlapping portion of the second shear panel proximate the first edge of the second shear panel being positioned on the tab of the first shear panel; securing the first shear panel to the first set of beams with the second edge of the first shear panel generally perpendicular to the each beam of the first set of beams; securing the second shear panel to the second set of beams; and securing the overlapping portion of the second shear panel to the tab of the first shear panel between the at least two of the beams of the second set of beams that are also in the first set of beams.