초록 ▼

A shear panel for constructing underlayments for floors and roofs of buildings includes a first rectangular layer of fire-resistant material, such as cementitious board, bonded to a second rectangular layer of thin high-strength material, such as galvanized steel. The length of the second layer is l

A shear panel for constructing underlayments for floors and roofs of buildings includes a first rectangular layer of fire-resistant material, such as cementitious board, bonded to a second rectangular layer of thin high-strength material, such as galvanized steel. The length of the second layer is longer than the length of the first layer. The additional length of the second layer forms a tab extending from one end of the panel. During construction, a first panel is attached to a set of beams (floor joists or roof rafters) with the tab spanning between adjacent beams. A second panel is positioned on the beams with at least a portion of the second panel overlapping the tab of the first panel. The overlapping portion of the second panel is fastened to the tab of the first panel to form a continuous shear diaphragm for the floor or roof.

대표청구항 ▼

What is claimed is: 1. A shear panel for floors and roofs comprising: a first layer comprising a generally planar fire-resistant cementitious board having an exposed first surface and a second surface, the first surface and the second surface of the cementitious board having a generally rectangular

What is claimed is: 1. A shear panel for floors and roofs comprising: a first layer comprising a generally planar fire-resistant cementitious board having an exposed first surface and a second surface, the first surface and the second surface of the cementitious board having a generally rectangular shape defined by a first width between a first edge and a second edge of the second surface and a first length defined between a third edge and a fourth edge of the second surface, each of the first surface and the second surface being uniformly substantially flat and being uniformly substantially parallel with each other; a second layer of high-strength backing material, the backing material having a generally rectangular shape and being uniformly substantially flat in a backing material plane, the rectangular shape defined by a second width between a respective first edge and a respective second edge of the second layer and a second length defined between a respective third edge and a respective fourth edge of the second layer, the second width of the second layer being approximately equal to the first width of the first layer, the second length of the second layer being greater than the first length of the first layer by a selected distance, the first edge of the second layer aligned with the first edge of the first layer, the second edge of the second layer aligned with the second edge of the first layer, the third edge of the second layer aligned with the third edge of the first layer, and the fourth edge of the second layer displaced from the fourth edge of the second layer by the selected distance to form a tab in the same plane as the backing material that extends from the fourth edge of the second layer in the backing material plane such that the second layer including the tab is uniformly substantially flat; and a bonding layer interposed between the second surface of the first layer and the second layer to secure the second layer to the first layer. 2. The shear panel as defined in claim 1, wherein the backing material comprises metal. 3. The shear panel as defined in claim 1, wherein the backing material comprises galvanized steel. 4. The shear panel as defined in claim 1, wherein the fire-resistant cementitious board has a thickness in a range from approximately 0.5 inch to approximately 1.0 inch. 5. The shear panel as defined in claim 1, wherein the fire-resistant cementitious board has a rectangular shape and has a width of approximately four feet. 6. The shear panel as defined in claim 1, wherein the fire-resistant cementitious board is square with a width of approximately four feet and a length of approximately four feet. 7. The shear panel as defined in claim 1, wherein the selected distance is in a range of approximately 1 inch to 2 inches. 8. A shear panel for floors and roofs comprising: a generally rectangular first layer comprising a fire-resistant cementitious board, the first layer having a first width between respective first and second edges and having a first length between respective third and fourth edges, the first layer having an exposed first surface and a second surface, the first surface and the second surface each being uniformly substantially flat, the first surface being substantially parallel to the second surface; and a generally rectangular second layer bonded to the second surface of the first layer, the second layer comprising a high-strength backing material, which is uniformly substantially flat in a backing material plane, the second layer having a second width between respective first and second edges and having a second length between respective third and fourth edges, the second width being approximately the same as the first width and the second length being greater than the first length by a tab length, the backing material being positioned on the first layer with the respective first edges aligned, with the respective second edges aligned, with the respective third edges aligned, and with the fourth edge of the second layer displaced from the fourth edge of the first layer by the tab length to form a tab in the same plane as the backing material that extends from the fourth edge of the second layer in the backing material plane such that the second layer including the tab is uniformly substantially flat. 9. A method of forming a laminated shear panel for constructing floors and roofs of a building comprising: forming a first layer of a fire-resistant cementitious board into a first generally rectangular shape having a first width between a respective first edge and a respective second edge and having a first length between a respective third edge and a respective fourth edge, the first layer having an exposed first surface and a second surface, each of the first surface and the second surface being uniformly substantially flat, the second surface parallel to the second surface and spaced apart from the first surface by a uniform thickness of the first layer; forming a second layer of a high-strength material into a second generally rectangular shape, the second layer being uniformly substantially flat and lying in a second layer plane, the second layer having a second width between a respective first edge and a respective second edge and having a second length between a respective third edge and a respective fourth edge, the second width being formed to be approximately the same as the first width, the second length being formed to be greater than the first length by a tab length; aligning the first edge of the second layer with the first edge of the first layer and aligning the second edge of the second layer with the second edge of the first layer; aligning the third edge of the second layer with the third edge of the first layer to cause the fourth edge of the second layer to be displaced from the fourth edge of the first layer by the tab length to form a tab in the same plane as the second layer of high-strength material such that the second layer including the tab is uniformly substantially flat; and bonding the second layer to the second surface of the first layer.