install blocking behind the joints in the panels) as described in the tested system. If a shear wall or diaphragm ceiling is being built, back-block the joints (i.e. If one moves beyond the basic rules and works with a fire or sound test, make sure that the joints are staggered in accordance with the requirements of the test. To sum up: Don't line up end joints on one side of a wall don't allow joints to occur on both faces of the same stud and don't force panels together so that the panel edges are stressed. Also, base layer joints should not line up on opposite sides of a stud. In a multi-layer system, panels must be installed so that end joints on the same side of the partition are staggered between alternate courses. A checkerboard pattern is not wanted strive for a staggered pattern. where the non-tapered ends of panels abut) should be staggered between alternate courses and end joints should not line up with joints on the opposite side of the wall. In a single-layer system, panels must be installed so that end joints don't line up.Joints on the opposite sides of a partition must not occur on the same stud.Panels are to be abutted so that they contact each other but they are not to be forced together.
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