Gypsum Board Ceiling Control Joints

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Gypsum board ceiling control joints.

4 7 3 7 control joints shall be installed where specified by the architect or designer as a design accent or architectural feature. The parameters for placement of control joints are specified in astm c840 standard specification for application and finishing of gypsum board. Gypsumation provides essential gypsum board information to a e c professionals contractors and code officials twice annually. Supplement to construction dimensions magazine.

Drywall control joints or gypsum board expansion joints are used to control cracking in gypsum board ceilings walls. Control joints does not exceed 900 sq ft 84 m o section 20 3 5 ga 4 7 3 5 control joints in exterior ceilings and soffits shall be installed so that linear dimensions between control joints do not exceed 30 ft 9100 mm and total area between control joints does not exceed 900 sq ft 84 m. 4 7 3 control joints in the gypsum panel products shall be specified by the architect or designer where any of the conditions described in sections 4 7 3 1 through 4 7 3 7 exist. This article discusses expansion contraction of drywall gypsum board and the drywall control joint or expansion joint products used to prevent these problems in building interiors.

With perimeter relief the maximum recommended control joint spacing is 50 feet. We cite drywall expansion joint installation specifications applicable construction. A control joint shall be installed where a partition wall or ceiling traverses a construction joint expansion seismic or building control element in the base building structure i do not think. Drywall or veneer plaster control joint clarkdietrich 093 zinc control joint is applied between abutting gypsum panels and is used to relieve stresses of expansion and contraction of drywall and veneer plaster systems in large ceiling and wall expanses over 30 in length.