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A expansion joint, or movement joint, is an assembly designed to hold parts together while safely absorbing temperature-induced expansion and contraction of building materials. They are commonly found between sections of buildings , bridges , sidewalks , railway tracks , piping systems , ships , and other structures.
U.S. Bellows, Inc. provides a variety of expansion joints for piping and duct systems [2] and has been a member of the Expansion Joint Manufacturers Association, Inc. since 2002. [3] In December 2011, U.S. Bellows acquired all bellows assets of the former Lortz Manufacturing companies, doubling its manufacturing capabilities. [4]
The standards are a combination of a variety of expansion joint manufacturers' knowledge and experience. [2] [3] The EJMA organization performs extensive technical research on a variety of topics concerning the design and manufacturing of expansion joints. [4] This knowledge contributes to providing new versions of the EJMA book of standards.
With braced timber-framed structures clay plaster was used on interior walls and ceilings as well as exterior walls as the wall cavity and exterior cladding isolated the clay plaster from moisture penetration. Application of clay plaster in brick structures risked water penetration from failed mortar joints on the exterior brick walls.
Stucco used as an exterior coating on a residential building. Rock dash stucco used as an exterior coating on a house on Canada's west coast. The chips of quartz, stone, and colored glass measure approx. 3–6 mm (1/8–1/4"). The basic composition of stucco is lime, water, and sand. [4]
Cement board has very little movement under thermal stress, but the boards are usually installed with a slight gap at joints in shower pans, bathtubs, and each other. These joints are then filled with silicone sealant or the manufacturer's taping compounds before applying a finish. The filled joints are taped like conventional gypsum board, but ...
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