This Architectural Drawing is AutoCAD 2d drawings of Expansion joint detail of roofdeck in AutoCAD , dwg files. An expansion joint cover is what you see on a roof, and it allows the roof membrane to expand and contract in sync with the roof deck, without compromising the roof system. Roof expansion joint covers are typically just called “expansion joints”. Expansion joints are separations between structures, simply gaps, to allow them to move and reduce stresses that may occur. Often, these gaps are filled with an Expansion Joint System to fill in the void to ensure walkability, a complete building enclosure, waterproofing, and general serviceability of the structure. For more details and information download the drawing file.