Axial Movement
Lateral Movement
Lateral Deflection is the relative displacement of the two ends of an Expansion Joint perpendicular to its longitudinal axis.
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Angular Movement
Angular Rotation is the displacement of the longitudinal axis of the Expansion Joint from its initial straight line position into a circular arc.
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Concurrent Movements
Concurrent movements are developed when two or more movements in a pipe system occur at the same time.
If multiple movements exceed single arch design there may be a need for additional arches.
To perform calculation for concurrent movement when a pipe system design has more than one movement, please use the following formula:
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Actual Axial Compression + Actual Axial Extension + Actual Lateral (X) + Actual Lateral (Y) = / <1
Rated Axial Compression + Rated Axial Extension + Rated Lateral (X) + Rated Lateral (Y)
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Calculation must be equal to or less than 1 for expansion joint to operate within concurrent movement capability.