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3.5.1.5 Support

Supports are those restraints which rigidly resist only the downward movement of the pipe, with the point of attachment below the pipe, that is, either with the pipe resting on a structure, or with an intervening saddle or trunnion. Typical supports are shown in Figure 3-99. These are coded in CAESAR II as +Y restraints, indicating that the restraint acts in the +Y direction against the pipe. Under certain circumstances, it may be desirable to model the trunnion or saddle with a rigid construction element (in order to consider the offset of the friction load, for example). Since the pipe slides against the structure, friction should be modeled (unless a roller, as in Figure 3-99f, or a teflon slide pad, is used).

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Modeling And Analysis Of The Piping System

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