Limit Stops - CAESAR II - Reference Data

CAESAR II Applications Guide (2019 Service Pack 1)

PPMProduct
CAESAR II
PPMCategory_custom
Reference Data
Version_CAESAR
11.0 (2019)

Use the following guidelines when working with limit stops in CAESAR II:

  • Limit stops are single- or double-acting restraints whose line of action is along the axis of the pipe.

  • The plus or minus sign (+/-) on the single-directional restraint gives the direction of unlimited free movement.

  • A limit stop and a single-directional restraint can have gaps. The gap is the distance of permitted free movement along the restraining line of action.

  • A gap is a length and is always positive. The plus or minus sign (+/-) on the restraint determines the orientation of the gap along the line of action. The gap direction is opposite to the direction of free travel.

  • You can use connecting nodes (CNode) with any limit stop model.

  • A limit stop can be defined using the restraint type LIM.

  • Limit stops provide double- or single-acting support parallel to the pipe axis. Limit stops can have gaps and friction. The positive line of action of the limit stop is defined by the From and To node on the element.

  • CAESAR II computes direction cosines for orthogonal or skewed limit stops. The software ignores user-defined limit stop direction cosines.

Directional Limit Stop with a Gap

Two Limit Stops Acting in Opposite Directions

The stop at node 45 permits unlimited free movement in the positive X-direction and 1.0 inches of free movement in the negative X-direction before the limit stop becomes active.

The stop at node 195 permits unlimited free movement in the negative X-direction and 1.0 inches of free movement in the positive X-direction.