# Center of Gravity

## Center of gravity

The "Center of gravity" function can calculate the center of gravity for an entire wall. All volumes of the selected layers are taken into account.

The center of gravity is indicated by a circle with a cross. If the center of gravity is not visible, the dimensioning elements for walls are turned off in the display dialog (File - Settings - Display).

The center of gravity is also shown on the wall plan. To allow it to be toggled there, it is placed on its own layer. In addition, the wall plan legend shows the wall weight and the layers considered.

This center of gravity can be used to determine hanging points. It is important that the hook always hangs vertically above the center of gravity, regardless of the length of the individual chain.

## Center of gravity, automatic suspension

**Priority of deviation:** When determining the suspension points in the center-of-gravity function, the software first tries to find solutions without deviating from the traverse attachment points (AP) or from the center of gravity (SW). If this is not possible, it currently first attempts to deviate from the traverse attachment points (AP); the chains or straps then no longer hang vertically. Only if this also fails will it attempt to deviate from the center of gravity (SW); thus maintaining the center of gravity has higher priority. With the selection *Priority* this order can be reversed so that the software first attempts to deviate from the center of gravity (SW) and only if that fails deviates from the attachment points (AP).

For the suspension, frames are searched. The following member types are considered: 622, 632, 311 - 318, 641. For member type 622 the Z coordinate of the body coordinate system must be parallel to global XoY (i.e., horizontal). This excludes vertically oriented frames.

**Point input:** In this function the suspension points are normally determined automatically and passed to the combined element. If other suspension points are desired, one or two suspension points can be entered after invoking the "Point input" button.

▪ The points may be located anywhere; only their X position is used.

▪ At the entered X position, the program then determines the components for the suspension and, on those components, the upper and lower points for the operations.

▪ Components and points are then passed to the combined element as with automatic search.

This allows the combined elements for the suspension construction to be used also for points that were not determined automatically.
