Section Connectivity

When sections (GENSEC) are connected, the connection between the two sections is represented on the owning section as justification line datum (JLDATU), positioning line datum (PLDATU) and fixing (FIXING) elements in the Model Explorer.

In the structural hierarchy, JLDATU, PLDATU and FIXING elements are created each time an owning and attached section are connected. By default, the JLDATU, PLDATU and FIXING elements are deleted if a connected GENSEC is deleted.

Justification Line Datum (JLDATU)

JLDATU elements are owned by GENSEC elements. The JLDATU element contains the justification line datum for the connection. The justification line datum represents the connection distance measured from the start of the owning GENSEC. JLDATU elements are administrative and can own PLDATU elements.

Positioning Line Datum (PLDATU)

PLDATU elements are owned by JLDATU elements. By default, a PLDATU element is created for each connection. The PLDATU element contains the positioning line datum for the connection. The positioning line datum represents the Pline that the attached section is trimmed to. PLDATU elements are administrative and can own FIXING elements.

Fixing (FIXING)

FIXING elements are owned by PLDATU elements and have the same position as a PLDATU. FIXING elements contain properties for:

• Connectivity to the structural 3D model

• Trimming attached members

• Specification Reference (SPREF attribute) for the joint/fitting.