This allows a 'construction stage' to be defined using analysis stages for the times specified (in days). The dialog reports the earliest and latest dates defined in the members. A stage is created including the members that are active at the time specified.
When considering the construction stages of a model, particularly when creep and shrinkage are a concern it is useful to be able to assign a timeline to a member or set of members. This is not used directly by GSA at present.
A timeline for members can be defined to determine the presence or absence of elements for the duration of the project