The first period happens for many girls between the ages of 12 to 14 years, but quite often it is earlier (from as early as 9 years old) or later (up to 16 years). Girls start having periods at different times depending on how quickly they are developing.
IFC (Issued for construction) means that the drawings and specifications have been approved by the local governing agencies and that these are the plans by which the project will be constructed. Shop drawing is a drawing or set of drawings produced by the contractor, supplier, manufacturer, subcontractor, or fabricator.
Wiring Diagram. A wiring diagram is sometimes helpful to illustrate how a schematic can be realized in a prototype or production environment. A proper wiring diagram will be labeled and show connections in a way that prevents confusion about how connections are made. Typically they are designed for end-users or installers.