Open to Below; Open to Above
Introduction
Once and for all, open to below, open to above… What are the graphics?
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Graphics & Standards Notes
Open to Below
As open to below is showing something in plan that is encompassed within the view range, the opening is drawn by a solid line. If you think about this for a floor plan, the edge of the floor or element ‘should’ be shown with a solid line. This is the easy way to remember that open to below spaces are encompassed by a solid line.
Typically drawing an X from the further most points that you can, this “X” normally being either thinner, or lighter colored, potentially both for your plans. For L-shaped or awkward polygon spaces, it's common to include multiple X’s that fully encompass the area. This will be true for open atrium spaces below, shafts, chases, and other similar spaces.
- Depending on the drawing, in MEP shafts and chases, it may be common to show the ductwork and pipes rather than the opening.