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Room Height
According to the SIS standard, a space should have a room height of at least
1.90 meter with a width of at least 0.6 meter to be counted as measurable area.
The SIS calculation standard delivered with this software is automatically
checking the height of each space to make sure the space height conditions
are met. Otherwise, the boundaries for Net area (NTA) and Usable Area (BRA)
are offset according to the SIS standard rules.
The room height rule is applied only to associative 3D freeform spaces. For
extruded 3D spaces the user-defined space height is used uniformly on the
space.
NOTE The calculation of the room height for SIS is new to AutoCAD Architecture
2011. In previous versions the room height was not automatically calculated for
the SIS standard. If you have legacy drawings from earlier versions, SIS-calculated
spaces might change their boundaries when opening the drawing in AutoCAD
Architecture 2011.
Net Area (NTA)
The following rules apply to the generation of net boundaries with the SIS
standard:
â– The net boundaries are measured to the inside of the wall.
3172 | Chapter 39 Spaces
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