soffit
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soffit
Also called: obvert
Standards
the highest point of the internal surface of a pipe or culvert at any cross-section. The term ‘obvert’ is also used
Source - AS/NZS 3500.0:2003: Plumbing and drainage
HB50
<surface> exposed horizontal or sloping under-surface of any form of construction works
HB50
<pipe> highest point of the internal surface of a pipe or culvert at any cross-section