Classification

IfcChimney

Namespace URI

http://identifier.buildingsmart.org/uri/buildingsmart/ifc-4.3/class/IfcChimney

Domain

IFC

Domain version

4.3

Domain state

Preview

Parent classification

Description

Chimneys are typically vertical, or as near as vertical, parts of the construction of a building and part of the building fabric. Often constructed by pre-cast or insitu concrete, today seldom by bricks.{ .extDef}NOTE Definition according to ISO 6707-1: construction containing one or more flues. Flue: Duct designed to convey the products of combustion to the open air. Chimney stack: Part of the chimney that projects above a roof. HISTORY New entity in IFC4.

Properties

Date erected.

Production date (stripped from form).

Defines a unique location within a structure, the ‘slot’ into which the piece was installed. Where pieces share the same piece mark, they can be interchanged. The value is only known after erection.

Enumeration defining where the assembly is intended to take place, either in a factory, other offsite location or on the building site.

The angle, in radians, by which the formwork at the ending face of a piece is to be rotated from the vertical in order to compensate for the rotation of the face that will occur once the piece is stripped from its form, inducing camber due to eccentric prestressing.

The angle, in radians, by which the formwork at the starting face of a piece is to be rotated from the vertical in order to compensate for the rotation of the face that will occur once the piece is stripped from its form, inducing camber due to eccentric prestressing.

The camber deflection, measured from the midpoint of a cambered face of a piece to the midpoint of the chord joining the ends of the same face, as shown in the figure below, divided by the original (nominal) straight length of the face of the piece.

The method of casting the concrete into its designed form.

The protective concrete cover at the reinforcing bars according to local building regulations.

The protective concrete cover at the reinforcement links according to local building regulations.

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