Deck Parameter Reference

Decks are always extruded between their slices.

Parameter Description	Content Parameter	Parametric Value	InfraWorks Set/Read	Inventor	Revit
Has haunches	HasHaunches	Specifies whether or not the deck contains haunches. Either True or False.	No	No	Not applicable
Has middle haunch with no straddling taper	HasMiddleHaunchWithNoStraddlingTaper	Specifies the deck has an alignment straddling middle haunch that is not included as one of the specified MaxHaunches.	Yes/No	No	Not applicable
Inner haunch width	InnerHaunchWidth	The maximum top width of all the inner and middle girders.	No/Yes	No	Not applicable
Interior left girder offset	InteriorLeftGirderOffset	Lateral offsets of the interior left girders in right to left order (InteriorLeftGirder1Offset is for the innermost left girder). The parameter is named sequentially in the position of the name. Out of sequence parameters will be ignored.	No/Yes	No	Not applicable
Interior right girder offset	InteriorRightGirderOffset	Lateral offsets of the interior left girders in left to right order (InteriorRightGirder1Offset is for the innermost right girder). The parameter is named sequentially in the position of the name. Out of sequence parameters will be ignored.	No/Yes	No	Not applicable
Left deck slope in percentage	LeftDeckSlopeInPercentage	The lateral slope of the road underside to the left of the alignment.	No/Yes	No	Not applicable
Left most girder offset	LeftMostGirderOffset	The lateral offset of leftmost girder.	No/Yes	No	Not applicable
* Left width from center	LeftWidth	The distance from the deck alignment to the left edge of the road.	No/Yes	No	Not applicable
Max haunches	MaxHaunches	The maximum number of haunches allowed for the deck. This quantity excludes a middle haunch.	Yes/No	No	Not applicable
Mid haunch offsets from crown	MidHaunchOffsetsFromCrown	Lateral offset of the middle girder (if any).	No/Yes	No	Not applicable
Number of left girders	NumberOfLeftGirders	The number of interior and exterior left girders in the deck span.	No/Yes	No	Not applicable
Number of right girders	NumberOfRightGirders	The number of interior and exterior right girders in the deck span.	No/Yes	No	Not applicable
Outer haunch width	OuterHaunchWidth	The maximum top width of all the outer girders	No/Yes	No	Not applicable
Right deck slope in percentage	RightDeckSlopeInPercentage	The lateral slope of the road underside to the right of the alignment.	No/Yes	No	Not applicable
Right most girder offset	RightMostGirderOffset	The lateral offset of rightmost girder.	No/Yes	No	Not applicable
* Right width from center	RightWidth	The distance from the deck alignment to the right edge of the road.	No/Yes	No	Not applicable

Note: The single asterisk "*" indicates that a parameter is a geometry parameter that is required, and has been marked as a 'key' parameter in Autodesk Inventor.

Deck Placement

Deck origins are defined by both lateral and vertical dimensions.

Lateral Dimension. Deck placement occurs by aligning its origin with the road alignment. No other adjustment is possible.
Vertical Dimension. Deck origins can be at any elevation (or Y value in the coordinate system of the deck). Decks are vertically matched to the road above and the girders below.

Deck Width

LeftWidth and RightWidth allow the deck edges to follow road edges.

Internal slices are created at the points where either road edge changes direction in regard to the alignment. This allows the deck edges to follow road edges without the needing to manually place slices at all of these points.

Haunches

Haunch parameters align haunches with the girders below the deck.

Haunches are only aligned with non-superelevated girders (MatchGirderTopSlopesToDeckSlopes=false). Superelevated girders are ignored. If the number of non-superelevated girders in a span exceeds the maximum number of haunches (MaxHaunches) then the span is treated as if haunches are turned off.

Matching Haunches to Girders

When defining haunches, note the following rules:

When using InteriorLeftGirderOffset and InteriorRightGirderOffset parameters, out of sequence parameters will be ignored. For example, if InteriorLeftGirder1Offset, InteriorLeftGirder2Offset, InteriorLeftGirder3Offset, and InteriorLeftGirder5Offset are defined, InfraWorks will only recognize the first 3 left interior girders.
There is an assumed exterior left girder so the total number of left girders an extra girder is added to the number of left interior girders.
The HasMiddleHaunchWithNoStraddlingTaper parameter maps the middle girder to this haunch. The middle girder has a lateral offset of 0 that straddles the alignment. Haunching is turned off for a deck span if it has a middle girder but the deck does not have a middle haunch or if the span has multiple or a varying number of middle girders.