Sketch roof parameters

The sketch roofs are included in the Vertex BD Architectural product. Sketch roof parameters are selected when adding the eave line or by editing the parameters of an existing sketch roof. When adding the eave line, you can open the parameters for editing in a database view in the following ways:

• By using the Trusses function on the contextual toolbar.
• By using the Rafters function on the contextual toolbar.
• During the adding of an eave line, by using the Edit roof parameters function on the contextual toolbar.

If either the roof trusses or the roof rafters are selected by default, the database view is opened when the first point, wall or line defining the eave line is selected.

The roof structure database contains predefined parameter sets. It is possible to move from one line to the other in the database using the cursor keys. On the first tab of the database view, Regular roofs, you can set the basic parameters for roofs with a truss or rafter structure.

Parameters for a basic roof with a truss structure
Parameters for a basic roof with a rafter structure

On the database view page Special roofs, you can set the parameters for different sketch roof gable alternatives.

Barn hip dimension, Barn hip pitch

The barn hip dimension and pitch determine the shape of the so-called Dutch gable. The pitch is typed in a text field either as a ratio or in degrees. The ratio can be typed either as the ratio of the height and width of the slope or as a decimal number, e.g.1/4 or 0.25. If the pitch is typed in degrees, the numeric value is followed by the letter A, e.g. 45A.

L = barn hip length	a = pitch angle
Top projection	Side projection

Mansard roof pitch

Pitch is defined for the gable of a mansard, or a hipped, roof at the eaves and the ridge of the roof. The height of the hip of the roof is defined when changing the gable shape with the Change eave shape function.

a1 >  a2		a 1 < a 2
a1 a2 h	= pitch angle at eaves = pitch angle at ridge = hip height

Limit height

The Limit height value can be used to limit the parts modeled in a sketch roof. Only the parts below the limit height are modeled in the sketch roof.

Add eave line
Edit roof parameters