Modify Truss System Grid

If there is a lock symbol near the value of parameter, it means that the truss system grid is attached to the roof (after updating grid from the roof, parameters will be updated automatically, depending on roof geometry)
After choosing the command Update from roof, parameters with the lock symbol will be updated automatically, depending to the roof geometry
First girder ply parameter describes how many girders will be placed in the first girder place

Second girder ply parameter describes how many girders will be placed in the last girder place

Important parameters:

Truss spacing
Position of “L” return roof ridges
Setback - to change setback value you need to create another type of truss system grid• Valley distribution parameters and others

Example

Modify parameters for end rafters and jacks

To set corner and end rafters or jacks parameters, choose Jack configuration

Jack Configuration:

Lsr – a distance from the wall surface to the corner side rafter. Commonly Lsr=Ler
Lsj – a distance from the wall surface to the side jack. This parameter can be calculated or user-defined. CommonlyLsj=Lej
Corner rafters – if this check box is ticked, corner rafters will be generated
End jack trusses begin from number – describes from which element are generated end jack trusses, instead of rafters
Side jack trusses begin from number – describes from which element are generated side jack trusses, instead of rafters
Side jacks (bottom chord) connected to – describes to which end jack are connected side jacks bottom chords

Parameters for defining setback and other valley parameters

If Valley Set Grid needs to be inserted, switch Off the Valley trusses will not be used check box

Valley pitch If there is a lock symbol near the value of parameter, it means that the truss system grid is attached to the roof (after updating grid from the roof, parameters will be updated automatically according to the roof geometry)