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TM Mastering Parametric Trusses Ben May Irwinconsult Truss Example 1 Top Release Truss – Even Bays Revit Technology Conference 2010 Truss Example 1 Parameters Required 1. Array Number NumberPanels 2. Maximum bay width MaxPanelWidth 3. Actual bay width ActualPanelWidth Part of truss template Truss Length Truss Height Revit Technology Conference 2010 Truss Example 1 Truss Formulas NumberPanels ActualPanelWidth Truss Length / (MaxPanelWidth * 2) + 1 Truss Length / (NumberPanels * 2) Revit Technology Conference 2010 Truss Example 2 Truss with 2 Intermediate setout points Revit Technology Conference 2010 Truss Example 2 Parameters Required 1. Support Location 1 Support1 2. Support Location 2 Support2 3. Maximum bay width MaxPanelWidth 4. Actual bay widths Bay1 5. Bay Array Number Bay1_Array Bay2 Bay3 Bay2_Array Bay3_Array Part of truss template Truss Length Truss Height Revit Technology Conference 2010 Truss Example 2 Truss Formulas Bay1_Array Support1 / Max Panel Width Bay1 Support1 /Bay1_Array Bay2_Array ((Support2 – Support1) / Max Panel Width) Bay2 (Support2 – Support1) / (Bay2_Array) Bay3_Array ((Truss Length – Support2) / Max Panel Width) Bay3 (Truss Length – Support2) / (Bay3_Array) Revit Technology Conference 2010 Truss Example 3 Façade truss with start and end horiz. offset Revit Technology Conference 2010 Truss Example 2 Parameters Required 1. Array Number NumberPanels 2. Maximum bay width MaxPanelWidth 3. Actual bay width ActualPanelWidth 4. Start/End Offset SupportOffsetStart SupportOffsetEnd Part of truss template Truss Length Truss Height Revit Technology Conference 2010 Truss Example 3 Truss Formulas NumberPanels ActualPanelWidth (Truss Length - (SupportOffsetStart + SupportOffsetEnd)) / MaxPanelWidth + 1 (Truss Length - (SupportOffsetStart + SupportOffsetEnd)) / NumberPanels Revit Technology Conference 2010 Questions? Ben May Revit Technology Conference 2010