On the properties palette from the type selector drop down select the truss type.
How to lay a roof onto trusses revit.
Click modify structural trusses tab modify truss panel attach top bottom.
Creating trusses in revit.
To attach a truss 1 verify that roof and structural floor visibility is turned on in the current view.
Click modify place truss tab draw panel line to specify the start point and endpoint for the truss or click pick lines and then select an edge or line to which you want to constrain the truss model.
2 select one or more trusses to attach.
The attached surface of a structural floor or roof determines the chord geometry.
Top or bottom for the appropriate truss chord being attached.
Attach a truss to a roof or structural floor to force the truss to conform its chords to that element.
Select one or more trusses to attach.
Click modify structural trusses tab mode panel reset profile to re pin and set truss members back to their default definition.
Remove a truss and leave beams in place remove a truss family from a project and leave its chords and webs in place.
On the options bar select attach trusses.
Verify that roof and structural floor visibility is turned on in the current view.