How are purlins correctly positioned on roof beams?
Question:How are purlins correctly positioned on roof beams?
The model used in this example contains roof beams and purlins.
At first, the bars are placed relative to their central axis:
- Select the beam and modify the eccentricity to 0,-z in the properties window.
- Select the purlin and modify the eccentricity to 0,+z in the properties window.
- Slope the purlin placing its lower flange on the beam upper flange. You can choose between two methods:
- To measure the slope angle, use the Ctrl + G shortcut, and then select three points in the model that describe the measured area. In our example, the measured angle is 45 degrees.
- Modify the purlin orientation angle to 45 degrees in its properties window.
- Define the reference point at one of the beam's ends (in this case, at the upper end). The created point is automatically numbered with "1" (if it is the first point created in the model).
- Select the purlin. Enter the point ID in its properties window as shown below, to define the purlin orientation by point. The purlin's y-axis will slope towards the specified point.
- Modify the purlin orientation angle.
The beams and the purlins are now correctly positioned.