# Roof Components - Purlins from Profile

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Using the "Purlins from Profile" function, purlins can be adopted from the profile.

With the selection list at the top of the dialog box you can choose existing settings. Using the disk icon you can save the current setting under the same name or a new name. Via the management icon new settings can be created, also by adopting existing settings, and existing settings can be modified or deleted. See "Save settings" in the "General Help" manual for details.

**Purlin direction:** With the "Purlin direction" option you specify at which end of the purlin the purlin start and at which the purlin end is located. For this, the roof surface is considered from the eaves. This information is then important if you write member numbers at the member start on the rafter-purlin plan and you want to influence the position of the number.

In addition, this setting affects the transfer of purlins to the machine: Two opposing purlins on a gable roof are both entered with the start on the left (Left -> Right). The rafters lie at different spacings on a roof surface and were thus transferred to the opposite roof surface. Marks are generated on the purlins from the rafters. As a result, after sorting both purlins are different and are transferred to the machine separately. If one purlin has the start on the left and the opposite purlin has the start on the right, the marks on the purlins have the same distance to the respective member start. Therefore both purlins are identical and receive the same number during sorting.

After configuring all values and options, you can input the purlins using the following buttons:

**All roof surfaces:** On all roof surfaces where a profile is attached, all purlins are generated from the respective profile. If multiple profiles are attached to a roof surface (possible with offsets in the floor plan), the program asks which profile should be used.

**Continuous:** On the graphically selected roof surface, all purlins are generated from the profile that is attached to the house side of that roof surface. If multiple profiles are attached to this roof surface (possible with offsets in the floor plan), the program asks which profile should be used.

**Length-limited:** By selecting two points, the length and position of the purlins can be specified. The first entered point simultaneously determines the roof surface on which the purlin is to be generated. The midpoint between the two selected points additionally determines the point on the building outline from which the profile should be taken.

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