To check if bolts collide with profiles and if there is enough space to fix the bolt, you can define a clash check clearance area for bolts.

1. On the File menu, click Settings > Options.
2. In the Options dialog box, go to the Clash check settings.
3. Modify the bolt clearance values.

   If the boxes are empty, Tekla Structures uses the default value 1.00.

   

   	d is the larger value of the bolt head or nut diameters
   	Clash check clearance area

4. Ensure that you have selected the check box in front of each box.

   If you clear the check boxes, the clearance will be zero.

5. Click Apply or OK.