1. The screw type should be properly matched to application;
2. Screws should be fixed with mechanic torque regulated screwdrivers;
3. When assembling steel plates, profileed sheets, and sandwich panels, use screwdrivers with depth regulator;
4. According to the guide IFBS Z-14.4-407 screws should only be fixed at the straight angle (90°) to the base;
5. The time needed to drill out two steel plates with drilling self-tapping connectors should not exceed 20 seconds;
6. Upon fixing, the side of EPDM cushion layer should be a bit rounded, lens-shaped;
7. Screw heads should be covered with the caps which are made of UV-resistant materials or can be painted with polyester powder coatings;
The screw mounting methods other than those specified in this manual should be specified in the design and accepted by the designer based on consultations with the screw manufacturer.
Independent test results available upon request. Lumber for these tests is typical of the woods used in post frame construction. All lumber is constructiongrade with the exception of “economy fir” which is unrated. This lumber was not kiln dried. Tighter grain structure would provide a substantial increase in pullout values. Values with 1” penetration can vary from 240 lbs. to 1150 lbs., depending on wood density. We believe these are typical values found in field applications. These values are ultimate with no safety factors. Recommended minimum penetration is 1”, except for plywood.