Method of installing fastener to secure metal panel to wood structural element
Fasteners are provided that include a head and having a head, a tip end having a tip, a first body portion having first threads having a pitch angle, and a second body portion having second threads, the second threads having a different pitch than the first threads. The first body portion is adjacent to the tip end of the fastener and extends a first distance along a length of the fastener towards the head end. The second body portion is adjacent to the first body portion, and extends the head end of the fastener and extending a second distance along the length of the fastener towards the head end.
1. A method of installing a fastener to secure a metal panel to a wood structural element is provided that comprises the steps of:
creating a bur of metal with a tip of the fastener as the tip of the fastener penetrates the metal panel;
causing an area of the metal panel immediately surrounding the fastener to pull away from the wood structural element with first threads on a first body portion of the fastener as the first threads pass through the metal panel, the first threads having a first diameter and a first pitch;
removing the bur of metal as the fastener passes through the metal panel;
pushing the area of the metal panel towards the wood structural element with second threads on a second body portion of the fastener as the second threads pass through the metal panel, the second threads having a second diameter that is greater than the first diameter of the first threads, and a second pitch that is different from the first pitch of the first threads; and
contacting the wood structural element with the area of the metal panel prior to the area of the metal panel being contacted with a head of the fastener or a sealing washer adjacent to the head of the fastener.
2. The method of claim 1 , wherein the step of removing the bur of metal comprises:
contacting the bur of metal with the second threads on the second body portion of the fastener; and
detaching the bur of metal with the second threads as the second threads pass through the metal panel.
3. The method of claim 1 , wherein at least one of the first three fully formed first threads on the first body portion includes serrations and the step of removing the bur of metal comprises:
contacting the bur of metal with the at least one fully formed first threads having serrations; and
detaching the bur of metal as the at least one of the fully formed first threads having serrations pass through the metal panel.
4. The method of claim 1 , wherein the first threads are triple lead threads configured to provide about 0.2 inches of forward travel per revolution of the fastener.
5. The method of claim 1 , wherein the first threads have a pitch angle α that is less than about 60°, and the method further includes the geometric configuration of the first threads performing a step of resisting back out over time.
6. The method of claim 5 , wherein the first threads have a pitch angle α that is about 45°.
7. The method of claim 6 , the pitch angle of the first threads comprising: a first internal angle β that is about 40°; and
a second internal angle γ that is 5°.
8. The method of claim 1 , wherein a second distance of the second body portion is less than a first distance of the first body portion.
9. The method of claim 1 , wherein the second threads are right-hand threads.
10. A method of installing a fastener to secure a metal panel to a wood structural element is provided that comprises the steps of:
creating a bur of metal with a tip of the fastener as the tip of the fastener penetrates the metal panel;
causing an area of the metal panel immediately surrounding the fastener to pull away from the wood structural element with first threads on a first body portion of the fastener as the first threads pass through the metal panel, the first threads being right hand threads having a first diameter and a first pitch, with a pitch angle α that is from about 20° to about 50°;
removing the bur of metal as the fastener passes through the metal panel;
pushing the area of the metal panel towards the wood structural element with second threads on a second body portion of the fastener as the second threads pass through the metal panel, the second threads having a second diameter that is greater than the first diameter of the first threads, and a second pitch that is different from the first pitch of the first threads;
contacting the wood structural element with the area of the metal panel prior to the area of the metal panel being contacted with a head of the fastener or a sealing washer adjacent to the head of the fastener.
11. The method of claim 10 , wherein the step of removing the bur of metal comprises:
contacting the bur of metal with the second threads on the second body portion of the fastener; and
detaching the bur of metal as the second threads pass through the metal panel.
12. The method of claim 10 , wherein at least one of the first three fully formed first threads on the first body portion includes serrations and the step of removing the bur of metal comprises:
contacting the bur of metal with the at least one fully formed first threads having serrations; and
detaching the bur of metal as the at least one fully formed first threads having serrations pass through the metal panel.
13. The method of claim 10 , the pitch angle of the first threads comprising:
a first internal angle β that is about 40°; and
a second internal angle γ that is about 5°;
wherein the method further includes the geometric configuration of the first threads performing a step of resisting back out over time.