How to Avoid Blowouts in the Wood Using a Nail Gun
Part of the Video Series How to Use a Nail Gun
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How to Avoid Blowouts in the Wood Using a Nail Gun
This is Rob McManhon for Expert Village. The one thing you want to be careful of is avoiding cracks or blow outs. With a nail gun, a blow out could send the nail flying. Now I'm going to attempt to force a blow out or a crack which is generally something to be avoided. So I'm going to use the safety glasses for this one. You want to look at the characteristics in the wood. Here we have a knot. Wherever you have a knot you are going to have green reversals and a weakened spot in the wood. If you look at the side here you can tell that this knot is coming through this direction. So this area right here is a very likely spot for a blow out. You also have a knot coming through here so this section of this 2x4 is the most likely to be compromised. Now we are going to try for a blow out here. Generally you want to stay away from a spot like that. We are going to try to cause it. Alright. Now we didn't get a blow out but what we did get is a redirection of the nail. The knot's much harder then the spruce itself and the nail is going to look for the path of least resistance. In harder woods you can see these different lines in growth: the lighter areas are spring growth. The darker areas are fall growth. The darker areas are a lot harder. Now especially with harder woods if you shoot onto the soft wood and the angle of the grain is coming in a different angle it'll catch your nail and send it a different direction.
This is Rob McManhon for Expert Village. The one thing you want to be careful of is avoiding cracks or blow outs. With a nail gun, a blow out could send the nail flying. Now I'm going to attempt to force a blow out or a crack which is generally something to be avoided. So I'm going to use the safety glasses for this one. You want to look at the characteristics in the wood. Here we have a knot. Wherever you have a knot you are going to have green reversals and a weakened spot in the wood. If you look at the side here you can tell that this knot is coming through this direction. So this area right here is a very likely spot for a blow out. You also have a knot coming through here so this section of this 2x4 is the most likely to be compromised. Now we are going to try for a blow out here. Generally you want to stay away from a spot like that. We are going to try to cause it. Alright. Now we didn't get a blow out but what we did get is a redirection of the nail. The knot's much harder then the spruce itself and the nail is going to look for the path of least resistance. In harder woods you can see these different lines in growth: the lighter areas are spring growth. The darker areas are fall growth. The darker areas are a lot harder. Now especially with harder woods if you shoot onto the soft wood and the angle of the grain is coming in a different angle it'll catch your nail and send it a different direction.
About the Expert
Expert: Robert McMahon is a master carpenter with over 20 years of experience. Read More
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