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Screws versus Nails

Screws versus Nails

Screws versus Nails

(OP)
I need to attach a wood rail to a post for a fence.  Someone suggested using a Kreg pocket hole jig that uses screws.  Do screws have more or less shear strength than nails?  Does anyone recommend using screws over nails or vice-versa?

RE: Screws versus Nails

Shear strength will vary with the diameter of the fastener more than with the strength of the metal; the shear joint will usually fail when the wood under the fastener compresses.

What a screw will provide is withdrawal resistance for a longer time if the fence is exposed to the weather. If you want to make the fence more than decorative, I would recommend screws, rather than a nail. I can tell from personal experience that a worn 6D nail in a fence is weaker in withdrawal than a Lab retreiver puppy...

RE: Screws versus Nails

(OP)
Do I know you Trussdoc?  How did you know that I am making the fence b/c of our new Lab Retriever puppy???

RE: Screws versus Nails

Just coincidence....I was just amazed how much damage an excited dog can do, and how weak nails really are in withdrawal.

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