Do Screws Shear easier than Nails? Let's find out!

  • Published on: 17 June 2019
  • Shear strength of nails and screws is something to consider when selecting a fastener for a project. For building construction, building codes come into play and some screws, such as GRK (tested per viewer request), are building code approved for some applications. A total of seven different types of nails and screws are tested in 3 types of tests to determine shear strength of each type of nail or screws. Fasteners: GRK, deck screws, drywall screws, spiral shank, galvanized 16 penny, and 16D sinkers. I purchased all the products tested and am not sponsored by any company or brand.

    Thank you very much for supporting the channel by watching the commercials and through Patreon support.

    This video is only for entertainment purposes. If you rely on the information portrayed in this video, you assume the responsibility for the results. Project Farm LLC
  • Runtime : 13:30
  • Seafoam marvels marvel mystery oil seefoam Sea foam Seefoam See Foam wd-40 project farm which nail has most holding strength spiral shank galvanized nail coated sinker uncoated 16 penny 16d nail strongest nail ring shank nail nail testing nail strength project farm nail strength test nail holding strength sheer shear shear strength nail shear strength shear load building code grk


  • rcrogers6
    rcrogers6   19 hours ago

    Fasteners are supported when stressed. We are interested in whether they will pull out as in a hurricane. That is whu we now have nails and screws certified for use in structures requiring hurricane certification. Your bending free standing fasteners is a test of the metal they are made of and the ridges or threads impressed into them. It has little to do with whether they will hold a house together in a storm. Note how short the stubby little nails aere which are used in Simpson Strong-Ties.

  • Greg Tracy
    Greg Tracy   1 days ago

    About what I thought would happen . Thank you Project Farm for the work you do .

    JOHN Q PUBLIC   1 days ago

    Before i watch I'll say nails are stronger from experience. I stand corrected

  • lambros tsipetos
    lambros tsipetos   2 days ago

    For different materials : wood hardwood plywood chipwood. Plastic

  • lambros tsipetos
    lambros tsipetos   2 days ago

    Can you make a video about the difference between screwing into material without pre-drilling and with pre-drilling. Thank you

  • atlantamx3
    atlantamx3   2 days ago

    I feel like pulling them with grain/ in the end grain is not a really great test of their holding power. youre testing the weakness of that grain, especially pulling with the grain.

  • David Homer
    David Homer   2 days ago

    You have tested so many things that anything else will get more difficult to test and evaluate. I was thinking a comparison of walkie talkies would be good. There a lot of new small ones that boast greater range than in the older ones.

  • Marc Bergez
    Marc Bergez   4 days ago

    How about testing Simpson Strong Tie #9 and #10 screw, either their 1 1/2" or 3" screws. Especially if they are suppose to be good for framing deck covers.

  • Paul Cicchinelli
    Paul Cicchinelli   5 days ago

    When testing holding power in wood, you might want to run the fasteners into the side of the wood (across the grain) instead of the end. In woodworking / carpentry, we fasten into end grain as little as possible because it doesn't hold nearly as well. However, the smoother the fastener, the less difference it makes. (Screws hold much better across the grain; common & finish nails hold better, but not by a lot.)Also, for a true shear strength test jig, I'd use 2 steel plates in a channel (similar to a guillotine), with one fixed and one pulling. "Pin" the 2 plates together with the fastener and then apply the load. This way you're ONLY testing shear strength, not how well the fastener holds into the substrate when shear force is applied.

  • KeepIt Real
    KeepIt Real   5 days ago

    Screws have little to no shear strength unless they are structural screws. This is why houses are built with nails, not screws.

  • Daniel
    Daniel   6 days ago

    I don’t even know what the title of the videos means but I shall watch anyway because Canadians

  • Chris Wyrick
    Chris Wyrick   1 weeks ago

    At 5 minutes in I realized the tested fastener was pinned to the side of the wood as a reference. Took me that long to see it. Maybe I am retarded.

  • Andrew B
    Andrew B   1 weeks ago

    I like your channel but the title is misleading, this was not a shear strength test.

  • Dr. Dad
    Dr. Dad   1 weeks ago

    Could you do a test comparing lag bolts to structural screws please

  • Ben Runyan
    Ben Runyan   1 weeks ago

    I feel that you should have braced the first test against the wood so that it sheared them off rather than pulling them out due to uneven force

  • FullOilBarrel
    FullOilBarrel   2 weeks ago

    I'm always impressed by how methodical your tests are

  • Kim Bergeron
    Kim Bergeron   2 weeks ago

    This is my 1st ever criticism of all the videos you have done. In watching this video the test with wood are not seeing the fastener fail, it's the wood that failed, then the fastener was extracted by the test jig. The bending test was valid.Overall, I still give your videos 5-stars.

  • FFA2016
    FFA2016   2 weeks ago

    Hi, nice videos but aren't you just pulling out the wood with the screws and not test the screws?

    BOSS FORD   2 weeks ago

    Still the best thing on youtube

  • Roberto moe
    Roberto moe   3 weeks ago

    Love the work this guys puts into his videos... he loves what he does and I love to watch

  • Charistiaan Harmse
    Charistiaan Harmse   3 weeks ago

    Screws will shear at the threshold as stress is concentrated at sharp corners

  • Brandy Ellis
    Brandy Ellis   3 weeks ago

    Can these tests be repeated in the way that I assume manufacturers test their own products? Testing purely shear force, with no room for the fastener to pull out? Awesome video. I continue rewatching these videos :)

  • rickrudd
    rickrudd   3 weeks ago

    Love all you do - these tests have been absolutely great. Question I have is: we all know end grain doesn't hold fasteners very well at all, why not try face grain for these tests?

  • Toros Cosmicos
    Toros Cosmicos   3 weeks ago

    This should shut down the "pros" that say nails only for deck fasteners and to only screw deck boards down.

  • sunriseshell
    sunriseshell   3 weeks ago

    Not shear, you need a test jig that keeps the board from pulling out.

  • Rob True
    Rob True   3 weeks ago

    You can snap off a hard screw- you can't with a nail.A nail has to be pulled, cut, or driven .

  • Brian H
    Brian H   4 weeks ago

    So in the end, its not that they are going to snap, its taht the wood will fail.

  • chuyg92
    chuyg92   4 weeks ago

    I know this is off topic in regards to this video but have you ever thought about testing POR-15 as a bed liner or external coating?

  • Archive 3DO
    Archive 3DO   4 weeks ago

    Have you tried testing what concrete mixtures are the best? I want to build a small patio to work on my car to restore it but I want the best concrete mixture per cost so it will last.

  • Dan Bierschbach
    Dan Bierschbach   4 weeks ago

    im always struck by how you come up with the testing devices. so clever. well done sir.

  • deiselgas
    deiselgas   1 months ago

    Id like to see a shear test of various concrete anchors such as Tapan screws, lag bolt shields, expansion bolts ect.

  • Paul G
    Paul G   1 months ago

    wow, those deck and GRK screws were interesting, they must be a hardened steel.

  • Kainoa Ladines
    Kainoa Ladines   1 months ago

    Can you do a test on strength and corrosion resistance with nuts and bolts or metal anything in general. I want to see if you could show the difference with 316 stainless, 304 stainless, steel and galvanized. Preferably with fasteners. We all buy nuts and bolts. But I don’t know the value in stainless 316 vs 304 to be honest.

  • Michael J. Caboose
    Michael J. Caboose   1 months ago

    1) I love your videos!! This is the kind of content people should see more of :)2) I am interested in the standard deviations for these tests. Were some fasteners more consistent in performance than others? How much confidence can we have in the results we've seen? Introducing statistics to quantitative tests like these can tell us a great deal more about these fasteners and their quality.3) Graph/chart of performance (lb force) per cost, perhaps?Just some ideas to mull over :)

  • Paul Z
    Paul Z   1 months ago

    how about stainless steel nails or screws ?

  • Macks Power
    Macks Power   1 months ago

    This is some very useful information, but it doesn't necessarily mean one type is better or worse, just different.Learning the limitations and benefits means you can customize use, make things more efficient etc.For example, when laminating boards I'll usually use screws on the ends, top and bottom, then quickly run back over the beam with a pneumatic framing nailer.The screws prevent withdrawal at the edges. If separation doesn't start in the field, well, it can't start in the middle.The nails in the middle are cheaper, faster, and I don't have to worry about separation because of the screws.One of the nails I started using recently seems to have a glue on the shank which is heated and activated when driven in with a pneumatic nailer. I guess we'll see if it helps in a few decades.

  • Tetra Digm
    Tetra Digm   1 months ago

    thats ALOT of variance in your nails. you need to run this test again, but not use some shit tier home depot 5$ a box nails, and use QUALITY nails. the level of variance between nails of the same type here is disgusting.