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Stesso

Shear Test for Nailed Joint

0:08
0:29
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At 0:08 in

Do screws win this test? #framing #carpentry #testing

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What happens here

Position the wood assembly joined by a single framing nail into a hydraulic press jig. This jig should be designed to apply a shearing force perpendicular to the nail, aiming to push the two pieces of wood past each other. Gradually increase the pressure using the hydraulic pump lever. Observe the pressure gauge closely and note the maximum force applied just before the nailed joint fails. The wood piece in the video is visibly labeled "NAILS" to identify the sample.

Goal: Measure the shear strength of the nailed joint.

Tools and materials

  • Hydraulic Press — Applying controlled shearing force to the test sample
  • Nailed Wood Assembly N/A — The test sample being evaluated
  • Pressure Gauge — Measuring the applied force during the test

What they say

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We got a sheer test, structural screws versus nails. The nail held, but it only made it to about a ton. The screw snapped, but it made it to 4 ton. They both bent, but

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