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Stesso

Shear Test for Structural Screw Joint

0:14
0:29
89.4K views

At 0:14 in

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

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What happens here

Place the wood assembly joined by a structural screw into the same hydraulic press jig used for the nail test. It is crucial that the setup for both tests is identical to ensure a fair comparison. Carefully apply increasing pressure using the hydraulic pump lever. Continuously monitor the pressure gauge and record the maximum force exerted just as the structural screw joint fails. The wood piece in the video is labeled "STRUCTURAL SCREW" for clear identification.

Goal: Measure the shear strength of the structural screw joint.

Tools and materials

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

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 this did fail in a real application.

Auto-generated from the video audio.