User Manual Q&AAnswer
Mar 03, 2025 - 11:42 PM
To select the right anchor bolt for your application using the Vestil 442873 Concrete Lag Bolts, you need to consider the thickness of the material being fastened to the concrete, the minimum embedment depth, and the thickness of the nut and washer. The formula for calculating the minimum recommended anchor length is F + E + N = ML, where F is the fixture thickness, E is the embedment depth, N is the nut and washer thickness, and ML is the minimum recommended anchor length.
For example, if you want to anchor a piece of 4x4 timber to a concrete surface using a 1/2" wedge anchor, you would calculate the minimum length of the anchor as follows:
Fixture thickness (F) = 3.5"
Embedment depth (E) = 2.25"
Nut and washer thickness (N) = 0.5" (estimated as the diameter of the anchor)
Minimum recommended anchor length (ML) = 3.5" + 2.25" + 0.5" = 6.25"
Therefore, the minimum length of a 1/2" diameter wedge anchor to use for this application would be 6.25".
It is important to ensure that the hole in the concrete is drilled to a depth at least equal to the overall length of the anchor minus the thickness of the material/fixture being fastened.
Please refer to the "SELECTING AN ANCHOR FOR YOUR APPLICATION" section in the Vestil 442873 Concrete Lag Bolts instructions for more details and examples.
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