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Richard Czeizler

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  1. In various contexts it is convenient to support shear loads through an LVL (or other timber) bolted to concrete e.g. to support temporary working deck; wheel stop; timber raking strut etc. Is there guidance or do people have opinions on what length should be taken for the lever arm of the bolt. I have in the past considered 1/3 of the thickness of the LVL above the concrete by assuming the bearing of the timber onto the bolt is triangular, larger bearing at plane of concrete. What have other people used? In term of analysis, Profis allows you to stand-off the steel plate from the concrete.
  2. AS3600:2018 table 8.4.3 describes coefficents of friction for concrete to concrete in the context of logitudinal shear in composite beams. Ignoring the the cohesion factor, do we think these values are reliable for other contexts? i.e. lateral loads on precast slabs that do not yet have a positive connection to the PC beam.
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