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  1. Vipul Acharya

    LVL or 2 layers of plywood for stair treads

    I want to build a stair case and clad the treads, so the appearance of the tread is not important. I am wondering whether to use 2 layers of 1" plywood or 1.75" LVL laid flat. I can't find the modulus of elaasticity for the LVL about the weak axis. The stair treads are 48" wide x 12". Thanks!
  2. Vipul Acharya

    Sound Absorption and Decibel Drop

    I have sound absorption coefficients for a material that was obtained through testing. I have the sound absorption coefficients at various frequencies as well as overall NRC, SAA and αw. I would like to be able to translate this to a decibel drop. How many decibels will be reduced with this...

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