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  • Users: WhoJuntao
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  1. WhoJuntao

    Swimming pools

    Hi, I have (the design of) a hotel and a swimming pool on the roof and another one at the ground level in front of it. The upper pool and utilities are covered by a glazed dome, the lower pool is "outdoor". Can you please tell or point out the relative NFPA 72 requirements for both...
  2. WhoJuntao

    Wave propagation

    Hi, I read somewhere that a given radio signal has a wavelength of 1Km and since the wall in front of it is only 1m thick, the wave has no problem penetrating it. It is only when the wavelength starts to compare with the ditance between the iron ribs in the concrete wall that reflection...

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