Awais Safder Malik

Hey fellow engineers, i have three questions 1. Acoustic design for a suspended slab according to any standard? 2. Any idea about unilateral support system for a bridge deck? 3. how to model a CHS space tubular section in SAP 2000 according to BS5400? Please let me know with whatever informations/knowledge you have. thanks!!! no google materials because i already have ample info from google. i just want to get an insight in respect to experienced engineer. thanks