Frequency of buildings

Frequency of FLOORS of structures should be:

• Normal structures:   greater than 3.5 Hz

• Sport hall, Concert hall: greater than 7 Hz

• Facade cassets (vertical areas): greater than 4 Hz

Safety coefficients on Mass groups 

• permanent loads  1

• life load 0.3

Фрекфенција на објекти пониски од 15m  --> НЕ МОРА ДА БИДЕ ПОГОЛЕМА ОД  3.5 Hz

Sources of vibration