The functional requirements of the element sof a building are :

1. adequate strength & stability . 
2. Weather resistance 
3. Thermal insulation 
4. Sound insulation 
5. adequate light & air . 
6. Fire protection 

Fuunction Requirements 

• The primary function requirement of a building is tot carry safely all the loads imposed it without deforming excessively under load as  a whole or in its parts . 
• This function is efficiently achieved if its design & construction are provided  with adequate strength , stability & fire resistance .