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structures (force (a force is anything that can deform a body or chance…

- - - - the force of the wind
      - mechanical forces
      - presure of gases
      - the force created by our own muscles
      - gravity
- - - - loads are called the forces that act in a structure
        
        there are two main different types of loads
        
        fixed or permanent loads
        
        they always affect a structure in the same way
        
        variable loads
        
        variable loads are occasional and changeable
- - - - mayn types of structures
        
        traction
        
        bending
        
        compression
        
        torsion
        
        shear or cutting