structure
       
is a collection of elements arregnged in a optimum way to support a body or an collection

           murallas de Avila

   different types of structure :

     Mass structure:  these are solid, heavy and very sturdy structures.
    Fame structure :  these structure are formed by columns and beams that act as
      supporting elements.
    Truss structures :  these structures are composed of bars that form triangles.
    Suspensed structure : these are held in place by cables and suspenders attached to sturdy
     support



                                                                                   

                                         

                                                          

     mass structure :                                                                                     frame structure :

                                   
             suspensed structure :                                                                          truss structure
                                                      
                                                                               

                                                   

                                               


force : is an influence that can deform a body or change its movements
        or produce motion in a body at rest
 
   stresses : are the physical demands that a body or object must withstand when
       one or more external forces are applied to it