It depends on what your making out of. I only know about wooden models for metal, etc you'll have to ask someone else. But if your making it out of wood then you need to give it a lot of trusses, beams, archs and make sure it has pivots.
this is my first answer !
Pericles strengthened the greek democracy
Strengthened
They both strengthened their country's militaries.
Micheal Bridges, Malcolm Brdges, and Joana Bridges
arch bridges
Bridges on Bridges - 2011 was released on: USA: May 2011
Iqbal Husain has written: 'Performance of integral abutment bridges' -- subject(s): Abutments, Bridges, Bridges, Concrete, Concrete Bridges 'Semi-integral abutment bridges' -- subject(s): Abutments, Bridges, Bridges, Concrete, Concrete Bridges
Acted as healing balm strengthened the world position of the us
Lucille and Abonruby bridges parrents names were lucille bridges and abon bridges, lucille is her mother and abon bridges is her father, yah i know thatdon't yah me whoever wrote this because we all know london briges is her mom and falling down bridges is her dad lol
arch bridges
The possessive form of bridges is bridges'
Fixed Bridges or Moveable Bridges