Comment tout ça tient ?
Why do (good) stools have three legs? Why does Charlot's cane bend when he leans on it but remains rigid when he hangs on it? Why do you keep your balance better on a bus by spreading your feet apart? Quite simple questions, the answer to which, however, allows us to understand apparently very complex construction processes, such as suspension bridges or the Eiffel Tower. Student and teacher discussions, illustrative sketches, historical and technical boxes dedicated to design masterpieces, humorous examples ...
The reader is invited to travel in a very didactic way "in the land of structures".