What is meant by the title of this article and the Eastern proverb “the arch never sleeps”?

a.An arch consists of two weaknesses so it’s always shaky and needs to ‘stay awake’.

b.An arch is always working to hold itself up. It has to “stay awake” or it will crumble.

c.The voussoirs rest on the centering until the keystone is wedged into place so they never ‘sleep’.

d.An arch can carry more weight than a straight beam can across the same span, so it's used frequently and hence never ‘sleeps’.

Question

What is meant by the title of this article and the Eastern proverb “the arch never sleeps”?

a.An arch consists of two weaknesses so it’s always shaky and needs to ‘stay awake’.

b.An arch is always working to hold itself up. It has to “stay awake” or it will crumble.

c.The voussoirs rest on the centering until the keystone is wedged into place so they never ‘sleep’.

d.An arch can carry more weight than a straight beam can across the same span, so it's used frequently and hence never ‘sleeps’.

anonymous · Answer

@Wolfboy can you help? ;)

wolfboy · Answer

I would say B since an arc supports itself

anonymous · Answer

what do you mean? @Wolfboy

wolfboy · Answer

I mean that an arch is a structure, of all kinds, and it supports itself. Therefore if it "rests" it would get destroyed