Question

A labeled diagram of an arch. The very center stone of the arch is labeled A. The stones of the curve are labeled B. The stones of the straight portion are labeled C. The direction of weight thrust is on the B stones. The springing point is on the C stones.
Look at the diagram above. What is part of the arch’s anatomy is (A) labeling?
a.
impost
c.
keystone
b.
springing line
d.
voussoir



Please select the best answer from the choices provided


A
B
C
D

Answer 1

C — keystone. The central/top-most voussoir that locks the arch in place is called the keystone.