FOOT - UNIT AND ARCHES

Question 1

use of foot as a unit?

Answer 1

• support body weight
• propel body
• adapt uneven surfaces

Question 2

is the arches of the foot present at birth?

Answer 2

yes

Question 3

what are the three arches of the foot?

Answer 3

medial longitudinal arch
lateral longitudinal arch
transverse arch

Question 4

mechanisms of arch support?

Answer 4

-shape of stones
- INFERIOR EDGES OF THE STONES ARE TIED
TOGETHER
- use of the tie beams
-suspension bridge

Question 5

> SHAPE OF THE STONES:

Answer 5

• make the stones wedge shaped, with the thin edge
  of the wedge lying inferiorly
• applies particularly to the important stone that
  occupies the center of the arch and is referred to as
  the “keystone”

Question 6

> INFERIOR EDGES OF THE STONES ARE TIED

TOGETHER

Answer 6

• accomplished by interlocking the stones or binding

their lower edges together with metal staples

Question 7

> USE OF THE TIE BEAMS

Answer 7

• When the span of the bridge is large and the
  foundations at either end are insecure, a tie beam
  connecting the ends effectively prevents separation
  of the pillars and consequent sagging of the arch

Question 8

> SUSPENSION BRIDGE

Answer 8

• depends on multiple supports suspending the arch

from a cable above the level of the bridge