Deck 37: Construction of Semicircular and Segmental Arches

Question 1

Any type of arch needs to have flashing and weep holes installed to prevent moisture from penetrating and staying in the wall.

Answer 1

True

Question 2

The rule for segmental arch construction is that the minimum rise should always be _____ the width of the opening or span, if the arch is to be self supporting and not on a form.

A) equal to one-eighth
B) more than one-fourth
C) up to one-half
D) no more than one-sixteenth

Answer 2

A

Question 3

For arches _____ long, a good construction grade of ¾" plywood is excellent for the front and back of the arch form.

A) up to 6'
B) more than 6'
C) between 5' and 10'
D) more than 10'

Answer 3

A

Question 4

For minor arches _____ is usually enough time for curing if the temperature is not freezing and the mortar is setting correctly.

A) 3 hours
B) 24 hours
C) 48 hours
D) 3 days

Question 5

The bottom mortar joint that is set on an arch form should be slightly angled inward because it must be cut out with a chisel to a depth of _____ after the arch form is removed and repointed.

A) 1"
B) ¾"
C) ½"
D) ¼"

Question 6

The back of the arch should be parged.

Question 7

Construction of an arch is always begun at the two ends and laid up to the center of the arch.

Question 8

A bonded soldier course is a minimum of _____ in height.

A) 4" or a half brick
B) 8" or a whole brick
C) 12" or a brick and a half
D) 16" or two bricks

Question 9

A mason should not construct an arch form but rather find a carpenter to complete this task.

Question 10

The mortar joints on an arch should be large to give support to the arch.

Question 11

If a brick must be moved after the mortar in the arch has set, fresh mortar should be applied and the brick relaid.

Question 12

Rowlocks should not be used as a bonding arrangement for semicircular brick arches.

Question 13

Brick arches are for aesthetic purposes and should not be used to support a heavy load.

Question 14

Do not remove the arch forms until the arch has cured enough to carry its own weight without sagging.

Question 15

Arch brick can be laid in several positions for semicircular arches.