Why Are Bricks Frogged?

Bricks are often completely solid, but they can also have holes perforated through them to reduce the amount of material used. ... The frog reduces the amount of material used to form the brick, makes it easier to remove from the form, and gives the completed wall better shear resistance.

Why are bricks called frogged?

In the 1930s the bricks were made by hand in slop moulds and the indent required a wooden former in the bottom of the mould box. This looked like a crouching frog and the name stuck despite its reference to the indent.

What is the depression in a brick called?

A frog is a depression in one bearing face of a molded or pressed brick. The frog reduces the weight of the brick and makes it easier to remove from the forms.