Left Column

Although these specials may seem inter-changable, there are subtle differences, related to which side of the brick is buttered and which is the face-side

Stretcher

Header

These two are used for brickwork that is circular on plan, like chimneys or water-wells, where the circle is flat and horizontal

The names denote the face on the resulting brickwork

Sources vary on the correct term for these bricks. They have all been referred to as Culvert, Arch, Chimney, Radial and Tapered

Stretcher

Header

This is where the brickwork is circular on the elevation, such as arches or windows

In this case the circle would be upright or vertical

Again, the names denotes which face is seen on the finished work