Building Construction by Charles Mitchell

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The following diagrams show the Plan and Vertical Section of a Circular Hoffmann Kiln

Images from: Mitchell (1925) Building Construction page 128

These drawings show an Improved Hoffmann Kiln. First, there is a Plan, then a Half Longitudinal Section and a Half Elevation. Finally, there is a Transverse Section

Images from: Mitchell (1925) Building Construction page 130

side by side

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, particularly between Britain, Australia and America. They have been referred to as Culvert, Arch, Chimney, Radial and Tapered. The best place to look is the British Standard, BS 4729

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

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

left and right culvert

Some writting within the dividers

Top Left

Top Right

Outside of format



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Left and Right

Some writting within the dividers

Top Left

Middle left

Bottom Left

Top Right

Middle Right

Bottom right

Outside of format

Hanson

Hanson Bricks
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ibstock

Hanson Bricks

Ibstock Bricks

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Ibstock Bricks