29
4J: COURSE 4
Lay Dome Course 4, starting at the back in the center.
This is made up of Type 1 bricks, and two small
‘stagger’ bricks to keep the vertical joints in the dome
brickwork offset as shown.
4. Building the Dome
4K: COURSE 5
Lay Dome Course 5.
This is made up of Type 1 and Type 2 bricks, in an
alternating pattern.
4L: LAY THE ENTRY ARCH
Do a ‘dry-run’ of the Entry Arch, to check the gaps between each brick. The Entry Arch bricks are a full sized arch
brick with a chamfer cut off the back face, so they should be easy to identify.
Once you know the required gaps, lay the Entry Arch bricks over the #1 formwork, working from the outside in.
With the full arch in place, the weight keeps the joints in compression and the arch becomes self supporting.
To Next Page