Two courses of Corbelling also appeared on the two chimneys located at the back and in the center section of the building.
"The Fairfax County Courthouse"
Ross D. Netherton Ruby Waldeck
Buildings in which this system is used are occasionally roofed with slabs, but more often Corbelling is employed.
"Rough Stone Monuments and Their Builders"
T. Eric Peet
The chamber is circular, and roofed partly by Corbelling and partly by a large slab.
"Rough Stone Monuments and Their Builders"
T. Eric Peet