Ring-beam Footing.

Ring-beam Footing

The ring-beam footing was an early milestone. Here, it’s ready for McGuckin and Mallon to attach the Airform and start construction.

Image by Hannah Mallon and Kevin McGuckin via Monolithic Commons

CC BY 4.0

Download image

Original (4523×3015) / Huge (1920×1279) / Large (1600×1066) / Medium (1280×853) / Small (960×639) / Thumb (640×426)

They Built Forty-Eight Domes in Texas and One Dream Dome in Tennessee