
Foundations and ground
Why does a wider footing lower ground pressure?
A spread footing
Follow the load from foundations to roof, then explore the systems that make a building work.

A spread footing

A continuous wall footing

A raft on compressible ground

Four columns under a Joglo roof

Inside an elevator shaft

Water through a house

How a toilet flushes

Moving heat into a house

Fresh air through warm plates

The room that switches its heat

Light scattered by smoke

The local thermal sprinkler

The pump that watches water rise
13 experiments to explore. No account. Just curiosity.