Structures

A four-metre gap and a flat deck laid across it. Nothing holds the middle up. Get a small car to the far side without the road sagging into the ravine.

Same idea, wider gap — and this time a fully loaded truck makes the crossing. It weighs four times what the car did, and it doesn't stop in the middle.

Twelve metres to span, no cables in the crate, and a budget that won't cover brute force. There is a shape that solves this. Find it.

The far cliff has crumbled away. You have anchors on the left bank only, and the deck has to reach six metres out over nothing with a truck parked at the tip.

An eight-tonne water tank has to sit ten metres up. Hold it there — then hold it there while the ground shakes.

Eighteen metres up, twelve tonnes of occupied floors, and a quake that hits harder and closer to your tower's natural rhythm. Everything you know, at once.