Cost 0 / 2400 Status Building Vehicle - Passed 0 Max weight held 0 t
How to play: You start with just the road deck (no supports) — as-is it will collapse under heavier vehicles. Reinforce it into triangles (a truss) with Support beams to make it stronger. Tap a point, then tap the next point to place a beam (dragging also works). Choose Delete to remove a beam. Press Run Test and lighter cars drive first; each time one makes it across, a heavier vehicle arrives. Beams change color under load and snap at their limit. Always keep the road connected between the two banks.

What is Powsta Bridge

"Powsta Bridge" is a physics game where you design your own 2D bridge across a valley and send progressively heavier vehicles — from a kei car all the way to an oversized trailer — to see how much it can withstand. The bridge's behavior is computed with a mass-point simulation based on Verlet integration, and each beam is solved as a distance constraint. The weight of a vehicle is transferred to the beams, and when the strain exceeds the limit the beam actually snaps and the bridge collapses.

Tips for building a strong bridge

The key is the triangle (truss structure). A long single-span bridge sags in the middle and breaks easily, but by stringing together triangles with supports below or above the road, the load is distributed across each member and the bridge becomes far stronger. Always connect the left and right banks with a continuous Road, and reinforce efficiently within the cost limit. All calculations run entirely inside your browser, and nothing is sent to any server.

Frequently asked questions

What physics engine does it use?
It relies on no external library and runs on custom physics using Verlet integration plus distance constraints. An iterative solver resolves the tension and compression of the beams, and any beam whose strain exceeds a threshold snaps.
Can I play it on a smartphone?
Yes. It supports touch controls, so you can place beams by tapping a point then tapping again, or by dragging.
Is my data saved or transmitted?
No. All game calculations happen inside your browser, with nothing transmitted or stored externally.