This is a five-span metal bridge of a sliding-opening system with a draw span in the middle. The draw span is a metal all-welded double-wing with a fixed axis of rotation. The counterweights are fixed on hinges. The Birzhevoy Bridge is raised using an electromechanical drive. This is one of the few draw bridges in St. Petersburg where such a mechanism remains; most bridges have already switched to a modern hydraulic system. The control panel is located in the left-bank support of the draw span.

The draw mechanism of the Birzhevoy Bridge has no analogues in the world: at the beginning of the draw, the bridge opens by 15 centimeters, and the wings roll away from each other. The center of gravity of the wing changes, which significantly facilitates the draw.

The bridge abutments are massive reinforced concrete on a pile foundation, faced with pink granite.

The tridents of the ancient Roman god Neptune are depicted on the cast-iron gratings of the railing. They emphasize the status of St. Petersburg as the maritime capital of Russia.