Piirustuksilta

Piirustuksilta is a pedestrian and bicycle bridge spanning the Helsinki Parliament House courtyard in Finland. Designed by architect Alvar Aalto, the bridge features a rectangular lintel supported by stone piers.

Composed of a wooden framework, the bridge's roof structure is patterned on the tympanum surrounding a rectangular opening at a Classical temple's front. Aalto created the form as an abstract treatment of a stylistic concept.

The country's parliamentary building opened in 1931, with Aalto's bridge completed in the following year. Aalto extended and adorned the Parliament House courtyard's development over several years, contributing to the space's ensemble-like air. His work on the courthouse is considered broadly reflective of the formal use of materials at the time in post-World War I Eclecticism.

Piirustuksilta's stability derive from its minimalist approach. There are little projections on the beam's edges separating it from the round\Context-used pipes reportedly linked to possible support. The structural element is geometric and allows recessing the profiles that rest nSimply three vertical posts.