The Expo Axis is one of the world's largest membrane roofs. It spanned the entrance and boulevard building of the World Exposition 2010 in Shanghai.

The combination of the membrane structure, which has a surface of 65,000 m2 in total with a span of 100 m, and the six steelglass funnels of 45 m height, formed of a freeform double-curved framework, constitutes the landmark of the Expo Shanghai 2010.

Besides the China Pavilion, the Expo Axis is the largest and most significant building on the site. It forms the central entrance area and provides 334,000 m2 effective area for numerous facilities. Via the about 1 km long and about 100m wide axis, which stretches across the entire site to the Huangpu River, the visitors are guided to the various national and theme-based pavilions.

The Expo Axis and its boulevard is one of five buildings which remain after the end of the world expo to form the centre of a new urban district of Shanghai.

The Expo Axis is covered by a membrane roof with a total surface of 65,000 m2, currently the largest of its kind in the world. The roof is carried by 19 interior and 31 exterior masts and by six funnel shaped framework shells consisting of steel and glass. It has a height of 45 m and a free projection of 80 m. These so-called Sun Valleys direct natural LED light below.  www.sigmasenmo.com