"Walsersteg" Pylon Bridge Across Loisach River, Germany

The "Walsersteg" bridge connects both banks of the Loisach River in the south of the old town of Wolfratshausen in Germany.

The pylon bridge for pedestrians and cyclists has a width of 9.8 ft and a span width of 150.9 ft.

1117x

Pylon Bridge

Structure

An amount of 2,118.8 ft³ of glued-laminated spruce timber was needed for the deck to produce a block-glued beam with width x depth dimensions of 110 x 17.3 in.

The beam is cambered by approximately 15.7 inches and subdivided into three spans with single span lengths of 52.4 ft (2x) and 45.9 ft (1x). The joints are designed as full joints and are provided with transverse beams consisting of welded H‑sections (h/b/t/s = 15.7/19.6/1.5/1.5 inches) of steel grade S 355, in the chambers of which the block beams were factory fitted accurately.

The ends of both transverse beams are stayed with cables (d = 1.5 inches) attached to the pylon head. The superstructure is retained on the river banks by two tieback anchor cables of d = 2.3 inches, which are anchored by the substructures in the ground. The maximum cable force in the ultimate limit state is about 382.18 kip (design load). A total of around 426.5 ft of full locked coil ropes was used for the guying and tieback anchoring.

The A‑shaped pylon is about 49 ft high and consists of steel tubes (13 31/32 x 0 63/64 inches) of steel grade S 355. It is factory‑made and completely welded, except for two bolted splice joints. The maximum axial force in the circular section is approximately 404.66 kip in the ultimate limit state.

Structural Engineering	Ingenieurbüro Robert Buxbaum, Wolfratshausen, Germany www.ib-buxbaum.de
Construction	Schaffitzel Holzindustrie GmbH + Co. KG, Schwäbisch Hall, Germany Schaffitzel + Miebach GmbH, Lohmar, Germany Stahl- und Maschinenbau Graf GmbH, Weinböhla, Germany Krämmel GmbH & Co. KG, Wolfratshausen, Germany Maurer Söhne GmbH & Co. KG, Munich, Germany
Investor	City of Wolfratshausen, Germany www.wolfratshausen.de