"Walsersteg" Pylon Bridge across Loisach River, Germany
In October 2013, the "Walsersteg", a bridge for pedestrians and cyclists built across the Loisach River, opened in the south of the old town of Wolfratshausen in Germany. The bridge connects the existing traffic ways on both sides of the river. The uncovered bridge spans the Loisach without columns and has a pylon guyed on one side. The structure has a width of 9.8 ft and a span width of 150.9 ft.
Ingenieurbüro Robert Buxbaum, Wolfratshausen, Germany
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
City of Wolfratshausen, Germany
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 in 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 in) 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 in) attached to the pylon head. The superstructure is retained on the river banks by two tieback anchor cables of d = 2.3 in which are anchored by the substructures in the ground. The maximum cable force in the ultimate limit state is about 382,175 lbs (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 (355 x 25 mm) 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 404,656 lbs in the ultimate limit state.
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