Sant Pere Sacarrera Footbridge Produced From Corten Steel By Alfa Polaris

This Corten steel footbridge arches across a bypass in Spain to connect the tiny town of Sant Pere Sacarrera with a ne2rk of woodland pathways (+ slideshow).

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

Spanish civil engineers Alfa Polaris designed the footbridge to hyperlink 2 banks that are both at various ranges, producing a safe pedestrian crossing that isn’;t going to disrupt site visitors flow.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

“The client not only wished to give pedestrians a pleasant user encounter, but also carry out an appealing design that would boost the visual knowledge of the drivers,” explained the style crew.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

Formed of 2 truss girders, the asymmetric bridge is produced from pre-weathered steel that will resist any even more corrosion. The deck comprises a row of timber slats.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

The northern end of the bridge is positioned greater and attributes a zig-zagging ramp to make up for the slope, whilst the southern side is a square platform.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

“[This] produces a type of balcony piazza that offers customers wonderful views above the town and its surroundings,” explained the engineers, who previously designed a similar Corten steel footbridge elsewhere Spain.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

Lower-maintenance LED lamps light the bridge at night.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

Photography is by Xavier Font.

Here’;s some much more information from the designers:


Sant Pere Sacarrera Footbridge

This footbridge more than the new bypass of Sant Pere Sacarrera is part of an Y-shaped itinerary that back links the town centre with 2 footpaths that give entry to a forest spot and have been interrupted by the new road. The consumer not only desired to give pedestrians a pleasant consumer knowledge, but also carry out an eye-catching design and style that would improve the visual encounter of the drivers, avoiding, nonetheless, luxurious options.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

The aim was to get a proposal with diminished complete existence price and environmental burdens. For this cause the layout crew proposed a Corten steel truss girder construction – extremely efficient from the structural stage of view and whose rusted skin protects itself from additional corrosion – for the deck the use of LED lamps – with extended life span and vitality efficiency – for the street lighting in excess of the footbridge and polymeric timber – with practically no servicing – for the decking above the framework.


Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

The layout of the new footbridge was strongly conditioned by the asymmetric shape of the cross section of the street trench, marked by the diverse level of the 2 banks. A footbridge composed by 2 aspects was proposed. The primary 1 is a 2 span continuous deck formed by 2 Warren truss girders with variable depth, linked with each other at bottom flanges by transversal beams. The latter, in turn, give support to the variable wide polymeric timber decking via longitudinal joists.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

The principal span of this element crosses the road, even though the 2nd one remains integrated to the north abutment, the place a zig-zag ramp raise its degree and as a result aids lessen the longitudinal slope of this component.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

The 2nd element is a square platform integrated to the south abutment, which creates a type of balcony piazza that gives customers excellent views over the town and its surroundings.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL

The major girders have a slight curved form in elevation and their depth varies, becoming highest at the north end – exactly where the deck width is minimum – and minimal at its south finish – where the deck width is greatest.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL_dezeen_18Site plan – click for bigger picture

Given that the upper chord of the truss has no bracing, in purchase to avert it from lateral buckling, the designer enhanced the torsional stiffness of the bottom chord by providing it a hollow box shape, reinforced the lateral stiffness of the web members and enhanced the width of the top chord, to which an inverted U form was offered. This enables adequate space for the lights to be embedded in it.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL_dezeen_19Site plan – click for more substantial picture

High efficiency minimal servicing LED engineering lamps had been put in on each and every of the bays of the truss. This answer not only provides an agreeable street lighting along the crossing, but, by signifies of the combination of light and shadows, in the night it highlights the attractiveness of the construction.

Sant Pere Sacarrera corten steel Footbridge by Alfa Polaris SL_dezeen_20Development and detail drawings – click for larger image

Undertaking title: Sant Pere Sacarrera Footbridge
Area: Mediona, Catalonia, Spain
Design: 2007-2008
Development: 2011-2012
Client: Diputació de Barcelona
Notion style and engineering: Xavier Font, Alfa Polaris
Common contractor: Excavaciones y Construcciones Benjumea, S.A
Structural technique: Constant Corten steel Warren truss girders

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