Birtavarre, Norway In the the northern Norwegian village of Birtavarre, the Sabetjohk Pedestrian Bridge spans 147 feet across the 500-foot-deep Gorsa Gorge—northern Europe’s deepest canyon. In less than a year and for just under $1 million, Oslo-based Ghilardi+Hellsten Arkitekter designed and constructed the lightweight sandblasted aluminum structure, which offers breathtaking views of the waterfall below. Fabricated in Austria, shipped by truck to Norway, and assembled in a nearby lot, the public design-build commission nearly met a dramatic end during installation. The helicopter airlifting the bridge . . .