Abstract: An apparatus for monitoring the fatigue strength of a structure comprises a longitudinal rib which is attached or integrated to the surface of the structure. The rib has a plurality of transverse notches of differing depths, each of the notches having a rounded end adjacent the surface of the structure and a pointed end extending toward an exterior edge of the rib.

Abstract: An apparatus for monitoring the fatigue strength of a structure comprises a longitudinal rib which is attached or integrated to the surface of the structure. The rib has a plurality of transverse notches of differing depths, each of the notches having a rounded end adjacent the surface of the structure and a pointed end extending toward an exterior edge of the rib.

Abstract: An improved dry bridge kit, composed of individual bridge bays of cross-sectional U-shape and of a cross-sectionally H-shaped traversing beam, the improvement comprising that the bridge bays are composed of a central part and of two side parts, the side parts containing hollow parallelipipedic track ways, and being foldable for transport underneath the central part. When launching the bridge, first the traversing beam is assembled and launched and then the individual bridge segments are coupled together and moved over the tranversing beam. The traversing beam remains as a bridge support element.