and Technology regarding the production and testing (on proving ground) of composite pontoon bridge. The starting point for this work was the experience gained from the project named "Light, resistant to environmental hazards, aluminum-composite hybrid pontoon used in constructing floating bridges of MLC 70/110 class". Each one of the three V-shaped outriggers was designed using different technology. The middle part was constructed mostly of aluminum by company PREMO, but the smaller outrigger and all parts of the bow were made at Wroclaw University of Science and Technology from composite material reinforced with glass, aramid and carbon fibers. The inside was filled with multiple types of foam. During successful tests on proving grounds, conducted by Military Institute of Engineer Technology, elements were connected with PP-64 pontoons. It was proven that Wroclaw scientific society is capable of designing and manufacturing of a prototype pontoon bridge park.

Events related to climate change and the increase in the occurrence of natural disasters, as well as the increasing incidence of new diseases, have all caused the prominence of regional security and crisis management around the world to rise. Three-dimensional printing, which has seen noteworthy developed in recent years, both in terms of print parameters, and the magnitude of the production potential, may prove helpful in this matter. Enormous opportunities have arisen which, if properly directed, can save human life and preserve health in crisis situations, when traditional supply chains could be disrupted or even prevented. The use of additive technologies, however, has its limitations and in order to be able to take full advantage of the opportunities they offer, a legitimate functional system should be created and embedded within proper structures to support crisis management. This paper presents the advantages and disadvantages of using 3D printers and the possibility of their implementation as part of the current crisis-response systems. The article proposes a model for incorporating additive technologies into the crisis-management system.

The needs of expeditionary forces involve the use of light-weight, short-span bridges so that their transport by air would be possible. A project which is currently developed in USA aims at the elaboration of a Composite Army Bridge (CAB) assault bridge and a Modular Composite Bridge – MCB logistic bridge. In 2004 CAB successfully underwent fatigue tests. A 14 m-long, all-composite treadway bridge span was loaded by using an MLC 100 vehicle and it withstood 20 000 load cycles. The MCB will be constructed by7 m of box modules and a 6.5 m access ramp. A 26 m-long and 4 m-wide bridge span is to provide the traffic ability of MLC 65. Furthermore, works on a 10 m-long, MLC 30 composite bridge are also developed in Canada too. The paper also presents the American concept of employing a deployable bridge system by utilising a composite structure. In order to formwork and reinforce the plate, fibre reinforced polyester composites (FRP) were used. The girder construction is made of aluminium pipes forming diamond truss with curved bottom chord. After they are integrated in the structure, the top chord nodes are connected through deck plate cast in-situ. The tests indicated that there exists the possibility of using polymer composites in military bridge construction and mobile structures of composite bridges.

The paper is an attempt to use artificial neural networks (ANN) in order to identify military load classification (MLC) of both wheeled and tracked vehicles in accordance with STANAG 2021 on the basis of the specific values of vehicle dimensions and its weight. In order to solve the problem, the authors used linear networks and a multilayer perceptron (MLP). Having analysed the MLC rating results obtained with the ANN, it has been concluded that they do not provide accuracy comparable to the one characterising analytical methods. The ANN proposed was incapable of analysing the MLC properly, in particular the MLC of those vehicles whose geometric characteristics were dissimilar to the hypothetical vehicles included in STANAG 2021 [4].