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Wooden boardwalks and footbridges are typical features in coastal areas. They often provide a safe route over rough terrain or through sand dunes. In terms of the wood construction required for such projects, you could say that footbridges are basically just long, narrow areas of wooden decking – after all, they also consist of a load-bearing substructure with weatherproof wooden boards fastened on top. When it comes to footbridges, these elements often have larger dimensions, which can mean that the wooden decking boards have a thickness of 40-45 mm.
What do I need to consider?
Like with wooden decking, the main job of the fixing screws is to secure the connections between the decking boards and substructure against lifting and shifting. With larger wooden elements, the forces that occur as a result of the wood working are also larger. Therefore, you should always plan in screws that are significantly longer and more solid than normal. Finally, screws used for outdoor projects in coastal areas are not only exposed to a particularly humid climate, but also often splash water from the sea and extremely salty air. This is an especially tough challenge for fasteners in terms of corrosion protection. Speaking of which, in addition to choosing your materials carefully, it may also require covering visible screw heads with a plastic decorative cap.