The article contains the description of an efficient lightweight steel-reinforced concrete bridge superstructure. which includes metal blocks with a box-like section and reinforced concrete efficient roadway slab. Metal blocks are made of sheet perforated elements manufactured according to the no-waste technology. The blocks are interconnected as a single space bridge superstructure f... https://foldlyers.shop/product-category/usb-type-c-hubs-and-card-readers/