This invention relates to a typical beam for all kind of traffic routes, especially for magnetic float rail (MSB), for example TRANSRAPID, containing the precast unit railway beam arranged in the site-poured-concrete or the precast-unit manner produced understructure, which includes at least a hollow reinforced stress-concrete long beam, through which the railway plate extends at both sides, wherein the stress-concrete-carrier-tube of the stress-concrete long beam produced in the spun-concrete manufacturing method, containing the produced flat over-covering shoulder used as the separate member, which forms the railway plate traversing across the railway.
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