Hardwood railway sleeper selection for heavy axle loads

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Selecting hardwood railway sleepers for heavy axle loads requires careful attention to species like oak or azobé, which offer natural density and shock resistance. I've found that treating them with creosote or copper-based preservatives is critical to prevent decay under constant pressure and moisture. On top of that, ensuring uniform strength grading helps avoid weak spots that could crack under heavy freight trains, so I always verify the supplier's testing for modulus of elasticity before p…