The sleeper was a beam laid flat on the ground. A piece of wood or stone set into the earth to carry the floor joists or the railroad tracks or the base of the wall. The sleeper was the transition between the building and the dirt. The sleeper was the first piece of wood that touched the earth and the earth was always trying to take it back. The sleeper fought the ground for the life of the building.

The sleeper was treated. You could not lay raw wood on the ground because the ground would rot it in three years. The old sleepers were charred. The carpenter burned the surface of the wood with a torch and the charcoal resisted the moisture and the rot. The char was the wood's armor. The modern pressure-treated lumber is soaked in chemicals that the ground does not like. The char was the wood defending itself. The chemical is somebody else defending the wood. There is a difference between armor you make and armor somebody puts on you.

The sleeper was level. That was the whole job. The sleeper had to be level because everything above the sleeper depended on the sleeper being level. The floor depended on the sleeper. The walls depended on the floor. The roof depended on the walls. The sleeper was the first domino. If the sleeper was wrong everything above it was wrong. The carpenter checked the sleeper with a spirit level and the bubble told the truth and the truth was either level or not. The laser level projects a line. The line is accurate. The bubble was honest. Accurate and honest are not always the same thing.

The sleeper absorbed the shock. The railroad sleeper held the rails and the rails held the train and the train hit the sleeper ten thousand times a day. The sleeper was oak because oak absorbed the blow without splitting. The concrete sleeper replaced the oak and the concrete does not absorb the blow. The concrete deflects the blow and the deflection goes into the ballast and the ballast spreads it and the ground absorbs it eventually. The oak absorbed it immediately. Absorption is mercy. Deflection is engineering.

Nobody talks about the sleeper. The building stands on the sleeper and nobody mentions the sleeper. The railroad runs on the sleeper and nobody sees the sleeper. The sleeper is under everything and above nothing. The sleeper is the foundation's foundation. The thing underneath the thing underneath the thing. Every building has one. Every building forgets about it. The forgetting is the compliment. When nobody thinks about the sleeper the sleeper is doing its job.

See also: Footing, Joist