The simplest foundation, a padstone. Buildings and analysis and design of shallow and deep foundations pdf have a long history of being built with wood in contact with the ground.
In marine construction and bridge building a crisscross of timbers or steel beams in concrete is called grillage. Perhaps the simplest foundation is the padstone, a single stone which both spreads the weight on the ground and raises the timber off the ground. Dry laid stone foundations may have been painted with mortar after construction. Sometimes the top, visible course of stone is hewn, quarried stones. Rubble trench foundations are a shallow trench filled with rubble or stones.
Beauvais House in Ste Genevieve, Missouri, U. The concrete walls are supported on continuous footings. File:Construcción de una cimentación por zapata aislada. Slab-on-grade foundations can be reinforced mat slabs, which range from 25 cm to several meters thick, depending on the size of the building, or post-tensioned slabs, which are typically at least 20 cm for houses, and thicker for heavier structures.