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Engineers worldwide use spMats (formerly pcaMats, MATS) to optimize
complicated foundations design, reinforcing and soil-structure interaction.

spMats, formerly pcaMats/MATS, is a program for analysis and design of
concrete foundation mats, combined footings, and slabs on grade. The slab
is modeled as an assemblage of rectangular finite elements. The boundary
conditions may be the underlying soil, nodal springs, piles, or
translational and rotational nodal restraints. The model is analyzed
under uniform (surface) and concentrated loads. The resulting
deflections, soil pressure (or spring reactions), and bending moments are
output. The program computes the required area of reinforcing steel in
the slab in accordance with ACI 318-14/11/08/05/02 and CSA
A23.3-14/04/94. The program also performs punching shear calculations
around columns and piles.

spMats uses the plate-bending theory and the Finite Element Method (FEM)
to model the behavior of the mat or slab. The soil supporting the slab is
assumed to behave as a set of one-way compression-only springs (Winkler