Some of the features of PTISlab 3.1 are:

	Design and Analysis of slab-on-ground foundations on both expansive and compressible soils.
	Calculation and analysis of uniform thickness slabs, sometimes referred to as California flat slabs.
	Analysis of a slab's capacity to support on interior line load or concentrated point load
	On-screen warning messages for out of compliance conditions.
	On-screen warning messages for elements of the designed foundation that do not meet PTI's recommendation (PTI Exceptions).
	Includes structural changes in Addendum #1 of the 3rd Edition manual.

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System requirements to run PTISlab 3.x are:

	A 486-DX or higher processor (Pentium recommended)
	32 MB of RAM (128 MB recommended)
	Windows 98 or higher
	20 MB of available hard drive space
	SVGA monitor, 800 x 600 resolution