The Slope Stability Analysis
Program (SSAP version 4.9.9 - 2019), is the first full
freeware application for LEM implementing a series of
characteristics usually available today only in
commercial software. SSAP has been developed during 28
years (1991-2019). All computational procedures have
been developed starting from published paper on LEM and
from original developments by the author.
Current SSAP release (4.9.9 - 64 bit -2019) contains
many new tools and original algorithms in order to
obtain more reliable FOS values and using a more general
approach to LEM with respect to the past.
software tool with large diffusion and use in Italy for
professionals, students, researchers, and private and
- 28 years
of development based on 100% original coding, testing,
and continuous interaction with final users with the
aims of software improvement.
original algorithms (e.g. sniff random search 2.7.1, and
2D map of local average FOS).
stability control and its reliability analysis;
groundwater and fluid pressure management module;
reinforcement structures etc.
with various type of structures: as
geogrids-geotextiles, MSEW,MSE, gabions, piles, walls,
Failure criteria Mohr-Coulomb, Tresca, Generalized
Hoek-Brown (non-linear), Barton-Bandis(1990)
(non-linear), Liquefaction: Olson -Stark.
documentation on-line (still in Italian) and many real
examples of application in natural and reinforced
applications in Italy, and some in México: case studies
with high stratigraphic, geomechanics and hydraulic
download from the WEB: http://www.ssap.eu.
freeware user’s license for any type of applications.
Dr. Geol. Lorenzo Borselli, Ph.D.*
Professor of Geotechnics and Engineering Geology
Instituto de Geologia, Fac. De Ingegneria
Universidad Autonoma de San Luis Potosì (UASLP) ,
Av. Dr. Manuel Nava 5, C.P. 78240 San Luis
S.L.P. - MEXICO
Personal web page and CV: https://www.lorenzo-borselli.eu