INTRODUCTION
In 1981 “DESIGN OF SLAB-ON-GROUND
FOUNDATIONS, A Design, Construction &
Inspection Aid for Consulting Engineers” was first
published. The design procedure set forth in that
publication had at that time been in use by the
author for about 15 years. After this publication, it
was subsequently adopted by the Uniform Building
Code (UBC) as Standard 29-4(I). Copies of this
work have been distributed by WRI for 22 years
to consultants all across the nation. Feedback has
been most favorable with no comments of design
inadequacy. In a few cases there have been suggestions
that this procedure produced extra conservative
designs, but this guide is intended to always
produce a safe, serviceable foundation. Engineers
who care to are free to exercise their judgement
and to adjust the results in either direction.
SOILS INVESTIGATIONS
It is still mandatory that soils investigation be
made on any site to set out the necessary conditions
for design. The original recommendation of a
minimum of one boring for each isolated site is still
valid, but many insuring agencies have specified
at least two borings in areas where expansive clay
is found. Large sites and subdivisions will need a
specific planned program utilizing several borings.
Subdivisions will usually average about one boring
for every 3 or 4 contiguous lots. Borings should be
a minimum of 15 feet deep in most cases, and in
some instances will need to be deeper. The soils
Engineer should be sure to obtain adequate information
to cover any grading changes which can
be anticipated. Fill should be identified and noted.
Uncompacted fill placed on a site, and improper
drainage have been found to be the largest contributors
to unsatisfactory foundation performance.
Either one or both are guarantees of foundation
problems.
Please Click Bellow To Download EBOOK
DESIGN OF SLAB-ON-GROUND FOUNDATIONS
Please Click Bellow To Download EBOOK
DESIGN OF SLAB-ON-GROUND FOUNDATIONS