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OCR for page 29
lv
SUPPLEMENTARY
INFORMATION
The basic premise underlying the conclusions and recommendations
of this report is that residential slabs-on-ground cannot be con-
sidered nor designed as an entity, separate from natural and man-
made surroundings. If maximum economy and performance are to
be realized, slab design should be interrelated with site conditions,
type of superstructure, and quality control in erection. Sites with
sensitive soils subject to volume changes, and sites in areas where
climatic conditions develop great variance in soil moisture, make
necessary the use of stiffer and stronger slabs than sites with less
sensitive soils and steadier climate. Slabs which do not support
walls and load-bearing partitions can be allowed to have larger
differential settlements than slabs which do. Also, the required
rigidity of a slab depends directly on the type of superstructure
carried, i.e., the more unyielding the superstructure, the less
differential slab settlement can be accommodated without damage
to the superstructure. Finally, the performance of the slab, in
accordance with the conditions provided by its design and/or speci-
fications, will depend greatly upon the quality of materials used.
In the pages which follow, factors which influence slabs-on-
ground performance are analyzed and procedures are set forth for
the systematic introduction of these parameters into the selection
and specification or design of specific slab types. Background
information related to these parameters, especially fundamental
information on soil behavior and quality control, appears at the
end of this report, which it Carl be referred to without causing
discontinuities in the presentation of the analytical and design
29
Representative terms from entire chapter:
systematic introduction
