Once the tensile forces in the reinforcements are known Ti, the armatures section b · t is determined. For metallic bars or strips with allowable stress equal with:
we have:
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For geotextiles a problem that occurs in that the fabrics resistance varies from one producer to another. From available ones select one where:
(Strip length b ) · (resistance per width unit) ≥ Ti
The allowable resistance used for sizing is:
The unique safety factor (FS) is the combination of: Fsjoint, Fschemical, Fsbiological, Fsenvironmental damages
FS = Fsjoint ·Fschemical ·Fsbiological ·Fsenvironmental damages
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