Show in the attached figure is a typical interior span of a
floor beam spanning between the girders at locations A and C. Partition walls, which may be damaged by
large deflections, are to be erected at this level. The interior beam shown in the attached
figure will support one of these partition walls. The weight of the wall is included in the
uniform dead load provided in the figure.
Assume that 15 % of the distributed dead load is due to a superimposed
dead load, which is applied to the beam after the partition wall is in
place. Also assume that 40 % of the live
load will be sustained for at least 6 months.
Fc = 5000 psi, fy = 60 ksi.
Part I
Determine whether the floor beam meets the ACI Code maximum
permissible deflection criteria. (Note:
it will be assumed that it is acceptable to consider the effective moments of
inertia at location A and B when computing the average effective moment of
inertia for the span in this example.)
Part II
Check the ACI Code crack width provisions at midspan of the beam.
Serviceability Example
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