Answered: 25'-0" 25'-0" 10'-0" (S-1) LA 10'-0"…

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

5th Edition

ISBN:9781305084766

Author:Saeed Moaveni

Publisher:Saeed Moaveni

Chapter16: Engineering Drawings And Symbols

Section: Chapter Questions

Problem 7P

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Related questions

Question

Find the reinforcements for the mid span and supports for an interior 9 in. thick slab (S-2) in the
floor from Problem 1. Ignore the beams and assume that the slab is supported by columns only (i.e.
a flat plate). Sketch the slab and show the reinforcements including the shrinkage and
temperature reinforcement steel. Use f c’ = 4,000 psi and f y = 60,000 psi.
NOTE: Problem 3 requires additional column placements at locations such as C and D. The strip
of slab between these two columns will behave as a beam support to the one-way slab (with 10 ft.
span).

Problem 1. The figures below shows the framing plan and section of a reinforced concrete floor system.
Floor beams are shown as dotted lines. The weight of the ceiling and floor finishing is 6 psf,
that of the mechanical and electrical systems is 7 psf, and the weight of the partitions is 180
psf. The floor live load is 105 psf. The 7 in. thick slab exterior bay (S-1) is reinforced with #5
rebars @ 10 in. o.c. as the main positive reinforcement at the mid span, and #4 @ 109 in. for
the shrinkage and temperature reinforcement. The panel is simply supported on the exterior
edge and monolithic with the beam at the interior edge. Check the adequacy of the slab. Use
the ACI moment coefficients. fc’ = 6,000 psi and fy = 60,000 psi. The slab is in an interior
location.
Hint:
• Estimate total dead load. Find factored maximum positive bending moment in the end
span.
• Find design positive moment capacity.
• Compare and determine adequacy, including safety and economy.