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 DESIGN CALCULATION SHEETProject No.Date
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---16-avr.-26
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Sheet No.Computed by
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 of _
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SubjectTypical Floor RoofChecked byApproved by
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__
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Building
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DESIGN OF SECTION ACCORDING TO BS8110-1997
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Slab Basic mesh (-ve moment in guest rooms)
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SECTION TYPE
MATERIALS PROPERTIES
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FLANGED (F) or UNFLANGED (U) ?
u
CONCRETE CUBE STRENGTH (fCU)
=350
Kg/Cm2
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C
STEEL YIELD STRESS (fY)
=4200
Kg/Cm2
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T
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SECTION PROPERTIES
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TOTAL THICKNESS (t)
=70,00Cm
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WIDTH OF WEB (bw)
=25,00Cm
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EFFECTIVE WIDTH (b)
=25,00Cm
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COMPRESSION STEEL COVER (d')
=5,00Cm
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TENSION STEEL DEPTH (d)
=65,00Cm
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STRAINING ACTION
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ULTIMATE MOMENT (MU)
=58
m.t.
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MOMENT DISTRIBUTION RATIO (bb)
=0%K'=0,156
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STEEL REINFORCEMENT
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K=0,157
Compression steel is needed for flexural strength
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LEVER ARM (z)
=50,498Cm
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DEPTH TO NEUTRAL AXIS (x)
=32,227Cm
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TENSILE STEEL AREA (As)
=32,12
Cm2
COMPRESSION STEEL AREA (As')
=3,50
Cm2
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TENSION STEEL
r=1,836%
COMPRESSION STEEL
r'=0,200%
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Note:
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In Section Type, the purpose of stating if the section is flanged or unflanged is that the minimum steel area depends on
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the existence or non-existence of a flange, even if the flange is in tension.
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Thus, even if you need to design a rectangular section, it can be flanged due to the presence of a slab.
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