The flooring of a warehouse is made up of double-tee joints (DT) as shown. The joists are simply supported on a span of 7.5 m and are pre tensioned with one tendon in each stem with an initial force of 745 kN each, located at 75 mm above- the bottom fiber. loss of stress at service load is 18%. a=2.4 m 88 NA. 192 267 75 Load imposed on the joists are: (See loadings) 10 kN/m B 7.5 m

Structural Analysis
6th Edition
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Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Properties of DT:
A = 200.000 mm?
• | = 1880 x
10 mm4
• Y: = 88 mm
• Yb = 267 mm
%3D
• a = 2.4 m.
What additional superimposed load in
kN/m can be DT carry such that the
resulting stress at the bottom fibers at
midspan is zero.
Transcribed Image Text:Properties of DT: A = 200.000 mm? • | = 1880 x 10 mm4 • Y: = 88 mm • Yb = 267 mm %3D • a = 2.4 m. What additional superimposed load in kN/m can be DT carry such that the resulting stress at the bottom fibers at midspan is zero.
The flooring of a warehouse is made up
of double-tee joints (DT) as shown. The
joists are simply supported on a span of
7.5 m and are pre tensioned with one
tendon in each stem with an initial force
of 745 kN each, located at 75 mm above
the bottom fiber. loss of stress at service
load is 18%.
a=2.4 m
88
NA
192
267
175 mm
Load imposed on the joists are: (See
loadings)
10 kN/m
B
7.5 m
Transcribed Image Text:The flooring of a warehouse is made up of double-tee joints (DT) as shown. The joists are simply supported on a span of 7.5 m and are pre tensioned with one tendon in each stem with an initial force of 745 kN each, located at 75 mm above the bottom fiber. loss of stress at service load is 18%. a=2.4 m 88 NA 192 267 175 mm Load imposed on the joists are: (See loadings) 10 kN/m B 7.5 m
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