P= 77 kN twtwIS.C200 x 27.9 propertiesDepth, d(mm) (mm)203AreaFlangeWidth, br (mm)WebIx(x10 mm*)ly(x10° mm*)Thickness, tr (mm)Thickness, tr (mm)(mm)355064.39.9112.418.30.82014.4W200 x 35.9 propertiesDepth, d Flangely(x106 mm*)AreaWeb(mm?) (mm)Width, br (mm)165Thickness, tr (mm)10.2Thickness, tr (mm)6.22(x10 mm*)457020134.47.62 Problem I. A steel beam cross section is assembled as shown by bolting the channel, C200 x 27.9, through its webon the wide flange, W200 x 35.9. The beam is 4 m in span and is simply supported leaded with a uniformlydistributed load of intensity 20 kN/m throughout its span and a concentrated load, P (fefer to the given table), at themidspan. If the diameter of the bolts is 22 mm,a) Compute for the moment of Inertia of the cross sectionb) Determine the maximum bending stress in the beam.c) Calculate the spacing of bolts (pitch) if the allowable shearing stress for a bolt is 100 MPa.

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Answered: a) Compute for the moment of Inertia of…

Engineering

Civil Engineering

a) Compute for the moment of Inertia of the cross section b) Determine the maximum bending stress in the beam.

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter9: Composite Construction

Section: Chapter Questions

Problem 9.8.3P: A beam must be designed to the following specifications: Span length = 35 ft Beam spacing = 10 ft ...

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Braced cuts

The braced cut is a method of providing lateral support to the soil in foundation trenches, to prevent the trenches from deformation by the caving in of soil and resisting it from moving laterally. During shallow excavation in firm soil, generally, slopes are provided to resist the caving in of soil. During shallow excavation in soft soil and deep excavation, the chances of caving in of soil increase. Hence, it becomes necessary to make a provision to resist the deformation of trenches due to caving in of soil. The braced cut is the method used for such conditions. The excavation using braced cuts is a bit uneconomical as compared to the traditional open-cut excavation method but provides better safety than the cut excavation method.

Question

P= 77 kN

tw
tw
IS.
C200 x 27.9 properties
Depth, d
(mm) (mm)
203
Area
Flange
Width, br (mm)
Web
Ix
(x10 mm*)
ly
(x10° mm*)
Thickness, tr (mm)
Thickness, tr (mm)
(mm)
3550
64.3
9.91
12.4
18.3
0.820
14.4
W200 x 35.9 properties
Depth, d Flange
ly
(x106 mm*)
Area
Web
(mm?) (mm)
Width, br (mm)
165
Thickness, tr (mm)
10.2
Thickness, tr (mm)
6.22
(x10 mm*)
4570
201
34.4
7.62

Problem I. A steel beam cross section is assembled as shown by bolting the channel, C200 x 27.9, through its web
on the wide flange, W200 x 35.9. The beam is 4 m in span and is simply supported leaded with a uniformly
distributed load of intensity 20 kN/m throughout its span and a concentrated load, P (fefer to the given table), at the
midspan. If the diameter of the bolts is 22 mm,
a) Compute for the moment of Inertia of the cross section
b) Determine the maximum bending stress in the beam.
c) Calculate the spacing of bolts (pitch) if the allowable shearing stress for a bolt is 100 MPa.

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