Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Textbook Question
Chapter 1, Problem 1.10P
Consider the meaning and purpose of the various recycling symbols shown in Figure 1.15.
a. Which are used solely as marketing tools, and which tell you what you want to know if your intent is to buy recycled materials?
b. Find and cut out a recycling
symbol from some product and attach it to your homework paper. Discuss its purpose and integrity.
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Students have asked these similar questions
Water in a tank is used to control the water pressure in a pipe as shown in Figure P5 below.
Find the pressure in the pipe at A if h = 200 mm and the mercury is at the elevation shown
(between points B and C). Assume standard atmospheric pressure and neglect the diameter
of the pipe. Express your answer in kPa.
Select a W-shape for the following conditions:
Beam spacing = 12 ft
Span length = 25 ft
Slab and deck combination weight = 43 psf
Partition load = 20 psf
Ceiling weight = 5 psf
Flooring weight = 2 psf
Live load 160 psf
Fy
= 50 ksi
The maximum live load deflection cannot exceed L/340.
Shape
Mp (ft-kips) M₁/ (ft-kips) Vn (kips) Vn/v (kips) Ix (in.
Vn/n, (kips) I. (in.)
W14 × 61
383
254
156
104
640
W21 × 44
358
238
217
145
843
W16 × 50
345
230
186
124
659
W18 × 46
340
226
195
130
712
a. Use LRFD.
Calculate the required moment of inertia, the required moment strength, and the maximum shear.
(Express your answers to three significant figures.)
Ix
=
in.
4
Μι
=
Vu
Select a shape:
-Select-
b. Use ASD.
ft-kips
kips
Calculate the required moment of inertia, the required moment strength, and the maximum shear.
(Express your answers to three significant figures.)
Ix
Ma
=
Va =
Select a shape:
-Select-
4
in.
ft-kips
kips
The beam shown in the figure below has continuous lateral support of both flanges. The uniform load is a service load
consisting of 70% dead load and 30% live load. The dead load includes the weight of the beam.
6 k/ft
+9
18'
If A992 steel is used, is a W12 × 35 adequate?
For A992 steel: Fy
=
50 ksi.
bf
h
For W12 x 35:
= 6.31,
=
36.2 in., Zx
2tf
tw
(Express your answers to three significant figures.)
a. Use LRFD.
Mu
Фомп
=
ft-kips
ft-kips
A W12 × 35 is -Select-
b. Use ASD.
Ma
=
ft-kips
Mn
ft-kips
26
A W12 × 35 is -Select-
=
+6→
51.2 in.
3
Chapter 1 Solutions
Solid Waste Engineering
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