5.5-5 The beam shown in Figure P5.5-5 is a two-span beam with a pin (hinge) in the center of the left span, making the beam statically determinate. There is continuous lateral support. The concentrated loads are service live loads. Determine whether a W18 × 60 of A992 steel is adequate. a. Use LRFD.
5.5-5 The beam shown in Figure P5.5-5 is a two-span beam with a pin (hinge) in the center of the left span, making the beam statically determinate. There is continuous lateral support. The concentrated loads are service live loads. Determine whether a W18 × 60 of A992 steel is adequate. a. Use LRFD.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Would a W18X 60 steel beam of A992 steel work for the figure shown.
![Problem 5,5-5a
P₁= 12k
А
+
+
14'
9.6k
Hinge
-9.66
P2 8k
c()
701
-22.4
Concentrated loads are live loads
• W18x60 A992 adequate?
Fy=50ksi
Assumption: Don't account for self-weight (based on what
Pg 8k
was told in class)
P₁= (1.6) (124)= 19.2k
P₂= (1.6) (8k) = 12.8k
P₁ = (1.6) (8k) = 12.8k
28'
+
+
+
141 14` 14` 14' 141
281
DA
6.4
-6.4
Flange:
A = 5.44
0.38√ = 9.15-2p
Web%
2=38.7 3.76 √2/Fy=90.55
So,
mn=mp=FyEx
Mn = (50ksi) (123 in)
Compact
Zx=123in²
Mn 6150 kin=512.5 kft
dmn -0.9 (512.5hft)-461.25 kft
W18x60 Mn = 46| kft](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcc4000f3-d001-4353-9cb7-6c40ac56fbbe%2Fe89dfe77-04df-47df-893f-89333a36b8db%2F4i8fzsr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Problem 5,5-5a
P₁= 12k
А
+
+
14'
9.6k
Hinge
-9.66
P2 8k
c()
701
-22.4
Concentrated loads are live loads
• W18x60 A992 adequate?
Fy=50ksi
Assumption: Don't account for self-weight (based on what
Pg 8k
was told in class)
P₁= (1.6) (124)= 19.2k
P₂= (1.6) (8k) = 12.8k
P₁ = (1.6) (8k) = 12.8k
28'
+
+
+
141 14` 14` 14' 141
281
DA
6.4
-6.4
Flange:
A = 5.44
0.38√ = 9.15-2p
Web%
2=38.7 3.76 √2/Fy=90.55
So,
mn=mp=FyEx
Mn = (50ksi) (123 in)
Compact
Zx=123in²
Mn 6150 kin=512.5 kft
dmn -0.9 (512.5hft)-461.25 kft
W18x60 Mn = 46| kft
![|6▬▬▬
FIGURE P5.5-4
brob
5.5-5 The beam shown in Figure P5.5-5 is a two-span beam with a pin (hinge)
in the center of the left span, making the beam statically determinate.
There is continuous lateral support. The concentrated loads are service
live loads. Determine whether a W18 X 60 of A992 steel is adequate.
a. Use LRFD.
A
O
12 k
-28'-
18'
B
✈
8 k
- hinge
←14--14--14--14-14-1
-28'-
с
FIGURE P5.5-5
8 k
-28'-
14'-
D
5.5-6 A W12 X 30 of A992 steel has an unbraced length of 10 feet. Using C=1.0,
a. Compute L and L.. Use the](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcc4000f3-d001-4353-9cb7-6c40ac56fbbe%2Fe89dfe77-04df-47df-893f-89333a36b8db%2Fcbd2sl8_processed.jpeg&w=3840&q=75)
Transcribed Image Text:|6▬▬▬
FIGURE P5.5-4
brob
5.5-5 The beam shown in Figure P5.5-5 is a two-span beam with a pin (hinge)
in the center of the left span, making the beam statically determinate.
There is continuous lateral support. The concentrated loads are service
live loads. Determine whether a W18 X 60 of A992 steel is adequate.
a. Use LRFD.
A
O
12 k
-28'-
18'
B
✈
8 k
- hinge
←14--14--14--14-14-1
-28'-
с
FIGURE P5.5-5
8 k
-28'-
14'-
D
5.5-6 A W12 X 30 of A992 steel has an unbraced length of 10 feet. Using C=1.0,
a. Compute L and L.. Use the
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