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.

Structural Analysis
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Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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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
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
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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