SAMPLE PROBLEM 1: USE LRFD The W21 x 93 beam sown in the figure must transmit a total reaction of 1,000kN to the steel base plate over a concrete column. All steels are A36 with Fy = 248MPa. The concrete has f'c = 27MPa and the allowable bearing stress on concrete is 0.3f'e. It is required to determine the size and thickness of the steel base plate. The beam has no bearing stiffeners. a) Determine the required area of base plate. b) Determine the minimum value of N. c) Determine the required plate thickness. W21 x 93 A = 17,613 mm² H = 550 mm tw = 14.7 mm b₁ = 214 mm tf = 23.6 mm k = 40.2 mm k₁ = 27.5 mm r₁ = 55.12 mm

Structural Analysis
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Chapter2: Loads On Structures
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Topic: BEAM BEARING PLATES AND COLUMN BASE PLATES - STEEL DESIGN

 

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SAMPLE PROBLEM 1: USE LRFD
The W21 x 93 beam sown in the figure must transmit a total reaction of 1,000kN to the steel base
plate over a concrete column. All steels are A36 with Fy = 248MPa. The concrete has f'c =
27MPa and the allowable bearing stress on concrete is 0.3ƒ'c. It is required to determine the size
and thickness of the steel base plate. The beam has no bearing stiffeners.
a) Determine the required area of base plate.
b) Determine the minimum value of N.
c) Determine the required plate thickness.
W21 x 93
A = 17,613 mm²
H = 550 mm
tw = 14.7 mm
bf: = 214 mm
tf = 23.6 mm
k = 40.2 mm
k₁ = 27.5 mm
r₁ = 55.12 mm
Transcribed Image Text:SAMPLE PROBLEM 1: USE LRFD The W21 x 93 beam sown in the figure must transmit a total reaction of 1,000kN to the steel base plate over a concrete column. All steels are A36 with Fy = 248MPa. The concrete has f'c = 27MPa and the allowable bearing stress on concrete is 0.3ƒ'c. It is required to determine the size and thickness of the steel base plate. The beam has no bearing stiffeners. a) Determine the required area of base plate. b) Determine the minimum value of N. c) Determine the required plate thickness. W21 x 93 A = 17,613 mm² H = 550 mm tw = 14.7 mm bf: = 214 mm tf = 23.6 mm k = 40.2 mm k₁ = 27.5 mm r₁ = 55.12 mm
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