The supporting structure of the billboard is attached to the ground by a pin at B, and its rear leg rests on the ground at A. Friction may be neglected. Point G is the center of gravity of the billboard of the structure, which together has a mass of 14?. The wind load on the billboard is ? = 1500 ?⁄?. To prevent tipping over in high winds, a 1500 ?? mass is placed on the structure near A as shown in the figure. Determine the following: (a) the diameter of the pin at B for which the allowable shearing stress in the pin is 100 MPa, (b) the corresponding bearing stress in the bracket at B.
The supporting structure of the billboard is attached to the ground by a pin at B, and its rear leg rests on the ground at A. Friction may be neglected. Point G is the center of gravity of the billboard of the structure, which together has a mass of 14?. The wind load on the billboard is ? = 1500 ?⁄?. To prevent tipping over in high winds, a 1500 ?? mass is placed on the structure near A as shown in the figure. Determine the following: (a) the diameter of the pin at B for which the allowable shearing stress in the pin is 100 MPa, (b) the corresponding bearing stress in the bracket at B.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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The supporting structure of the billboard is attached to the ground by a pin at B, and its rear leg rests on the
ground at A. Friction may be neglected. Point G is the center of gravity of the billboard of the structure, which
together has a mass of 14?. The wind load on the billboard is ? = 1500 ?⁄?. To prevent tipping over in high
winds, a 1500 ?? mass is placed on the structure near A as shown in the figure. Determine the following: (a)
the diameter of the pin at B for which the allowable shearing stress in the pin is 100 MPa, (b) the corresponding
bearing stress in the bracket at B.
Transcribed Image Text:q N/m
5 m
// \\
9 mm
+ 0.75 m
4 m
1200 kg
В
Pin
B
0.75 m
-3.5 m-
5 mm
Bracket
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