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The design shearing and bearing strength of an ordinary black bolt are 60 kN and 90 kN respectively. If the factored load is 360 kN, number of bolts required will be
  • a)
    3
  • b)
    4
  • c)
    5
  • d)
    6
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The design shearing and bearing strength of an ordinary black bolt ar...
Bolt value = 60 kN (minimum value of the design shearing and bearing strength)
Hence, number of bolts required = 360/60 = 6
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Most Upvoted Answer
The design shearing and bearing strength of an ordinary black bolt ar...
The given problem is related to the design of bolts for a specific load. Let's analyze the problem step by step.

Given data:
Shearing strength of a black bolt: 60 kN
Bearing strength of a black bolt: 90 kN
Factored load: 360 kN

1. Determine the required number of bolts:
To calculate the number of bolts required, we need to compare the factored load with the design strength of the bolts.

Factored load: 360 kN
Shearing strength of a black bolt: 60 kN
Bearing strength of a black bolt: 90 kN

To resist the shearing load, we divide the factored load by the shearing strength of a bolt:
Number of bolts required for shearing = Factored load / Shearing strength of a bolt = 360 kN / 60 kN = 6

To resist the bearing load, we divide the factored load by the bearing strength of a bolt:
Number of bolts required for bearing = Factored load / Bearing strength of a bolt = 360 kN / 90 kN = 4

2. Determine the final number of bolts required:
Since the number of bolts required for shearing (6) is greater than the number of bolts required for bearing (4), we need to consider the larger value, which is 6 bolts. Therefore, the correct answer is option 'D' (6 bolts).

In conclusion, to safely withstand the factored load of 360 kN, we would need 6 black bolts.
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The design shearing and bearing strength of an ordinary black bolt are 60 kN and 90 kN respectively. If the factored load is 360 kN, number of bolts required will bea)3b)4c)5d)6Correct answer is option 'D'. Can you explain this answer?
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