# flexural stress

## Solution to Problem 594 | Spacing of Rivets or Bolts in Built-Up Beams

**Problem 594**

A distributed load of *w _{o}* lb/ft is applied over a middle 6 ft of a simply supported span 12 ft long. The beam section is that in Prob. 593, but used here so that the 8-in dimension is vertical. Determine the maximum value of

*w*if

_{o}*f*≤ 1200 psi,

_{b}*f*≤ 120 psi, and the screws have a shear strength of 200 lb and a pitch of 2 in.

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## Solution to Problem 593 | Spacing of Rivets or Bolts in Built-Up Beams

**Problem 593**

A box beam, built up as shown in Fig. P-593, is secured by screws spaced 5 in. apart. The beam supports a concentrated load *P* at the third point of a simply supported span 12 ft long. Determine the maximum value of *P* that will not exceed f_{v} = 120 psi in the beam or a shearing force of 300 lb in the screws. What is the maximum flexural stress in the beam?

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## Solution to Problem 592 | Spacing of Rivets or Bolts in Built-Up Beams

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## Solution to Problem 590 | Design for Flexure and Shear

**Problem 590**

A box beam carries a distributed load of 200 lb/ft and a concentrated load P as shown in Fig. P-590. Determine the maximum value of P if f_{b} ≤ 1200 psi and f_{v} ≤ 150 psi.

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## Solution to Problem 589 | Design for Flexure and Shear

**Problem 589**

A channel section carries a concentrated loads W and a total distributed load of 4W as shown in Fig. P-589. Verify that the NA is 2.17 in. above the bottom and that I_{NA} = 62 in^{4}. Use these values to determine the maximum value of W that will not exceed allowable stresses in tension of 6,000 psi, in compression of 10,000 psi, or in shear of 8,000 psi.

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## Solution to Problem 588 | Design for Flexure and Shear

**Problem 588**

The distributed load shown in Fig. P-588 is supported by a wide-flange section of the given dimensions. Determine the maximum value of w_{o} that will not exceed a flexural stress of 10 MPa or a shearing stress of 1.0 MPa.

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## Solution to Problem 587 | Design for Flexure and Shear

**Problem 587**

A beam carries two concentrated loads P and triangular load of 3P as shown in Fig. P-587. The beam section is the same as that in Fig. P-577 on this page. Determine the safe value of P if f_{b} ≤ 1200 psi and f_{v} ≤ 200 psi.

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## Solution to Problem 586 | Design for Flexure and Shear

**Problem 586**

The distributed load shown in Fig. P-586 is supported by a box beam having the same cross-section as that in Prob. 585. Determine the maximum value of w_{o} that will not exceed a flexural stress of 10 MPa or a shearing stress of 1.0 MPa.

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## Solution to Problem 585 | Design for Flexure and Shear

**Problem 585**

A simply supported beam of length L carries a uniformly distributed load of 6000 N/m and has the cross section shown in Fig. P-585. Find L to cause a maximum flexural stress of 16 MPa. What maximum shearing stress is then developed?

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## Solution to Problem 584 | Design for Flexure and Shear

**Problem 584**

A wide-flange section having the dimensions shown in Fig. P-584 supports a distributed load of w_{o} lb/ft on a simple span of length L ft. Determine the ratio of the maximum flexural stress to the maximum shear stress.

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