# t-beam

## 721 Increasing the width of flange to lower the centroid of inverted T-beam

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## Solution to Problem 572 | Horizontal Shearing Stress

**Problem 572**

The T section shown in Fig. P-572 is the cross-section of a beam formed by joining two rectangular pieces of wood together. The beam is subjected to a maximum shearing force of 60 kN. Show that the NA is 34 mm from the top and the I_{NA} = 10.57 × 10^{6} mm^{4}. Using these values, determine the shearing stress (a) at the neutral axis and (b) at the junction between the two pieces of wood.

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## Solution to Problem 561 | Built-up Beams

**Problem 561**

A T section has the dimensions given in Fig. P-561. Show that the neutral axis is 3 inches below the top and that I_{NA} = 166.7 in4. If the tensile stress at the bottom of the flange is 1000 psi, calculate (a) the total tensile force in the flange and (b) the total compressive force in the cross section. Also compute (c) the moment of the compressive force about the NA, and (d) the moment of the total tensile force about the NA. (e) How does the sum of (c) and (d) compare with the total applied bending moment as computed from the flexure formula?

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## Solution to Problem 558 | Unsymmetrical Beams

### Problem 558

In Prob. 557, find the values of x and w_{o} so that w_{o} is a maximum.

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## Solution to Problem 557 | Unsymmetrical Beams

**Problem 557**

A cast-iron beam 10 m long and supported as shown in Fig. P-557 carries a uniformly distributed load of intensity w_{o} (including its own weight). The allowable stresses are f_{bt} ≤ 20 MPa and f_{bc} ≤ 80 MPa. Determine the maximum safe value of w_{o} if x = 1.0 m.

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## Solution to Problem 556 | Unsymmetrical Beams

**Problem 556**

A T beam supports the three concentrated loads shown in Fig. P-556. Prove that the NA is 3.5 in. above the bottom and that I_{NA} = 97.0 in^{4}. Then use these values to determine the maximum value of P so that f_{bt} ≤ 4 ksi and f_{bc} ≤ 10 ksi.

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## Solution to Problem 555 | Unsymmetrical Beams

**Problem 555**

A beam carries a concentrated load W and a total uniformly distributed load of 4W as shown in Fig. P-555. What safe value of W can be applied if f_{bc} ≤ 100 MPa and f_{bt} ≤ 60 MPa? Can a greater load be applied if the section is inverted? Explain.

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## Solution to Problem 554 | Unsymmetrical Beams

**Problem 554**

Determine the maximum tensile and compressive stresses developed in the overhanging beam shown in Fig. P-554. The cross-section is an inverted T with the given properties.

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## Solution to Problem 553 | Unsymmetrical Beams

**Problem 553**

Determine the maximum tensile and compressive bending stresses developed in the beam as shown in Fig. P-553.

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## Solution to Problem 552 | Unsymmetrical Beams

**Problem 552**

A cantilever beam carries the force and couple shown in Fig. P-552. Determine the maximum tensile and compressive bending stresses developed in the beam.

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