Wide-Flange

Solution to Problem 599 | Spacing of Rivets or Bolts in Built-Up Beams

Problem 599
A beam is formed by bolting together two W200 × 100 sections as shown in Fig. P-599. It is used to support a uniformly distributed load of 30 kN/m (including the weight of the beam) on a simply supported span of 10 m. Compute the maximum flexural stress and the pitch between bolts that have a shearing strength of 30 kN.
 

Wide Flange on top of the other and bolted together

 

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

Problem 592
A wide flange section is formed by bolting together three planks, each 80 mm by 200 mm, arranged as shown in Fig. P-592. If each bolt can withstand a shearing force of 8 kN, determine the pitch if the beam is loaded so as to cause a maximum shearing stress of 1.4 MPa.
 

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 wo that will not exceed a flexural stress of 10 MPa or a shearing stress of 1.0 MPa.
 

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 wo lb/ft on a simple span of length L ft. Determine the ratio of the maximum flexural stress to the maximum shear stress.
 

Solution to Problem 575 | Horizontal Shearing Stress

Problem 575
Determine the maximum and minimum shearing stress in the web of the wide flange section in Fig. P-575 if V = 100 kN. Also, compute the percentage of vertical shear carried only by the web of the beam.
 

Solution to Problem 560 | Built-up Beams

Problem 560
The wide-flange beam shown in Fig. P-560 is strengthened by bolting two cover plates 160 mm by 20 mm to the top and bottom flanges. If the maximum flexure stress is 140 MPa, compute the total force (a) in each cover plate and (b) in each flange. Neglect the weakening effect of the bolt holes.
 

Solution to Problem 543 | Floor Framing

Problem 543
A portion of the floor plan of a building is shown in Fig. P-543. The total loading (including live and dead loads) in each bay is as shown. Select the lightest suitable W-shape if the allowable flexural stress is 120 MPa.
 

For Girders (G - 2) | Solution to Problem 542

For Girders (G - 2)

542-girder-g2.jpg$S_{required} = \dfrac{M}{f_b} = \dfrac{120(1000^2)}{120}$
$S_{required} = 1000 \times 10^3 \, \text{mm}^3$
 

For Beams (B - 3) | Solution to Problem 542

For Beams (B - 3)

542-beam-b3.jpg$M_{max} = \frac{1}{8}(20)(62)$
$M_{max} = 90 \, \text{kN}\cdot\text{m}$
 
$S_{required} = \dfrac{M_{max}}{f_b} = \dfrac{90(1000^2)}{120}$
$S_{required} = 750 \times 10^3 \, \text{mm}^3$
 

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