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Lesson 18: Lateral Load Path in Buildings

Lesson 18: Lateral Load Path in Buildings. D. A. C. B. 4. 3. 2. 30’, typ. 1. 20’, typ. Building Plan View. Tributary Widths. What is Tributary Width of Typical Interior Fill Beam? Answer: 5-ft

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Lesson 18: Lateral Load Path in Buildings

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  1. Lesson 18: Lateral Load Path in Buildings

  2. D A C B 4 3 2 30’, typ. 1 20’, typ. Building Plan View Tributary Widths • What is Tributary Width of Typical Interior Fill Beam? • Answer: 5-ft • If the applied pressure is 50 psf, what is distributed load w on Typical Interior Fill Beam? w = (5’)(50psf) = 250 plf

  3. D A C B 4 3 2 30’, typ. 1 20’, typ. Building Plan View Tributary Widths • What is Tributary Width of Typical Interior Fill Beam? • Answer: 5-ft • If the applied pressure is 50 psf, what is distributed load w on Typical Interior Fill Beam? w = (5’)(50psf) = 250 plf 30’ • What is the Maximum Moment M? • Answer: M = wl2/8 = (250)(302)/8 = • = 28,125 ft-lb

  4. D A C B 4 3 2 20’, typ. 1 30’, typ. Building Elevation View Tributary Widths

  5. D A C B Roof 3rd Floor 2nd Floor 20’, typ. Foundation 30’, typ. Building Elevation View Tributary Widths

  6. D A C B Roof 3rd Floor 2nd Floor 20’, typ. Foundation 30’, typ. Building Elevation View Tributary Widths • What is Tributary Width of Typical Wall Stud? Wall Stud

  7. D A C B Roof 3rd Floor 2nd Floor 20’, typ. Foundation 30’, typ. Building Elevation View Tributary Widths • What is Tributary Width of Typical Wall Stud? • Answer: 7.5-ft Wall Stud

  8. D A C B Roof 3rd Floor 2nd Floor 20’, typ. Foundation 30’, typ. Building Elevation View Tributary Widths • What is Tributary Width of Typical Wall Stud? • Answer: 7.5-ft • If the wind pressure is 20 psf, what is distributed load w on Typical Wall Stud? 30’ w = (7.5’)(20psf) = 150 plf • What is the Maximum Moment M? • Answer: M = wl2/8 = (150)(302)/8 = • = 16,875 ft-lb Wall Stud

  9. What happens when wind strikes this wall? Under the wall are “studs” (beams).

  10. What happens when wind strikes this wall? Under the wall are “studs” (beams).

  11. Wind Pressure Wind Pressure

  12. Wind Pressure Wind Pressure

  13. Wind Pressure 30’ 30’ 30’ 20’ Resultant to Roof 20’ Resultant 20’ Resultant 30’ Resultant to Foundation 30’ Wind Pressure 30’

  14. Wind Pressure 30’ 30’ 30’ 20’ Resultant 30’ Resultant to Foundation 30’ Wind Pressure At 20 psf 30’

  15. Wind Pressure 30’ 30’ 30’ 20’ Resultant to Roof 20’ Resultant 20’ Resultant 30’ 30’ Wind Pressure @ 20 psf 30’

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