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- เผยแพร่เมื่อ 8 ก.พ. 2025
- The best channel for structural engineering basics! Learn structural engineering and prepare for your FE PE or SE exam!
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Richard Racz PE, SE, is a Professionally Licensed Civil Engineer in the states of MA, OR, and WA and a Professionally Licensed Structural Engineer in the state of OR.
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I would say thank you on each video, i passed the PE exam and your videos helped me a lot
Stiff soil according to table 20.3-1 means Site Class D, I take it as since its says "When the simplified method is used" Use the 1.4 from that section.
yes - i looked more closely at table 20.3-1 and came to the same conclusion, although its a little weird to justify site class D just by the name of the soil and no data associated with it... but i would do exactly what you just said
@@Kestava_Engineering Thanks,
@ Question, If I have a Special steel moment frame system, do I use the steel moment frame numbers in table 12.8-2 or do I use all others? I am thinking all others.
@@sci-fimodeler1701 if you have a moment frame resisting 100% of seismic forces then you use the first option.
Thank you!
Just a question about effective seismic weight W2, why you didn't include weight of 10' wall along line B?
16 PSF *7'*10'= 1,120 lb
The final seismic base shear would be 3120 lb
@@BasimAltemimi good question! Wall weight parallel to the seismic force can be ignored because the walls weight doesn’t need to transfer up into the diaphragm because it’s already at the shear wall! You do have to account for the parallel wall
Demand once you are analyzing the shear wall tho!
@@Kestava_Engineering Thank you again! Yes, it counts only in shear walls design but not diaphragm design.
Create another video expanding on this same problem. Take the same question to the next level by designing the shear wall (assume wood) along line B. This time, use the NDS code to determine the nailing requirements and spacing.
• Is there uplift?
• Do we need a hold-down? If so, which Simpson (or another product) hold-down should we specify?
• Is the omega factor required for anchorage? Embedment depth needed to resist uplift?
This would make for an informative and engaging video that others would find valuable! For the next topic, consider diving into collector design for this shear wall, which is another crucial and interesting discussion.