Thank you. For future reference, it's confusing when your thickness and lengths of web and flange are the same value when trying to figure out how to use the equation.
Good question! Lots of things, like the shear center if a channel, can be located outside the shape, but the PNA has to be located within it. Remember that we're looking for where the full force resulting from complete yield of the material above and below the axis is balanced. If the PNA is above the top flange, then the whole section would be yielded in just tension or just compression, with no material in the opposite stress state to balance it out.
Anytime! I should add that by "within the shape", I mean within the bounding dimensions of the shape. The actual "plastic centroid" (not sure if that's a real term or not) where your x and y-PNAs intersect could be out in space for parts like a channel shape with returns on the flanges, but it will always be within the bounding box of the shape.
Ahmed, I posted a video with the solution to the example you sent. Pretty long problem, but we got there in the end: ruclips.net/video/yyYoG8dfvh4/видео.html
I have a questions about a s-shape with a channel cap. I will send it to your contact info on your web site. Enjoyed the video. It was a very good explanation.
No, I wouldn't say that. You may be able to take more accurate measurements on a ruler with millimeters than with inches, depending on the gradations (1/16" is about 1.59 mm, 1/32" is about 0.79 mm). But if you're measuring with, say, a digital calipers capable of displaying in either unit, the accuracy should be equivalent.
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Thank you. For future reference, it's confusing when your thickness and lengths of web and flange are the same value when trying to figure out how to use the equation.
is it possible that the plastic neutral axis is located outside the I beam . ex. above the top flange?
Good question! Lots of things, like the shear center if a channel, can be located outside the shape, but the PNA has to be located within it.
Remember that we're looking for where the full force resulting from complete yield of the material above and below the axis is balanced. If the PNA is above the top flange, then the whole section would be yielded in just tension or just compression, with no material in the opposite stress state to balance it out.
@@StructEdOrg thank you so much
Anytime! I should add that by "within the shape", I mean within the bounding dimensions of the shape. The actual "plastic centroid" (not sure if that's a real term or not) where your x and y-PNAs intersect could be out in space for parts like a channel shape with returns on the flanges, but it will always be within the bounding box of the shape.
I have a lot of examples need to solution. can you help me ??
Possibly, what sort of problems?
@@StructEdOrg an example but need a contact to sent it
Contact us page: (with email)
thestructed.bengordonoutdoors.com/contact-us/
Ahmed, I posted a video with the solution to the example you sent. Pretty long problem, but we got there in the end: ruclips.net/video/yyYoG8dfvh4/видео.html
thank you man :') appreciate it so much
Glad I could help, and if you have any other topics that are confusing, please let me know and I'd be happy to do more videos!
I have a questions about a s-shape with a channel cap. I will send it to your contact info on your web site. Enjoyed the video. It was a very good explanation.
Thanks Steve, I'll watch for it!
Thank you so much
No problem
thank you very much indeed
You are very welcome
Don't you loose precision with inches instead of meters
No, I wouldn't say that. You may be able to take more accurate measurements on a ruler with millimeters than with inches, depending on the gradations (1/16" is about 1.59 mm, 1/32" is about 0.79 mm). But if you're measuring with, say, a digital calipers capable of displaying in either unit, the accuracy should be equivalent.
are you forcing your voice to be deeper xD
😂 no, just cursed to have some microphones not work well for me