(Below is the ASME's opinion on the issue)
Dear Mr. XXXX
Please see below in bold letters the personal opinion of a committee member. Please note that since this is the personal opinion of a committee member, it is not endorsed by ASME.
If you require a formal written interpretation, you...
Great post Dhengr, I agree... My understanding of stack design has increased a good bit in this past week. We so often get caught up in using templates and excel sheets that we forget we need to actually understand the math behind them.
Yes, my wording was poor in regards to table C-36. (Page...
I meant to add at the end of the bending calcs there is now no problem in satisfying the asme equation of P/A + MD/DI_section < Sbl when we use .66fy as the allow (or even .6 fy which we may do to be conservative_
Thank you all for the help and suggestions, I “believe” I have worked out a solution to the question of “what do you do when equation 4-6 is not satisfied?”
Please let me know if the following reasoning makes sense
When equation 4-6 is not satisfied design as follows.
1. Allowable...
Terio, i also had that thought... But what requirements do you check in the AISC? (its not like they have a steel stack design section)
Also, if you get a chance to review the Gaylord scan, it appears that they do have formulas for all cases of D to T.. and as i explained above, it would limit...
2nd attempt at the gaylord scan. The first did not seem to post.
BRhttp://files.engineering.com/getfile.aspx?folder=61b9c95f-157d-4e96-a15e-53328e73bfb0&file=Gaylord-Steel_Stacks.pdf
Also, see attache Gaylord and Gaylord Steel Stacks.
Notice the reference and similarities to the ASME.http://files.engineering.com/getfile.aspx?folder=b8bc44ce-ad8b-4b32-b348-68f2f0c00610&file=G_&_G_-_Steel_Stacks.pdf
Sorry for the confusion dhengr, see attached scan of the asme-sts1. Section 4.4 is what we have been discussing (in regards to design when eq 4-6 is not satisfied)
Thanks again for the help and opinions. I think you are correct about contacting ASME about this, but im still hoping im missing...
Im starting to wonder if this is an ASME issue as more sources are showing similar results/equations:
My head is spinning..
Gaylord & Gaylord, Struct. Eng. Handbook (3rd) -1990
page 30-8 (Chimneys)
Steel stacks
9. Allowable Stresses: The allowable longitudinal compressive stresses due to...
Ill write a little more later (as it has been a hectic day), but perhaps these findings may spark some of your previous knowledge on the subject. In reviewing Troitsky (Tubular Steel Structures - Theory and Design) - Section 2.6 (Allowable Stresses) i find the following. (In Regards to local...
Thanks dhengr, I can assure you the formula of t/d <= 10FY/e is not miscopied. As far as it being a misprint, i have 2006, 2003, 2000 and an earlier version at my office and they all state the same exact formula.
Your back-asswards thoughts are exactly what the senior structural guys i talked...
Yes JStephen.
Section 4.4 of the ASME STS1 is for "Allowable stresses"
The first sentance in 4.4 is as follows: "The following formulas for determining allowable stresses are applicable for circular stacks and liners provided that eq (4-6) is satisfied.
They are as follows
Case 4.4.1...
Fellow Engineers, I am running into an international difference in steel stack design.
Per the ASME, STS-1, Section 4.4, Eq 4-6, allowable stress cases are only valid when equation 4.6 is satisfied.
4-6 states that t/D <= 10Fy/E
basically, it limits your thickness based on diameter as Fy and E...
Ugggg, to use a if like this do all the items in the matrix have to be the same units of measure?
Im getting an error that units dont match when I populate the matrix with different forumals.
any ideas?
I have been looking all over the net and have been unable to accomplish something that would take 10 seconds in any programming language...HELP PLEASE
simply, I need to run multiple commands if a value is true or false.
Exampl
if H < 5
x=2
y=9
gg=567
h.3=h.9
If H > 5
x=42
y=93
gg=23567...
I have a array of 4 angles that I need to sort from lowest to highest
example
angl(4)
angl.1 = 1.305
angl.2 = 1.272
angl.3 = 1.342
angl.4 = 1.31
I need to set the array to variables for lowest to highest.
example
1st = angl.2
2nd = angl.1
3rd = angl.4
4th = angl.3
I have been messing aroudn...
Happy New year all.
I have been instructed to convert some mathcad v11 documents to v8. (I think I was awarded this task simply becasue my machine has v11 installed)
New to mathcad, and I quickly found the save as (v8) option.
My simple question is: IS there a way to tell if the sheet had...
