Recent content by cdi12

vid071892: Using Denial’s steps I have made Excel spreadsheet – see attachment. It seems to work like a charm :-). Feel free to modify it accordingly. Additional calcs need to be added to keep X and Y scales equal. As Denial pointed out it was “an interesting little problem”. Regards, IV...

In this thread thread507-84756 "SlideRuleEra" suggested that we compare the failure load of harness parts (5,000 lb) to one measure of the failure load of the steel member (the load at 36 ksi yield strength) and "haggis" came up with C4x5.4 spanning 9 ft. Is this correct approach? For 9 ft span...

Thank you all for valuable comments. According to AISC 341-05 Commentary C11.1 OMF Knee-Brace Systems – I can design tower framing in one direction as ordinary moment frames with R=3.5. How about other direction? Any suggestions?

I am doing ASCE 7-05 seismic calculations of cooling tower support steel structure (see attachment) and I am not sure what seismic force-resisting system it is. Ordinary steel concentrically braced frame (R=3.25) or Special steel concentrically braced frame (R=6) or Steel system not specifically...

Our mechanical engineer is asking me to check circular plate made of quartz. Plate is about 14” dia and 2” thick with a lot (about 150) holes 3/16” dia. All quartz properties (E, yield, allowable tensile stress, …) were given. I am considering modeling this plate with triangular plate elements...

Try this one: =LEFT(A1,SEARCH("'",A1)-1)*12+MID(A1,SEARCH("-",A1,2)+1,LEN(A1)-SEARCH("-",A1,2)-1) ft-in text (like 6'-2" or 6'-2 1/8") is in cell A1

I have asked similar question earlier and one of answers was "Case A & B looks to be maximum variation in loading due to gusts at different times". Hope this helped. IV

Thanks RARMBJ. What requires different bolt size is different condition as you indicated.

Is it acceptable to use different bolt sizes at each end of vertical brace (3/4” dia bolts at one end and 1” dia bolts at other end)? Thanks, IV

I am checking something I do not have ASME BTH-1 with me - are all allowable stresses Fy/3 even allowable bearing stress? Thanks, IV

rtmote: Thanks for an excellent spreadsheet. If you do not mind sharing your examples on piles I would really appreciate it. Regards, IV

I forgot you use AutoCADLT and it doesn't support AutoLISP. You may try LT-Extender 2000 Plus http://www.cadopolis.com/shareware/shareware_listing.asp?TheCategory=&TheSubcategory=&StartNo=260&TheKeywords=

rharr: You have to type in both parenthesis (/ 25 25.4)

rharr: You can type in (/ 25 25.4) on AutoCAD command prompt. Will this help?

40818 - Just a little correction: (1/48)=(5/384) simplified is (1/48)=5/(8*48) Therefore equivalent UDL is 8/5=1.6 times the total load.