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Thanks bkal, An indented bar ties in with the drawings. For those who are interested; the bars are 32mm dia with a M30 thread each end and used as holding down bolts for a tower. Regards, Wahmit

AM I have used MSTower for tower design but not for masts. I understand that MSTower calculates the stay length required for the specified tension (neglecting the axial shortening of the mast) so you may find the length used buried in one of the output files. If you can't find the length, you...

Hi all, Does anybody know the yield stress and ultimate tensile stress of grade HY-GK60 steel? I have not been able to find and reference to this grade but we think the 60 may refer to 60,000psi yield stress. Thanks

I am a little concerned that you need to ask the question, but hopefully I have missed something. Once you start putting guys on a structure it requires non-linear analysis, and a little knowledge and experience to avoid costly mistakes. Any suitable non-linear analysis package can be used to...

Thanks for the reply jrrs, interesting... Looking up LeftStr on my help gives; --------------------------------------- VCL Reference LeftStr Returns the substring of a specified length that appears at the start of a string. Unit StrUtils Category string handling routines extern PACKAGE...

Hi, Can anybody tell me how I can access the AnsiString functions in Borlands C++ Builder. Typically #include <vcl.h> #pragma hdrstop WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int) { AnsiString string2 = LeftStr(&quot;hello world&quot;,5); return 0; } gives the error &quot;[C++...

I to have just started using Borland (C++ Builder 6) so this may not be much use but I have found that these errors are usually associated with methods defined in the header file but not existing in the main file.

Yes you can use formulae in the function, i.e. = RndSigFigs(SUM(C1:C21),4) or even = RndSigFigs(C1/C2,INT(B1/B2)) I’ve just noticed that the RndSigFigs uses another custom function, Log10. You will also need to add this to the module. ' +---------+ ' | Log10 | ' +---------+ ' '...

BigH, The previous correspondence refers to rounding a value to a specific number; the last part of your question refers to rounding to a number of significant figures. I use the following custom function to do this; USE RndSigFigs(n,i) Rounds a number to a number of significant figures x...

Thanks ccw, The use of fine threaded bolts is a last resort, we are talking expensive bolts being installed by guys hanging on short ropes off the side of the tower high above the ground, the risk of cross threading is greatly increased. Unfortunately there is in insufficient room to install...

Whether or not you have a problem depends on the joist loading and the notch size, shape and location. Assuming a 'normal' floor arrangement then the guidance given by SteveBausch is fine. If not then; If it is a 'normal' floor arrangement and the notches are in the middle third but less than...

If it is acceptable an external pipe type flange, with stiffeners if required, would save you a lot of worry.

Whatever system you use consider corrosion of the connection inside the section, there may be no indication of failure until it's too late.

Try looking at the mast and tower codes, BS8100 in the UK, EIA222-F I think in the US. You will still need to check the buckling capacity between the 'support' points of the compression members. On the original subject an old employeer of mine refered to the tension system as x or cross...

Thanks CoryPad we are checking these materials. No can do Metalguy, the structures are existing and there is insufficient edge distance to increase the hole size. It is always worth suggesting the obvious; it's amazing how often the obvious is overlooked.

We want to strengthen the leg connections of tubular towers with flanged joints by replacing the bolts, the rest of the connection can carry the additional load. The use of grades 12.9 or 14.9 is discouraged due to the relatively low ductility and the increased risk of hydrogen embrittlement...