REV Block Position and Location...

[Superslinky]

This should be an easy one but I can't seem to find a standard...

We have a few assemblies that span multiple sheets with a REV block on both in the upper right hand corner. Is it standard practice to record changes on both sheets, just one sheet (the first) or record individual changes that might effect a sheet but not the other on each sheet???

And I suppose while I'm at it we were asked to include a distribution statement on our releases. Should that be on both sheets or just the first?

Thanks all.

 

[KENAT]

I've normally only seen details on the first sheet.

I also prefer to see most of the detail in the ECO form itself with the drawing just listing the ECO#. However, there are pros and cons both ways.

Off the top of my head I'm not sure what ASME Y14.5M says.

I will say, we revised our formats to closely match the standards a few years back and the 'continuation sheets' dont have a rev block - just the actual current rev in the title block.

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[Superslinky]

14.5M doesn't say anything as far as I can tell. Unfortunatley we have a very rough scanned in copy of the Standard.

14.35M has some info but (maybe its just me) its not very specific. For example, revs are illustrated in "circles" but it doesn't say that it HAS to be a circle, just that it can't be the same as another symbol on the sheet. It also clearly says where the rev block is located however it doesn't say anything as to if it goes on both sheets of a multi-sheet drawing.

All our examples are eons old and not very clear if they are in any standards. All our documentation is in the end for the military so standars are a must and I'm having a hard time interpretting their requests.

It seems that there are many divisions all with different standards each division follows. It seems everytime I have something right I have something else wrong.

Anyone by chance have a drawing example that meets my criteria that could be sent to me?

Multi-sheet
rev block example,
part call out example,
distribution statement
flag notes
general notes

Thank again..

 

[KENAT]

I meant 14.35 - typo on my part, sorry.

You've got me interested now. Take a look at Y14.1 Drawing Sheet Size and Format.

I don't have an up to date version, just the ANSI Y14.1-1980 which at section 9.1 says.

"Inclusion of the revision block on continuation sheets is optional"

It should be located top right.

Also Y14.100 does have some stuff. Per 14.100 Drawing notes should be on page 1, although it does allow for them to continue to subsequent sheets - look in section 4.26.

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[fcsuper]

Actually, ASME Y14.35 is clear about the use of circles on rev symbols. It says "...the revision letter...SHALL be enclosed in a circle to for the revision symbol". ASME Y14.100 states that "shall" means a requirement. When "may" or "should" are preferred suggestions.

Also, remember that generally speaking, a subject is described by what it is, not by what it is not. One wouldn't describe a horse by saying it is not an ocean. The ASME standards describe rules to follow. If it described every "not" condition imaginable, the standards would be the size of an encyclopedia set.

Under Revision Control Methods, ASME Y14.35 does describe several allowed methods to show document revisions, including the scenario mentioned by the OP.





Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion

http://groups.yahoo.com/group/solidworks & http://twitter.com/fcsuper

 

[KENAT]

fcsuper, that was my recollection of rev indicator balloons from the thread a few weeks back, but I didn't fancy looking through 14.35 again - we're kind of busy being acquired right now.

Posting guidelines faq731-376

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(probably not aimed specifically at you)
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[ewh]

fcsuper is on the ball! Y14.35M-1997 para 5.4.1 states "When a revision symbol is used, the revision letter, and the sequence number when used, shall be enclosed in a circle to form a revision symbol."

"Good to know you got shoes to wear when you find the floor." - [small]Robert Hunter[/small]

 

[fcsuper]

I've written to the ASME board to have them relax that a bit too allow for the use of other symbol shapes. I invite others to do so as well.

Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion

http://groups.yahoo.com/group/solidworks & http://twitter.com/fcsuper

 

[ctopher]

Superslinky,
You need the rev block upper-right corner, and a revision block shown within the body of the dwg that indicates the rev for each sht.
Here is a good reference:

http://mscweb.gsfc.nasa.gov/543web/files/GSFC-X-673-64-1F.pdf

Chris
SolidWorks 10 SP4.0
ctopher's home
SolidWorks Legion