Hey Richard,

You did not specify, and I assume that you were interested in smaller
than this, but I stumbled across the following in a small handbook I
picked up the other day, called "IPT's Metal Trades Handbook". It
was in the section on Structural Steel

___________________________________
Safe Edge Distances for Holes In Structurals
----------------------------------------------------------------------
Hole size | Edge Distance
9/32 | 3/8
11/32 | 1/2
7/16 | 5/8
9/16 | 7/8
11/16 | 1-1/8
13/16 | 1-1/4
15/16 | 1-1/2
1-1/16 | 1-3/4
--------------------------------------------------------------------
Table #64. Structural Edge Distances

Take care.

Brian Lawson,
Bothwell, Ontario.

ps.......DID you find what you wanted, and if so, where?



XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
On Sun, 19 Feb 2006 02:55:16 GMT, Richard Lamb
wrote:

David Merrill wrote:
Try he http://trs.nis.nasa.gov/archive/0000...1/asm-B200.pdf

Or, if desperate to the point of spending money, he
http://www.aiaa.org/content.cfm?page...97&g ID=45326


David Merrill



I followed the NASA link. It _may_ answer the question -
if I can interpret it correctly?

Thanks, David. That was quick too!

Richard

"Richard Lamb" wrote in message
. net...

I apologize for an actual on-topic post but I'm stumped.

I once had an old engineering book that had info on edge margins for
holes.

The edge margins for thin sheet are well known and easily found,
but I'm having no luck locating the tables for Lugs.

As I best recall the difference is the relative thickness of the
metal being bolted or riveted.

Can anyone help me out here?

Richard