Blocks: Unitless vs. imperial vs. metric, vs. annotative

I am in the process of developing a library of blocks for an office that has historically drawn entirely by hand, but is now moving to autocad. Our office works in the U.S. (feet & inches) and abroad (metric). I am experienced and pretty comfortable using both measurement system.

Since I am making the blocks, and since I am the only one in the office with any kind of working knowledge of CAD, I want the new blocks to work brilliantly in both units of measure without hassle.

Is there a way to make one set of blocks that will work in both systems? Is it best to construct the blocks to be unitless? Should I be building annotative blocks?

Most of the Blocks are dynamic, so I really don't want to invest time in making multiple sets of the same thing. Also I don't want to get too far ahead and then discover I should have made them all in one scale or another, or annotative.

I understand annotative notes and dimensions, now, and can only assume that annotative blocks would work the same way.

Appreciative of any thoughts on the matter.

-Bill

ACAD 2010 LT

Parallels, iMac core i7 2.8 ghz, 12 GB Ram

set your units for each block, not unitless. There are a number of variables (INS*) that control insertion scale of blocks. When set correctly a metric block will go into a metric drawing at 1:1 but it will insert in an imperial drawing at 25.4:1. However, without the correct set up you may find AutoCAD thinking all blocks are the other size and you can find your blocks coming in 25.4 times too large or too small.

Interesting. I will need to experiment with that tonite. Thanks.