Still unclear what you are doing in general.
Can you explain more of what you mean by the word "
Grid" as there are several ways to use it. It sounds like what you are talking about is NOT the typical use of the word. As Van said it sounds like you are talking about hanging a
pipe grid or possibly dead hanging pipes from the ceiling. The most common use of the word "
grid" refers to a part of a theater building with a fly
system. It is a steel
grid (little rectangles about 1"x3"), mounted around 7 feet or so from the
top of the fly space. Permanently built into the building, the
grid supports and/or allows access to all the cables and pulleys of the fly
system. You can go up and walk around on this
grid to repair and maintain your fly
system or it can be used for rigging. You don't hang lights from it as it's typically more than double the height of the
proscenium arch and it has no pipes or attaching points... it's little steel rectangles for walking on.
Is this a class project?
Are you trying to design something that will actually be installed?
If you can post pictures or drawings of what you are trying to do that is always helpful.
I'm sure we can help you but we need a little more information.