Installation or Assembly drawing?? 1

[TJK1]

I have several assemblies that never get mechanically attached to each other, but which comprise a system. Some of the assemblies are connected with data cables, but some are wireless. All together they make up a system. I need to create a drawing which calls out all of these assemblies, in some type of system level drawing. What type of drawing should it be, an Assembly drawing, an Installation drawing, or perhaps some other type of drawing? I wouldn't think that it could be an Assembly drawing, because I always thought that all components of an Assembly drawing had to be physically attached to each other. Your advice is appreciated.

 

[Finethread]

If you don't have to show details of the parts, I would use a block diagram that represents the interconnects.

 

[ewh]

I agree with you, TJK1. IT seems that this would be better as an installation drawing (which can be thought of as a top level assembly).

 

[KENAT]

We have similar issues here and my suggestion was installation drawings or possibly some kind of interface drawing, like an AEII (Aircraft Equipment Installation Information) in aerospace.

It was ignored and it's one battle I haven't pushed. Instead we'll just have an MRP bill of materials, an almost but not quite complete 3 D model (which given the lack of drawing/rev control associated I'm not sure how it will be kept up to date with our system) and foot print drawings for installation put into the manual.

I've used block diagrams (back in UK aerospace) which then referenced an interface drawing, especially for trials units/specials etc where it wasn't worth the effort of creating a true top level.

KENAT, probably the least qualified checker you'll ever meet...

 

[plmguy]

It's important to understand who will be using the drawing, and for what purpose. Does it merely identify the system components for inspection or customer acceptance? Or does it perform another function related to transportation, installation or proper connections? Each drawing type has a particular audience and/or set of applicable business rules (if not, then there's no purpose in distinguishing one drawing type from another).

Depending on your goal, you may want to consider these as candidates:

Assembly drawing: Depicts the assembled relationship of (a) two or more parts, (b) a combination of parts and subordinate assemblies, or (c) a group of assemblies required to form an assembly of higher order. It shall contain sufficient views to show the relationship between each subordinate assembly and parts in the assembly
depicted.

Arrangement drawing: Depicts in any projection or perspective drawing technique, with or without controlling dimensions, the relationship of major units of the item depicted.

Installation drawing: Shows the installed and assembled position of an item(s) relative to its supporting structure or to associated items.

Combination of adopted items drawing: Depicts the items constituting a combination of items and assigns a unique identification number to the combination. The drawing serves as the basic document for assignment of a stock number to the combination.

Package content drawing: Provides package part number and appropriate pack nomenclature for stock identification
of material packaged for convenience of handling, storage, issue, or functional selectivity in logistic support operations. Package content drawings are prepared for that packaging which constitutes a synthetic grouping or combination of items, which in themselves do not constitute a functioning, engineering, or production assembly.

Interface control drawing: Depicts physical and functional interface engineering requirements of an item which affect the design or operation of co-functioning Items. These drawings are used as design control documents, delineating interface engineering data coordinated for purpose of: (a) establishing and maintaining compatibility between co-functioning items; (b) controlling interface designs thereby preventing changes to each item’s requirements which would affect compatibility with co-functioning sub-systems; (c) communicating design decisions and changes to participating activities.

Transportability drawing: Contains data that will assist in preparing an item or major system for shipment.


For each drawing type's requirements, see ASME Y14.24 or MIL-STD-100.

- Ed

 

[KENAT]

You're not wrong plm guy, the OP should take a look at 14.24 (or maybe the milstd) and see what he thinks will work based on the application.

And remember, while it's not to be done lightly, you can combine drawing types on a single drawing.

KENAT, probably the least qualified checker you'll ever meet...

 

[ewh]

Good clarification, plmguy.

 

[TJK1]

I appreciate everyone's help. I have ASME Y14.24-1999, not the 2004 version and did not see "Combination of adopted items drawing", "Package content drawing", or "Transportability drawing". Were these drawing types added as part of the 2004 revision to the Y14.24 spec.?

 

[KENAT]

It was reaffirmed in 2004, my copy says 'reaffirmed in 2004' and doesn't have those types.

I wonder if they were in the/a mil-std.

KENAT, probably the least qualified checker you'll ever meet...

 

[plmguy]

Yes, I got them from MIL-STD-100F (they were dropped from G).

- Ed