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Drawing Type - Loose Hardware Assembling Definition (i.e. Ground Support Equipment)

Drawing Type - Loose Hardware Assembling Definition (i.e. Ground Support Equipment)

Drawing Type - Loose Hardware Assembling Definition (i.e. Ground Support Equipment)

I have a general question of drawing types (ASME Y14.24-2012) to be used for hardware assembly involving ground support equipment.

Basically the hardware used is designed to support and attach to an assembly or various other assemblies, but I need to define how that hardware is installed. By installing this hardware it doesn't complete an assembly, so an assembly drawing doesn't seem appropriate. The drawing type I feel that fits pretty well is an installation drawing, but that installation drawing stops there. It defines the GSE hardware to be installed and that is all that is listed in the parts list. The hardware that it is connecting to isn't listed as a parts list item, but referenced as part of the definition on how the GSE hardware is used.

Under the ASME Y14.24-2012, in the general guidelines they only talk of assemblies where installations are part of. And in the requirements they use the choice words of as applicable. One of these lines "(f) reference to the assembly drawing of the major item being installed," and the fact that the guidelines talk of a higher next assembly is causing me heartache since I have fellow cohorts saying an installation drawing is the wrong type and a more appropriate drawing type would be a Layout drawing, but that seems even more incorrect.

The general description of an installation drawing is "An installation drawing provides information for properly positioning and installing items relative to their supporting structure and adjacent items, as applicable," which seems to fit for loose GSE hardware perfectly. I have a bag of loose parts that need to be defined how to be installed.

Another comment made is that if I use an installation drawing I must create another higher level drawing to meet the requirements of an installation drawing, but I can't even fathom what type of drawing that would be since it's neither an assembly, installation, or layout drawing, maybe a drawing tree?, which again brings me back to the choice words of as applicable and in this case another higher level drawing does not seem applicable.

Anyone have any feedback on what drawing types they have seen that are generally used for installing loose hardware that doesn't end up making an assembly? (i.e. attaching a lifting bar to support hardware movement)


RE: Drawing Type - Loose Hardware Assembling Definition (i.e. Ground Support Equipment)

What that bag of loose hardware needs is an installation instruction booklet. This can show all manner of preferred installations, including any torques or protective coatings, such as dielectric grease.

Most drawings assume that the goal is one defined permanent result for which a kit of parts is problematic. However, for example, there is no installation drawing for dropable munitions on aircraft or bullets into guns. Instead the gun or the munition will come with instructions about what is appropriate to do. In the case of the gun, since it's the operator who installs the bullets, the instructions go to them. In the case of the aircraft, the instructions go to the bomb handlers.

(OK - I'm guessing on this, but I don't expect the aircraft drawing package to contain all the details of all the bombs. And I know from a sophisticated aircraft test system that had roughly 1000 interface modules that the maker of the tester had no information about installing any of the interface modules as part of the tester drawing set.)

There used to be a "kit" drawing for loose, unassembled items. it would be appropriate to include the parts, the instructions, and potentially the bag for containing them on that kit drawing.

Call out the kit in the field installation instructions.

Also - be prepared for the following. No matter what you do, there will be someone who feels that it's not right and will want something different. The worst is if they just "know" it should be different but not what exactly to do. Quite irritating.

RE: Drawing Type - Loose Hardware Assembling Definition (i.e. Ground Support Equipment)

If this is really the biggest problem you encounter in your work please send me the company name so that I can apply for a job there.

Ask yourself this question first: "Does it matter. At all?"

If you can honestly answer "Yes", them follow up with "How does my choice affect things?"

Select the choice that best complies with your company procedures, or ERP system if there is one. Or at least the choice that least breaks the system.

Simplistically, drawings need to:

Make sure the you buy the right stuff in the right quantity.
Process that stuff the way you need to.
Ship the end product out the door.

How does the "drawing type" affect those basic requirements?

RE: Drawing Type - Loose Hardware Assembling Definition (i.e. Ground Support Equipment)

@3DDave, Thank you so much for the input. That definitely sounds reasonable and doable, sadly it'll be me trying to convince someone of another document we should create. In the round about way I can just add the words installation instructions to a drawing format and push on.

As MintJulep mentioned, (Thank you @MintJulep! Your reply is exactly what I've been thinking the entire time)bigsmile, why is this such a big deal when a drawing is there to convey requirements regardless if we match to the letter or to debatable letter of some ASME document. If it gets the job done move on.
Sadly at the organization I work at we have very few processes and the ones we do have we follow very poorly.
Once in a while management grabs a hold of something and makes a big deal out of it and oddly this is the one they choose this week.

In the end they'll decide something, installation, layout, installation booklet, etc. and hopefully this will not be a debate again because they'll make a processes no one will follow bigsmile for something so meaningless in the grand scheme.
But they'll feel they have achieved something. dazed

Thanks everyone!

RE: Drawing Type - Loose Hardware Assembling Definition (i.e. Ground Support Equipment)

Quote (Me)

send me the company name so that I can apply for a job there.
Or maybe I already work there.

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