Design Procedure 3

[ul92]

Good day Mates,

I am requested to prepare a Design Procedure. It would be deeply appreciated if someone gave me a hand. My main questions are:
- Where to refer?
- What are the main criteria’s that should be taken into account?

Many thanks in advance.
Ulvi.

 

[dhengr]

Ulvi:
Then, on the next half dozen different types of projects you work on, keep a detailed list of every step you take in the solution process, and in the preparation of all of the construction documents. Pay particular attention to details which you know tend to get missed, have caused problems in the past, are less obvious than the wire rope or chain tensions, shear, bending moment and axial load in a member. Maybe in the form of a very orderly check list, so the young engineers don’t miss important steps and parts of the design. Some of the items may need to be filled in and whole thing becomes part of the job file; codes to be followed, special customer requirements, general materials specs., special materials specs., specialty items and their suppliers and part #’s, etc. etc. Have several of your better engineers do the same thing, each will have a slightly different/better take on some items. Combine the best parts of each list, for a final list for a type of project. But, keep them open ended so you can add new items as they come to light. This isn’t something that you do and finalize in a few days, it’s an ongoing process.

 

[focuseng]

Ulvi:
It sounds like you are on your way then. If you are looking for examples of other company procedure manual then it may more appropriate to ask outright. However giving out proprietary manuals may not be good form. You may be best served by taking Cont. Ed. coursework on ISO-900xx whatever to really get something like what you are thinking. Like dhengr said, it needs to be flexible and fluid. Manuals can sometimes become the devil if they are too rigid or formulaic. In a former life I was "fortunate" enough to work for a manufacturing company and was charged with documenting the entire manufacturing line of one product. What you are embarking upon is a very personal (to the company you work for) adventure and potentially a full time job in itself depending on how large of a process you have. However in some cases what you have already outlined might be enough. It really is more about your company and its philosophy, organizational structure, historical precedent and future vision and risk management than what me or anyone else can tell you. Now, do what dhengr said and get to work .

______________
MAP

 

[a2mfk]

Ulvi, dude, bro,
Your second post should have been your first post, which was a non-post, which is why everyone was kinda annoyed. The more details you provide the less questions and more responses you will get.

Also, per your second post- I still am a fan of good ol' flow charts for design and analysis methodology. And I am a big fan of standardized checklists for QA/QC.

 

[tempeng]

Dear All,

I appreciate all correspondences and would like underline that questions by focuseng are being taken into consideration almost in every single design.

Most of you know that almost every companies has quality manual in order to manage and success best quality in work process. From the other hand this manual is pointed to put physical work into paperwork due to appropriate standards. My intention is the same. I am a structural engineer. I do design for steel constructions like lifting frames/ beam/containers, offshore platforms, maintenance on vessels, tanks, workshop cranes, walkway arrangements and etc. Now, as you see my job occupation is quite large to create a specific design procedure. From this point of view I am pointing to create a general procedure that could surround my job as an engineer. Let me give you a real scenario. Let’s imagine that there is a new engineer just employed by company and has been demanded to design lifting frame. Normally first he should let daylight in client’s requirements. This is what we call Minimum Design Criteria. If client requested offshore he should refer to DNV 2.7-1 and etc. If client intended this container for multiple use he should go DNV 2.22 or etc. If client intended only for onshore purposes he should go EWS D1.1 or BS and etc. In the next stage he should designate materials. Normally I prefer to run handmade calculation then design, then frame analysis or FEA and etc. Afterward to reduce amount of overdesigned materials I double run calculation with reduced properties of material….

Hopefully you understand me better know. Numerated stages above only small part of my job process and I need to put them into relevant paperwork and convert them into internal design procedure that my company or guys after me can refer to. If any question please don't hesitate.

Regards,
Ulvi.

From the way this is reading it sounds like a lot of this (regarding standards used) would be covered under "General Notes" on your company's drawings, so you could start there and expand it for the manual; perhaps with guidance on how you like things noted.

As to design procedure manuals, I'll have to second the suggestion for the ISO's. Even if you just use them for good starting point and tailor it to want you require, it'll save you a lot of time and hair pulling. I met the guys and girls that were responsible for procedure manuals in my last company and they looked like they had had all the joy of life sucked out of them so don't do it to yourself!

 

[TDIengineer]

Is he maybe asking about "Design Criteria" or "Design Basis"? For some state projects we are asked to provide a written description of the project. This written document, typically a couple of pages usually includes the following:

Description of the building, gravity and lateral systems defined.
Building Codes used.
Material Properties.
Lateral approach... Equivalent lateral or Modal Analysis..
What softwares will be used.
Soil Information, footing approach--> conventional or piles. Soil bearing values.
Design Loads - assumed floor loads, seismic mass for exterior walls, assumed equipment mass.


Anyway, you get the idea. You are basically regurgitating the general notes and your design in words.

We usually don't touch too much more on analysis methods other than lateral approach, and software / spreadsheets to be used.

Hope this helps.

 

[TDIengineer]

Ooops... Is she maybe asking..."(^^^ see post above for remainder)