Re: diagrams for stair platforms

Thomas:

Thomas V wrote:
> Did you consider using DDD or Feature modeling and linking to the 
> spreadsheets?
> 



DDD.  . . . . . .  Isn't that dimension driven cells?

I've never used DDD. From the little I know I think that could work, and 
in large industrial and process mfg. projects the number of modified 
cells for stair ramps would be nearly 100%. Far less for inhabited 
buildings.

Can you outline a way to construct a DDD cell for that purpose?

For a 2D elevation drawing of the side profile the main numbers to enter 
would be the fin. floor-to-fin. floor distance, or FFD. For ramps of 
known numbers of risers, the fin. elev.-to-fin. elev. distance, or EED. 
Landing depth could also be entered.

What is feature modeling? How does one link model features to a 
spreadsheet? Would the entire stair structure considered as a 2D or 3D 
model be a single data driven cell?

Once a stair general design has been established the advantages of the 
linked model would be in the automation of the modifications. That would 
pay for itself in the first 100% change of elevation heights. Making 
drawings one at a time in scratch style would mean that both the 
calculations and the drawing would have to be changed for each revision. 
That's weeks of work at a probable rate of $4k per week not to mention 
that the job captain has to check everything at an even higher rate and 
order scratch revisions further raising the cost.

Thanks for the information.

Ralph Hertle