ball park estimate
ball park estimate
(OP)
20 story reinforced conc tower, 1 million sf.
Ball park estimate for structural design? My estimate just got laughed at and I am curious...
Ball park estimate for structural design? My estimate just got laughed at and I am curious...






RE: ball park estimate
For a low end use 1/2% = $750,000.
Just a stab at it. Also depends a lot on the complexity of the building - underground garages? Complex facade? High seismic/winds? Egotistical architect?
RE: ball park estimate
RE: ball park estimate
Mike McCann
MMC Engineering
RE: ball park estimate
RE: ball park estimate
RE: ball park estimate
RE: ball park estimate
Mike McCann
MMC Engineering
RE: ball park estimate
Floors 2-19 - all the same
Roof - unique.
So in terms of detailing and gravity its almost like a 3 level structure - lateral design gets more critical and column shortening, etc. kicks in too.
RE: ball park estimate
Mike McCann
MMC Engineering
RE: ball park estimate
Are you then suggesting that $750,000 is still a good number for a low end figure?
What percentage of the architects fee's do you typically get. We target 12.5% of the architects' fee, but end up getting between 11-11.5%.
RE: ball park estimate
RE: ball park estimate
I'm not sure about high-rise office buildings - but usually an architects fee is between 6% and 8% of the total construction cost (sometimes higher).
If we use 8% and say that structural is 11% of that total (per Zweig White stats) then the structural fee should be about 0.88%.
I don't see too many fees over 1% do you?
RE: ball park estimate
And the 8% fee is the total team fee, not just the architect's fee.
RE: ball park estimate
This is not the only way to estimate though. There are two others that I use. One based on the cost per sheet, the other based on an estimation of the time expenced for each item of the design based on hourly fees with a percent for profit. For large projects, I usually look at the average of all three. For smaller ones, maybe only one.
The larger projects, in general, will have a smaller percentage of the overall fee than smaller ones, again due to repetition in the larger projects, such as high rises. There is not usually much repetition though in large commercial projects, so those look more to 1.0 to 1.5%, at least for me in the past.
God knows what the future holds though.
Mike McCann
MMC Engineering