Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

str steel bldg cost estimates - brace frame vs. moment frame

[Subject Prev][Subject Next][Thread Prev][Thread Next]
I am reviewing the design (by others) of a
steel-framed building with composite floors and brick
veneer exterior walls.  The design is at schematic

The building is approx 54,000 SF.  The cost estimate
includes the following assumptions: 12 lbs of
structural steel per SF; str steel at $2350 per ton
(=$1.18 per lb); total cost of str steel $775,500. 
The narrative assumes brace frames for the LFRS.

In the subsequent meeting brace frames vs moment
frames was discussed.  Due to architectural
constraints (braces across windows) a moment frame is
preferred by the architect; however, the str engineer
was quoted as saying that moment frames would be an
additional $150,000 to $200,000.  This is an increase
of 19% over the brace frame estimate.  I can
understand that the members would be larger (but only
in the LFRS) and the moment frame connections are more
expensive, but a 20% premium seems excessive.

Does it seem reasonable to you that the cost for
structural steel for moment frames would be 20% higher
than for brace frames?


Do You Yahoo!?
Yahoo! Health - Feel better, live better

******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at:
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*   Questions to seaint-ad(--nospam--at) Remember, any email you 
*   send to the list is public domain and may be re-posted 
*   without your permission. Make sure you visit our web 
*   site at: 
******* ****** ****** ****** ******* ****** ****** ********