Need a book?
Engineering books recommendations...
Return to index:
Openings in concrete beams
- To: <seaint(--nospam--at)seaint.org>
- Subject: Openings in concrete beams
- From: "Gaines, David" <David.Gaines(--nospam--at)hdrinc.com>
- Date: Fri, 7 Dec 2007 13:57:22 -0600
Has anyone seen this
in practice or done concrete beam design with openings
We are working
on a new underground concrete parking structure with limited height
and overhead clearance restrictions. The footprint is large, like 600 feet
in the short direction so we need ventilation. We have 32
foot long and 63 foot long beams and 32 foot long girders. The
longer beams are governed by bending, not shear at mid-span. I
have preliminary beams designed to just fit the height. The architect is
asking us if we can put an elongated hole in the beams and girders for
ducting and pipes. These of course would be at the mid-span and not exceeding
1/3 the depth. I would prefer to use a round hole but they are asking for
elongated holes. I can't find anything in text books or literature for
designing an opening in concrete beams.
Has anyone done this
type of beam design method before? Has anyone seen concrete structures
designed with openings in the beams? Does anyone have a book or reference I can
look for to find examples or methodology?
Seems like it would
be more efficient to increase the floor to floor height and run the ducting
underneath. Any comments on this?
Any help or input
would be appreciated. Thanks,
COMPANY | Many
251 S. Lake Ave, Suite
Pasadena, CA 91101