Voided Prestressed beams
Voided Prestressed beams
(OP)
I'm looking for suggestions on how to support (internally, if possible) some utilities (phone, cable, electric) across a proposed 50' span constructed of prestressed voided slab beams. I think I can run the conduits inside the voids, but am looking for details in the end areas. Anybody have anything they can share (e-mail or FAX details?)





RE: Voided Prestressed beams
RE: Voided Prestressed beams
The usual solution is to use a channel beam (preferably under a sidewalk), or use a spread beam solution to accomodate the utilities.
RE: Voided Prestressed beams
either way, you don't want to run a utility in the void since you'll have to tear up the beam to remove it or repair it. Most conduit is made to run under a overhang or on the side of the deck when necessary. Otherwise many DOTs use the barrier curb for conduit runs.
Regards,

Qshake
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.
RE: Voided Prestressed beams
1.) Hung off the side on brackets (typ gas or water)
2.) Suspended inside a chanel beam (any utility - cables in ducts)
3. Inside conduit incorperated into a castinplace sidewalk poured on top of the precast. (typ telephone & cable)
RE: Voided Prestressed beams
RE: Voided Prestressed beams
Zambo
RE: Voided Prestressed beams
You ambition is admirable. However, for a prestressed voided deck beam the actual primary load carry member is the "bridge deck" as you mention.
No owner in his right mind would allow a conduit to pass inside a primary concrete member and no utility worth their weight will want a conduit in a place where access is not easily attained.
Regards,

Qshake
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.
RE: Voided Prestressed beams
Zambo
RE: Voided Prestressed beams