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Re: EMT Properties

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About a year ago, I designed some non-structural seismic ceiling
support for an auditorium.  If you study the recommended details by
the Armstrong or City of Los Angeles, you will find the EMT are no
longer recommended by them. Ray Shreenan said that he is using it for
tensions only which may be alright.  But ceiling braces takes both
tension and compression forces.

I would agree with Jim Gataz, "Even if I knew the properties of the
tubes, from what I’ve seen of the connectors for EMT."  The way the
tube walls are welded together and the difficulties of making that
through bolt connection works made me give up on the use of EMT.  I
also try to use the light weight HSS tubes.  Again, the connections
are impossible to control.

If you have a workable connections, please share with us who have to
design the ceiling supports.



On Tue, Jun 9, 2009 at 9:37 PM, Gerard Madden, SE<gmse4603(--nospam--at)> wrote:
> Actually, this is used all the time in ceilings
> -gm
> On Tue, Jun 9, 2009 at 5:59 PM, Bill Polhemus <bill(--nospam--at)> wrote:
>> Sounds like a contractor has ton of the stuff and wants to use it in lieu
>> of stuff he'd have to buy.
>> When all you have is a hammer...
>> William L. Polhemus, Jr. P.E.
>> Via iPhone 3G
>> On Jun 9, 2009, at 6:26 AM, Jim Getaz <jgetaz(--nospam--at)> wrote:
>>         Ray,
>>                 Even if I knew the properties of the tubes, from what I’ve
>> seen of the connectors for EMT, I’m not sure I’d want to be involved in
>> using it structurally.
>>         Jim Getaz

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