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Re: So-Cal bar joists

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As a southern CA engineer, I am not in agreement with the premise that bar
joists are not used here.  If K series type trusses are considered bar
joists, they are used frequently.  Most tilt-ups will utilize a hybrid
system of steel trusses and wood sub-purlins with plywood decking, in a
panelized roof arrangement.  The traditional glulam purlin panelized system
is not as common as it once was. Trus-Joist open web series bar joists are
not uncommon.  On low-rise steel buildings standard W flange sections or
steel trusses with metal deck are not uncommon, or a hybrid system as
outlined above.

If anything, I would say most So-Cal contractors have a preference for
plywood over metal decking for low-rise roof systems.  There is a local
attitude that wood systems are less expensive than metal deck roof systems.
This is an out-growth of the traditional cost savings associated with
panelized roof systems on single story structures.  I do not always agree
with this line of thinking.  I feel that many contractors are blinded by an
elemental approach to estimating (ply is less per sq. ft. therefore
cheaper...) rather than an overall system cost analysis, but that is an
entirely new discussion.


Paul Feather
----- Original Message -----
From: "Rick Burch" <rburch(--nospam--at)conterra.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Thursday, September 21, 2000 5:36 PM
Subject: Re: Good Ol' Todd Hill (Re: bar joists)


> sscholl2(--nospam--at)juno.com wrote:
> >
> > One does not have to be young  to not know about bar joists. They are
not
> > used in certain parts of the country. I have not used one for more than
> > 40 yrs. They are not used that I know of in California for example.
> >
> > Stan Scholl, P. E.
>
>
> Wow, I never knew this. Here in the southeast, most low-rise steel
> buildings use bar joists and metal deck for the roof structure, unless
> there is some reason to use a slab. What do you use for the roof
> structure on, for example, a one or two story steel framed building?
>
> Rick Burch
>
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