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Re: Plywood diaphragms

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Where in the code are you allowed unlimited area for Type V?

----- Original Message -----
From: "Yousefi, Ben" <Ben.Yousefi(--nospam--at)>
To: <seaint(--nospam--at)>
Sent: Friday, February 23, 2001 1:56 PM
Subject: RE: Plywood diaphragms

> The only limitation on this type of construction is fire resistive
> provisions of the code, not structural. UBC allows Type-V (combustible
> construction) buildings for certain types of occupancies, up to two
> to be of unlimited area. Often the owners chose to use metal deck and
> concrete on the second floor and plywood on the roof.
> Ben Yousefi, SE
> San Jose, CA
> -----Original Message-----
> From: CDaniels [SMTP:ced(--nospam--at)]
> Sent: Friday, February 23, 2001 1:36 PM
> To: 'seaint(--nospam--at)'
> Subject: Plywood diaphragms
> Does anyone out there know if there is any code limitations to using
> a
> plywood roof diaphragm with wood or light gauge metal trusses and a
> structural steel frame?  I've never seen this done before or at
> least on a
> building this size.  I have a two story 110' by 120' steel frame
> building
> with a concrete slab on the second floor and light gauge metal or
> wood
> trusses sheathed with plywood at the roof.  The roof is a 3:12 hip.
> Any information would be appreciated.
> Christopher E. Daniels
> Larson Design Group
> ced(--nospam--at) <mailto:ced(--nospam--at)>