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Re: When is an Architect or Engineer Required?

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We typically maintain a minimum 1/2" per foot for all our commercial
projects, otherwise the crickets end up at less than 1/4" per foot.
Otherwise, flat roofs work perfectly fine.  The problems arise when the
system is minimum slope and too soft from a deflection standpoint.

Paul Feather PE, SE
pfeather(--nospam--at)SE-Solutions.net
www.SE-Solutions.net
----- Original Message ----- 
From: "Scott Maxwell" <smaxwell(--nospam--at)engin.umich.edu>
To: <seaint(--nospam--at)seaint.org>
Sent: Thursday, July 17, 2003 10:56 PM
Subject: Re: When is an Architect or Engineer Required?


> Jim,
>
> Flat roof systems (i.e. 1/4" per foot) are a perfectly fine system and are
> commonly used on commercial buildings.  Without a doubt, roofs with
> greater slopes are much more forgiving for "mistakes" in design and
> construction, espcially when it comes to preventing water penetration.
> But, if a flat roof is properly designed and constructed (and maintained),
> then it will be perfectly fine.
>
> HTH,
>
> Scott
> Ypsilanti, MI
>
>
> On Thu, 17 Jul 2003, jim jensen wrote:
>
> > When I here of a flat roof design, I believe the
> > minimum pitch is 1/4" in 12", please correct me if
> > I'am wrong. Anywho, "They", the Architects, should
> > have stopped designing a Flat Roof system, a LONG time
> > ago. Today, Engineers should refuse to run the
> > Specification, on flat roofs, for the Achitects. Flat
> > Roof create, and will continue to create, way to many
> > headaches, primarily to those who either live or work
> > under them. I would consider nothing less than say a
> > 1-in-12. I'am well versed in residential construction,
> > but not in commercial. the concept and gravity,  in
> > this case, will always win, regardless of what a
> > person calls the structure. Jim Jensen, an unlicensed
> > residential builder.
> > --- Davis Parsons <dparsons(--nospam--at)msc-engineers.com> wrote:
> > > Bill;
> > >
> > > Last month for continuing education requirement, I
> > > took a three hour course that
> > > was a presentation by staff members of both the
> > > Architects and Engineers board.
> > > What you have described was discussed as a problem
> > > area that both boards are
> > > working on in their joint committee.  According to
> > > the staff members, a
> > > replacement-in-kind (tear-off and replace with
> > > identical product) roofing system
> > > can have anyone prepare the documents since no new
> > > loading will be imposed on
> > > the structure and the drainage path will not be
> > > changed.  However, if the new
> > > roofing system imposes additional loads or if the
> > > drainage path will change,
> > > then the services of an engineer and perhaps an
> > > architect need to be utilized to
> > > produce construction documents.
> > >
> > > Based on what you have described, I think you should
> > > contact the state boards -
> > > just don't expect any immediate reaction from them.
> > >
> > > One other thing that was mentioned was the ongoing
> > > problems they were having in
> > > the Houston area with the builders not engaging
> > > architects on condominium
> > > projects as required by law. It seems that the
> > > developers are trying an end-run
> > > around the state law stating that the projects are
> > > "single-family housing with
> > > shared firewalls" even though they look like
> > > apartment buildings.
> > >
> > > Its good to see your back on the list.
> > >
> > > --
> > > Davis G. Parsons II, PE RA AEI
> > > a practical architectural engineer
> > > in Fort Worth, Texas
> > >
> > >
> > >
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