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Re: Roof Gardens Live load[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "szuchuan(--nospam--at)gmail.com" <szuchuan(--nospam--at)gmail.com>
- Subject: Re: Roof Gardens Live load
- From: "Erickson, Aaron A." <AErickson(--nospam--at)wje.com>
- Date: Mon, 18 Feb 2008 14:08:09 -0600
- Accept-language: en-US
- Acceptlanguage: en-US
- Cc: "seaint(--nospam--at)seaint.org" <seaint(--nospam--at)seaint.org>
Isn’t the 100 PSF LL from ASCE 7 tbl 4.1 on the roof garden not included in the effective seismic weight, wouldn’t the seismic weight just be the actual weight of the soil and plants etc…?
> This is a dead load, the fact that it is a 100psf, more or less, should
> not trigger reductions in seismic mass.
> They have garden roofs that are low profile (work in 3"-4" of soil) that
> weigh less than 35 psf when saturated.
> On Feb 17, 2008 11:36 AM, Szuchuan Chang <szuchuan(--nospam--at)gmail.com> wrote:
> > I was reading about the ASCE 7 Table 4-1 about the minimum roof loads.
> > "Roofs used for roof gardens .." 100 psf on page 13 of the book.
> > Hope that you have not miss this requirement.
> > //=====
> > In order to meet the LEED requirements (to get a SILVER) our project
> > manager insisting on adding a garden on the roof. In a SDC of "E"
> > building. In San Jose area near the bay.
> > Loads 100 psf are not reduceable for seismic design. How long will it
> > be for the building owner to recover the cost of adding extera lateral
> > capacity for a grarden on roof in Bay Area?
> > Szuchuan
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