Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Roof Gardens Live load

[Subject Prev][Subject Next][Thread Prev][Thread Next]

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.

> 

> -gm

> 

> 

> 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