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RE: Green Roof Live Loads

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It is a garden roof. 


Wesley C. Werner 



-----Original Message-----
From: William Haynes [mailto:gtg740p(--nospam--at)gmail.com] 
Sent: Tuesday, November 04, 2008 5:43 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: Green Roof Live Loads

How are you defining "green roof"? Is there a garden growing on an area
of the roof or is it just utilizing solar panels (for instance) to help
achieve a Leed rating?



On Tue, Nov 4, 2008 at 4:48 PM, Wesley Werner <wwerner(--nospam--at)conewago.com>
wrote:
>     I am designing an office building with a green roof. The roof is 
> to be open to employees who want to use it for a picnic area. Can I 
> consider it a deck and use the same live load as the occupancy served 
> (50 psf), or do I have to use the provisions for roof gardens which is

> 100 psf? The 100 psf seems extreme to me since if all of the companies

> employees were on the roof, the total load would only be about  27 
> psf. (400 people x 200 lbs (conservative)/3000 sq ft). The current 
> picnic area is hardly ever used, and the only access to the area will
be stairs.
>
>
>
>
>
> Wesley C. Werner
>
>

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