[Bldg-sim] multiple wall constructions for LEED

[Kendra Tupper]

In Table G3.1 (#5 Building Envelope) of 90.1-2004, it says that:

³Opaque assemblies...shall conform with the following common, lightweight
assembly types and shall match the appropriate assembly maximum U-factors in
Tables 5.5-1 through 5.5-8:
* Roofs ­ Insulation entirely above deck
* Above grade walls ­ steel framed
* Floors ­ Steel joist²

So every baseline wall should have the assembly max U-factor for a
steel-framed wall. This also allows credit to be taken for having mass walls
in your proposed design.


On 8/11/08 3:20 PM, "Chien Harriman" <chien.harriman at iesve.com> wrote:

> Hi all-
>  
> A quick, but kind of hazy question for me at least, regarding LEED projects.
> Let's just say, that a building is composed of multiple wall types, spanning a
> range of the ASHRAE 90.1 definitions...some portions of the building is steel
> framed, another portion is mass wall, and yet another portion is wood framed,
> for example.  In this case, what would the baseline be defined as?  Does each
> wall remain categorically intact, and you simply choose the baseline U-factor
> that corresponds to that wall type, or do you have to determine the wall type
> that makes up the majority of the proposed building, and choose this wall type
> as the baseline wall type?
>  
> Thanks in advance,
> Chien
> 
> 
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