[EnergyPlus_Support] RE: ASHRAE 90.1 Building Envelope 'Slab-on-grade floors'

[<jeannieboef@xxxxxxxxx>]

No, no, no.

1) Slab-on-grade floor has a very specific definition in the Standard. Basement floors are normally not in this definition because they are too far under grade-level (see the band in the definition).

2) Floors in the Tables 5.5.x mean external environment exposed floors, e.g. The part of the zone floor in Level 1 which over stretches the roof of the zone underneith on the ground floor.



3) Important: Only the componants defined in the tables are regulated and as a rule of thumb, everything not regulated by the standard shall be modelled the same as the proposed case. E.g. internal floors, basement floors, internal fenestration, etc.



---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <seanking.1970@...> wrote:

Dear EneryPlus experts,
In ASHRAE Standard 90.1 2007, I am sure the term 'Floor' shown in Tables 5.5-1 through 5.5-8 means 'Ground floor' construction.
I can see in Appendix G Table G3.1 the constructions for new buildings (baseline) must use 'Floors - Steel-joist'. This table as well defines "Slab-on-grade floors shall match the F-factor for unheated slabs from the same tables (imply Tables 5.5-1 through 5.5-8)".
My question is: if 'slab-on-grade floors' also mean ground floors, to what extent (where it would most possibly be) for these constructions to apply in baseline model?
It seems for new buildings (baseline) the only required opaque constructions would be: Roofs - Insulation entirely above deck, Above-grade-walls - Steel-framed, Floors - Steel-joist and opaque doors.
I look forward to receiving any comment/advice.
Best regards,
Sean

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