Member
Plz help w/ important footing measurement
Please help me understand if this is the correct way to place the footing. My review of the forum info is inconclusive.
I have 5 feet from the top of the footing to the bottom of the slab.
I failed my first CD exam with minor deficiency in the vignette and did the slab this way.
I will also post my practice vignette.
Thank you for this important feedback.
Architect
As shown is correct. Bottom of the footing at the frost line is also correct.Originally Posted by cynerb
Member
NCARB is testing your knowledge of the frost line and footing depth. The MINIMUM footing depth to meet the requirement is for the BOTTOM of the footing to align with the frost line.
You may make the footing deeper than the minimum required and NCARB will tolerate some errors and give you some room to accommodate the software or human operation inaccuracy, but AT SOME POINT, if your footing is too deep, you could fail because of the footing depth.
We are trying to figure out what is the MAXIMUM footing depth allowed by NCARB to meet the requirement. Your footing may be too deep for NCARB, but no one is sure yet. See another thread:
http://www.areforum.org/forums/showthread.php?t=263317
Gang Chen, Author, AIA, LEED AP BD+C
Member
The footing depth as shown in your sketch could be the turning point when the footing depth is too deep for NCARB and solutions start to fail, or at least VERY close to the failing footing depth.
Gang Chen, Author, AIA, LEED AP BD+C
So if I understand what you are saying - Disregard real world as with most of the computer graphic divisions.
Top of Footing = Bot. Of Slab
Bot Of Footing = Frost depth
It shows it that way in the NCARB example but not in Dorf.
One more question:
Do you break the cieling at each wall? I.e. draw the ceiling for each space it occupies.
Does the slab break at the interior structural wall also? It is not drawn clearly anywhere.
Architect
Horse sh*t.
Architect
.................So if I understand what you are saying - Disregard real world as with most of the computer graphic divisions. No, ignore Gang's advice.
Top of Footing = Bot. Of Slab
Bot Of Footing = Frost depth
Top or bottom of the footing at the frost depth below grade meets the program requirements.
It shows it that way in the NCARB example but not in Dorf. NCARB examples are not perfect.
One more question:
Do you break the cieling at each wall? I.e. draw the ceiling for each space it occupies. Just like in the real world. Break the ceiling at bearing and rated walls.
Does the slab break at the interior structural wall also? It should. A bearing wall should NEVER rest directly on a slab. It is not drawn clearly anywhere.
Member
Lugnut where should the top of foundation wall start? At grade or top of ground slab?
Architect
Either way will pass.
The most common construction detail would have the top of the footing at the top of the slab (the slab is typically poured after the exterior is completed).
Testing Tomorrow.
Great thanks Lug Nut.
Wouldn't the interior partition wall also require the ceiling to break since it extends 6" above the ceiling?
How about this? What do you think?
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