4.0 Vignette: Checklist

Structural Layout Vignette and Multiple Choice

4.0 Vignette: Checklist

Postby youngck » Sat Feb 10, 2018 6:28 pm

This is my first try at the 4.0 vignette. It took about 9 minutes, including checking my final solution, so I am wondering if I've overlooked anything important.

The checklist I used was:
***Use a post-and-beam structural system***
***Start with upper roof, then go to lower roof***
1. Columns at all corners
2. Columns spaced no more than about 40'-0" (max. recommended beam span)
3. Columns at upper level continuous down to lower level (all upper floor columns redrawn on lower level)
4. Beams drawn under clerestory
5. Beams drawn at all walls shared between upper and lower floor
6. Joists span in short direction, spaced at 48" o.c. with max. span about 30'-0" (drawn at centerlines of columns)
7. All Beams and Joists are supported at both ends (beams only supported by columns, joists supported by beams or columns)
8. No beam-to-beam connections (all beams terminate at a column)
9. Roof decking spans perpendicular to joist span (drawn at centerlines of columns, same as joists)
10. No beams drawn only to provide lateral stability (seismic and wind not a factor)

Note: At the covered entry, the joists span in the long direction because beams were already in place from the framing of the bays to the north and south.

Any comments will be helpful. Thanks!

Upper Level.jpg

Lower Level.jpg
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Re: 4.0 Vignette: Checklist

Postby annascherman » Mon Feb 12, 2018 9:48 pm

Coach,

Everyone seems to agree that there must be a beam drawn under the clerestory. Where in the program does it state this? Also, is the beam in this solution necessary between the common area and the covered entry (on the lower level)?

Thanks!
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Re: 4.0 Vignette: Checklist

Postby Coach » Mon Feb 12, 2018 10:31 pm

annascherman wrote:Everyone seems to agree that there must be a beam drawn under the clerestory. Where in the program does it state this?

When it says "structure must accommodate" that's how I choose to interpret it.

Also, is the beam in this solution necessary between the common area and the covered entry (on the lower level)?

Yes.
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Re: 4.0 Vignette: Checklist

Postby annascherman » Tue Feb 13, 2018 11:13 am

Ok. Can you explain why the beam between the common area and covered entry is necessary? Is it because of the double height space? Or does it have to do with the covered entry?
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Re: 4.0 Vignette: Checklist

Postby Sparky83 » Tue Feb 13, 2018 1:13 pm

annascherman wrote:Ok. Can you explain why the beam between the common area and covered entry is necessary? Is it because of the double height space? Or does it have to do with the covered entry?

NCARB doesn't know how to frame a building. In their world, the covered entry roof interrupts the 2-story wall on the east end of the common area. Since a roof cannot support a wall, they require a beam or bearing wall. In the real world the lower level wall would support the upper level wall. Welcome to NCARBland.
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Re: 4.0 Vignette: Checklist

Postby annascherman » Tue Feb 13, 2018 6:42 pm

Got it. Thank you!
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Re: 4.0 Vignette: Checklist

Postby rhettm » Sun Feb 25, 2018 12:03 pm

Sparky83 wrote:
annascherman wrote:Ok. Can you explain why the beam between the common area and covered entry is necessary? Is it because of the double height space? Or does it have to do with the covered entry?

NCARB doesn't know how to frame a building. In their world, the covered entry roof interrupts the 2-story wall on the east end of the common area. Since a roof cannot support a wall, they require a beam or bearing wall. In the real world the lower level wall would support the upper level wall. Welcome to NCARBland.


So a beam is basically needed at any intersection between a lower roof and upper wall regardless of whether needed for joists to bear? Guess Dorf was wrong there - he says opposite in his video
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Re: 4.0 Vignette: Checklist

Postby steveds31 » Tue Apr 03, 2018 1:52 pm

Sparky83 wrote:
annascherman wrote:Ok. Can you explain why the beam between the common area and covered entry is necessary? Is it because of the double height space? Or does it have to do with the covered entry?

NCARB doesn't know how to frame a building. In their world, the covered entry roof interrupts the 2-story wall on the east end of the common area. Since a roof cannot support a wall, they require a beam or bearing wall. In the real world the lower level wall would support the upper level wall. Welcome to NCARBland.


Shouldn't a beam be required then within the lower level southwest common area wall?
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Re: 4.0 Vignette: Checklist

Postby Coach » Tue Apr 03, 2018 1:55 pm

steveds31 wrote:
Sparky83 wrote:
annascherman wrote:Ok. Can you explain why the beam between the common area and covered entry is necessary? Is it because of the double height space? Or does it have to do with the covered entry?

NCARB doesn't know how to frame a building. In their world, the covered entry roof interrupts the 2-story wall on the east end of the common area. Since a roof cannot support a wall, they require a beam or bearing wall. In the real world the lower level wall would support the upper level wall. Welcome to NCARBland.


Shouldn't a beam be required then within the lower level southwest common area wall?

No. What's it going to carry?
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