ARCH2331, Building Technology 2, Resources

Question:
I’m having trouble with scaling my wall section details. I figured out the multiple viewports part but for example, The cantilever is perfect at 1:16, too big at 1:10, and too small at 1:20. The window Details is Perfect at 1:20, but 1:16 also works.

Response:
It is a good idea to keep your scales constant if you are able to line the might neatly in the detail sheet. Break the cantilever into two separate details one showing how it works where it intersects the wall below and one where it shows how the cantilever wraps around its protruding corner. For your details 1:10 (1 1/2″=1′-0″) is the least details you should scale use. I recommended to the class that they use 1:5 (3″= 1′-0″). 1:16 (3/4″=1′-0″ it is used in Imperial scale system) is not used in the profession and can cause problems in real projects 1:20 is sometimes used but that is not detailed enough of the scale to convey all the information you need in your details.

Common Drawing Scales equivalent:
“Soft” (rough) scale conversion

Question:
I had a question about the thickness of the batt insulation in the roof. You asked us to make it thicker than our deepest joist, in my case 220. However, I am not sure what can hold it. For example, the image I attached shows that the joist is flush with the slant of the roof, if I give ore space for insulation what can I add so there wouldn’t be a gap above the joist? Double studs (47×75)? If so, how far should I space them from the joist?

Response:
See the attached sketch in particular the parts labeled A, B, C, and D.
Because roofs tend to be the surfaces you lose most of your conditioned air it is the area that should have the most insulation if possible. The overall insulation area should be equal or greater (B>A) to achieve this you can put your roof furring strips (D) at a distance from your rafter. To support your roof furring strips you can use 18mm OSB or plywood (C) to connect them to your rafters.

Question: I was trying to calculate the beam to use in my building. Can you check the attachment to see if it’s correct?
Answer: Yes, that works with the table Architect Studio Companion

Question: I also need help with finding the width of the beam.
Answer: A beam with is from 2 to 7 times smaller than its depth depending on the beam length. In your example dividing the death by three would equal roughly 5.25” would be a good estimation.

Question: Is it okay if my exterior walls for the Cooper Residency are 13” thick and the interior ones 6”?

Response: Yes, 13” is a good estimation of what a high performance wall might equal. Interior walls are typical typically just under 5” (4-3/4”) so that is a good number to work with.

A good start, I can review drawings online during class.

some quick thoughts on improvements:

• you should add a heavy weighted that line indicates the ground level.
• the lines of your cantilever are too heavy
• you should add elevation markers to show the relative Heights of the building
• You do not want to use multiple lines for the curves
• Give at least 8 inches of thickness to your slope roof
• With a dash line you can add the outline of the Cellar level

The 6:00 PM Building Technology II class will connect today via Blackboards distance learning tool, see the announcement on blackboard. The Blackboards announcement contains a link to the video conference.

Per CUNY requirements we will be switching over to a line format over the next few days. Today during class time, we will be utilizing online applications. Class will not meet in our classroom, we will be working on line.

We will be utilizing the following platforms:
Blackboard
OpenLab
ZOOM
Dropbox
Google documents

Be sure to Post your draft elevation included the added sloped roof up to blackboard to receive feedback and comments.

Under: Content -> Project B [High-performance House] -> B03 [Draft] elevations

Try this link now [Thursday 3:40 PM]: https://zoom.us/j/4681523648

If you’re unable to Connect via the video link: You may use this discussion board to communicate.

(this schedule is subject to change)

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