Issued Nov. 10, 2021
Due Nov. 17, 2021 (bring printed paper copy to class* and upload lower-resolution PDF to canvas before class)
Optional Zoom review sessions to discuss this assignment and ask any questions: Saturday, Nov. 13, 2021 11:00 am – 12:00 pm; or Sunday, Nov. 14, 2021 12:00 pm – 1:00 pm. Find Zoom invitations via Canvas.
Introduction
The Milstein Hall "as-built" drawings contain numerous errors, in some cases because of carelessness and in other cases because the project was modified after the contract documents were issued, and the "official" drawings were never revised accordingly. Go to assignment #7 on Canvas to download wall sections showing the Milstein Hall second-floor slab, glass and stone enclosure system, and aluminum soffit panels, drawn at scales of 1-1/2" = 1'-0" and 6" = 1'-0". Then watch the following three Milstein Hall construction videos to see how this part of the building was actually constructed:
Draw a single new detail section at the floor-wall intersection of Milstein Hall, at a scale of 6" = 1'-0" (or 1:2 in metric scale), similar to the mock-up shown below. On your drawing, correct the mistakes in the drawings provided by Cornell so that they represent the "as-built" conditions. Use notations, material symbols, and drawing conventions suggested by the National CAD Standard.
Label all elements in the drawing ("notations"), and provide dimensions and datum heights.
Do not simply copy "lines" from the original detail (or any other detail) unless you understand what those lines represent.
Pay particular attention to the continuity of all four control layers (thermal, vapor, rain water, and air), especially at the intersections of wall and glazing; and wall and soffit. The air-vapor-rain water control layer (which we will label as the "AIR BARRIER") has been combined as a single "rubberized" membrane applied directly over the exterior sheathing in the cavity (and rendered as a thick line); the thermal control layer consists of various types of insulation.
As seen in the Milstein Hall curtain wall video, the steel support system for the glazing is quite complex, and not a typical curtain wall. Typical symbols for materials shown in section can be found online (for example, here) or in the NCS (see Uniform Drawing System, 6.0 Symbols).
Follow the guidelines in the NCS for this type of detail section; use black only (no colors). Use appropriate line weights and font sizes. Create a title for the section as suggested in the NCS:
Format
Format the assignment on the "architectural" size "E," or 36" x 48", with a border and title block following the NCS guidelines.
Draw a single detail wall section at 6" = 1'-0" scale, but use the information shown on both the 1-1/2" = 1'-0" scale section and the two 6" = 1'-0" sections (downloaded from Canvas, Assignment 7), correcting any errors found.
Mistakes or clarifications on 6" = 1'-0" section
Datum mark should be labeled "TOP OF SLAB" or "FLOOR 02" rather than "TOP OF STONE."
Datum elevation should be reconciled with datum elevation shown on other drawing (choose either one).
Write out "CURTAIN WALL" instead of "CW."
Write "FIBERGLASS BATT INSULATION" instead of "INSULATION TYPE-4."
Write "RIGID INSULATION" instead of "INSULATION TYPE-2."
Replace "2 PART BRACKET SYSTEM" and "GROUTED ANCHOR" with angles and clip angles shown in "Part 9" video.
Write "AIR BARRIER" instead of "AB/VB MEMBRANE."
Label "EXTERIOR GYPSUM SHEATHING" shown between air barrier ("AB/VB MEMBRANE") and steel stud framing ("2-1/2" COLD FORMED METAL FRAMING...").
Use correct material symbols (see NCS or pdf linked above) for high-density spray-foam insulation, stone veneer, rigid insulation, concrete, and exterior gypsum sheathing.
Mistakes or clarifications on 1-1/2" = 1'-0" section
Delete "INSULATION TYPE 12 UNDER RADIANT FLOOR SYSTEM."
Datum elevation should be reconciled with datum elevation shown on other drawing (choose either one).
Write out "COLD FORMED METAL FRAMING" instead of "CFMF."
Replace "CONT. STEEL ANGLE" with angles and clip angles shown in "Part 9" video; revise dimensions to centerline of "grouted anchors" to correspond to modified clip angle details as shown in video (dimensions can be approximated based on video images).
Write "HIGH DENSITY SPRAY-FOAM INSULATION" instead of "INSULATION TYPE-7."
Write "FIBERGLASS BATT INSULATION" instead of "INSULATION TYPE-15."
Use correct material symbols (see NCS or pdf linked above) for high-density spray-foam insulation, stone veneer, rigid insulation, concrete, exterior gypsum sheathing, and steel beam.
Horizontal dimensions in section
The horizontal dimension between the steel "truss" centerline and the outside face of the glass or glazing (OFG) turns out to be 2'-5", as shown in this enlarged plan view. The 1-1/2"=1'-0: section is drawn correctly to scale.
*How to bring paper copy to class
Roll the 36" x 48" drawing into a 36"-long roll, not too tight, with the printed side out. Do not fold, or roll tight.
