1. Standard concrete foundation walls and footings (2'-0" below grade) with crawl space (no basement);
2. Non-habitable attic under steep-sloped roof;
3. At least one window or door opening;
4. One cantilevered floor area, either inside (e.g., a balcony overlooking a double-height space); or outside (e.g., the first and/or second floors extending outward beyond the stud or foundation wall beneath) -- note that any cantilevered joist or girder should extend no more than about 1/4 beyond its primary span;
5. Model can be a fragment or section of a larger structure, as long as it contains, and clearly shows, all required characteristics.

Requirements:

1. Suggested scale: 1/2" = 1'-0". Neatly label drawing or model with your name(s), and "Assignment #3, Fall 2006." Labeling of building elements is optional.
2. Model can be either built with bass/balsa wood studs, joists, and rafters (with chipboard for all other elements: foundations, wall sheathing, plywood subfloors); or drawn as a 3-dimensional image. In either case, use "cut-away" technique to reveal otherwise hidden construction: reveal things like studs, joists, girders, posts, rafters, sill and top plates, arrangement of studs/joists at openings in walls or floors, foundation wall, footing, drain tile, etc. In no case should plaster or concrete be used for modeling footings/foundation walls; build these elements with chipboard. In no case should any "solid" material such as soil be modeled with a solid material: again, use chipboard, paint, etc.
3. Drawings must be done individually; models may be done in groups of no more than 3 students.
4. Assume wood-framing consisting of 2x4 or 2x6 stud walls and 2x10 or 2x12 joists and rafters at 24" o.c. Girders can be assumed to consist of double or triple 2x10s or 2x12s; they should be supported by double or triple 2x4s or 2x6s, even when those built-up posts are "hidden" within a stud wall. Note that for built models at this scale, wooden elements can be approximated with 1/16"-thick bass/balsa wood (1/4" wide for studs; 1/2" wide for joists).
5. Follow standard guidelines for wall, floor, and roof framing (see references).
6. Showing non-structural elements is optional: these include roofing, siding, interior finishes and trim, insulation, and vapor retarders. It may be useful, however, to include interior finish surfaces in order to reduce the amount of wood framing shown (or used) in the model. In no case should actual fiberglass insulation be used; model with cotton, paper, etc.
7. Try to make the model or drawing as small as possible, but big enough to show all required elements in context, so that the building or building fragment is understandable as "structure" and "construction." Showing model in context means including a bit of the adjacent site, so that the foundation system is shown in relation to grade.
8. Drawings must be flat, not rolled. Consider mounting on board if necessary to maintain flatness.

• Text, chapter 5 (Wood-frame construction)
• See other references on course reserve, especially, Ching, Thallon, and Allen's Architectural Detailing (pp.179-212); and, of course, Architectural Graphic Standards (permanent reserve).
• Images of previous student models from a similar assignment are online from Fall 2003.
• See sketch of wood-frame structure and cut-away sketch showing various building elements.