Physical Systems in Building // Structures

Understanding Buildings, Ch. 2: Enclosure

NB: summaries on pp 43, 49, 52, 58, 65, 70

Fall Quarter students should re-read some sections of Sunspots which are relevant to this material: at least pp 8-20, 38-54

TERMS:

AND SOME USAGES FROM BRITISH ENGLISH

"draught" = draft (and is pronounced the same way)

"topping screed" : thin layer of concrete laid on top of a more roughly laid slab

"vapour" = vapor (and is pronounced the same way)

"shuttering": called ‘formwork’ in the U.S., this is the assembly of panels, usually wooden, into which concrete is poured and which holds it in the desired shape until it stiffens enough to stand on its own.

We will take up some of the differences between British and American construction in lecture.

STUDY QUESTIONS

§ notice the very great emphasis on controlling water. As you study the sample wall sections, ask yourself which features are primarily structural, which are primarily for water control, which have some other function, and which serve multiple functions.

§ in Figure 2.13, where in each wall section will condesation occur, and why there?

§ spend time with each of the wall and roof sections (e.g. Figs. 2.18 and 2.19), understanding the different features and their rationales, especially where the construction is layered or a surface takes an intricate shape. Recall the discussion of windows in A Place of My Own.

§ what are the significant differences between small and large buildings when it comes to enclosure issues?

§ "a ‘flat’ roof is not flat!" Explain.

§ why might one consider putting insulation on the outside of a wall? why might one do this for a roof? what would be benefits and difficulties with this approach?