Draw a Plan of the Following Wall Assembly and Then

question 27

Essay

Draw a plan of the following wall assembly and then determine its total R- value, Rt. Starting from the outside face of the wall, the assembly consists of the following layers:
4- in. nominal (3- 5/8- in. actual)brick veneer 2- in. air space (cavity)
0.75- in.- thick extruded polystyrene sheathing
2 × 6 studs with 5- 1/2- in.- thick fiberglass insulation 1/2- in.- thick gypsum wallboard
(Note: In calculating the value of Rt, ignore the presence of wood studs and assume that the entire layer consists fiberglass insulation.)

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Definitions:

Weighted Average Cost

A calculation that takes into account the varying costs and quantities of resources or components, producing a composite average cost.

Earnings Before Interest

Earnings before interest is a measure of a company's profitability that calculates earnings before the expense of interest is deducted; it’s part of the calculation used for EBIT (earnings before interest and taxes).

Unlevered Cost

The cost of financing a project or investment without any debt.

Debt/Equity Ratio

This ratio signals the proportionate financing of company assets by means of shareholders' equity and debt.