Chapter V.

SUMMARY OF DESIGN STEPS

(_a_) Construction of the rectangle representing the vertical or horizontal character of the primary mass with desirable proportions. Select the most prominent surface for this rectangle, preferably the front elevation.

(_b_) Subdivide this rectangle into two or three structural sections, horizontal and vertical in character. Make two or three trial freehand sketches on cross section paper for varied proportions and select the most pleasing in accordance with rules.

(_c_) Translate the selected sketch into a scale or full size drawing and add additional views to complete the requirements of a working drawing. Add additional structural elements: legs, rails, etc.

(_d_) For shop purposes, enlarge a scale drawing to full size, dimension and otherwise prepare it for actual use. See Figure 102a, page 68, for character of this change.

(_e_) Construct the project.

SUGGESTED PROBLEMS

Design a fire screen with two horizontal and three vertical major subdivisions.

Design a bookcase 4 feet 2 inches high with three horizontal and two vertical major subdivisions.

SUMMARY OF RULES

Rule 3a. _If the primary mass is divided into two vertical divisions, the divisions should be equal in area and similar in form._

Rule 3b. _If the primary mass is divided into three vertical divisions, the center division should be the larger, with the remaining divisions of equal size._

Rule 3c. _In elementary problems, if more than three vertical divisions are required, they should be so grouped as to analyze into Rules 3a and 3b, or be exactly similar._

REVIEW QUESTIONS

1. What is the nature and need of vertical space divisions?

2. State the rule governing the use of two vertical space divisions and give illustrations in wood, clay, and metal.

3. Give the rule relating to the use of three vertical space divisions and furnish illustrations in wood, clay, and metal.

4. What is the treatment of more than three vertical divisions? Why?