建筑制图与设计 Architectural Drafting and Design, 6th edition_3-4.pdf

Chapter 24: Introduction to Elevations 575
A BUILT-UP ROOF MAY A DOUBLE-DOMED SKYLIGHT SHOULD
BE DRAWN WITH A HAVE A SLIGHTLY CURVED SURFACE
PATTERN OF DOTS TO BUILT-UP ROOFS ARE TO REFLECT THE CURVED PLASTIC.
REPRESENT THE GRAVEL OFTEN LEFT BLANK SPECIFY SIZE AND MANUFACTURER.
OR
FIGURE 2419 Drawing built-up roofs. SIDE FRONT
DOUBLE-DOMED SKYLIGHT
THE FLAT-GLASS SKYLIGHT CAN BE
styles, skylights usually resemble the model shown DRAWN AS A RECTANGLE. SPECIFY
SIZE AND MANUFACTURER.
in Figure 24-20. Depending on the pitch of the roof,
skylights may or may not be drawn. On very low-
pitched roofs, a skylight may be unrecognizable. On
roofs over 3/12 pitch, the shape of the skylight can
usually be drawn without creating confusion. Unless
the roof is very steep, a rectangular skylight will
appear almost square. The flatter the roof, the more
distortion there will be in the size of the skylight.
Figure 24-21 mon methods of drawing SIDE FRONT
flat-glass and domed skylights. FLAT-GLASS SKYLIGHT
FIGURE 2421 Representing domed and flat-glass skylights on
elevations.
Wall Coverings
Exterior wall coverings are usually made of wood, wood
substitutes, masonry, metal, plaster, or o. Each has
its own distinctive look in elevation.
Wood
Wood siding can be installed in large sheets or in
individual pieces. Plywood sheets are a popular wood
siding because of their cost and ease of installation.
Individual pieces of wood provide an attractive finish
but usually cost more than plywood. This higher cost
results from differences in material and the labor to
install each individual piece.
Plywood siding can have many textures, finishes,
and patterns. Textures and finishes are not shown on
the elevations but may be specified in a general note.
Patterns in the plywood are usually shown. The most
common patterns in plywood are T1–11 (Figure 24-22),
board and batten (Figure 24-23), and plain or rough-