Competency: 206.00
Draw wall sections and details
Objective: 206.05
Determine the purpose and features of a wall section.
Sectional Drawings
Used to reveal the internal construction Provide information concerning
materials and assembly Detail sections show specific parts of
construction
Sectional BasicsCutting Planes Edge of cutting plane is drawn as a line
on the floor plan Heavy, dark line Coding includes two dashes Arrows indicate direction of sight Most often attached to a circle that
identifies the section and its location within the drawing set
Sectional BasicsCutting Planes Sometimes only the ends are shown to
prevent interference with other information Assumed to be a straight line between
ends If offset, the bend (offset) is shown A cutting plane extending fully across the
short dimension of the structure defines a transverse section
A cutting plane extending fully across the long dimension of a structure defines a longitudinal section
Sectional Basics
Section lining (hatching) Features behind the cutting plane are
not section, but are shown in proper position and scale
Materials are defined by symbols (section lines)
Hatching (section lining) is thinner than visible lines
Brick
Steel
Insulation
Section hatchingCommon Symbols
Concrete
Earth GravelSand
Lumber
Section hatchingCommon Symbols
Drawing Scale
Sections showing the entire building are drawn at small scales ¼” = 1’-0” are most common Small scales do not allow detail
Break lines are used to reduce distances by removing repetitive information Used where construction does not change
over a long distance Allows drawing large areas at readable scales Long break lines have a center zigzag or
looped connection
Drawing Scale
Scale selected for a Typical Wall Section should allow the details to be clearly shown while still fitting the available space
¾” = 1’-0”
1” = 1’-0”
1-½” = 1’-0”
Dimensions
Specific elevation numbers, distances, and sizes of building materials
Important dimensions are often included Floor to ceiling heights Crawl space vertical height Footing sizes Foundation wall thickness Roof overhang Roof slope
Dimensions
The order of notes is to give number, size, and material description of various building elements Ex: 2-2 x 4 DOUBLE TOP PLATE Leaders lead from the note to where the
note applies
Elements Shown onTypical Wall Section
Footing Foundation Drain tile and waterproofing
as needed Sill and sill anchoring system Joists and Rim Joists Subfloor Underlayment Sole plate Wall stud Double top plate Wall sheathing material Ceiling joist or truss
Rafter or truss Fascia (if included) Soffit (if included) Lookouts and other soffits
nailers Drip edge Building paper Roof covering material Insulation for walls, floors,
ceilings Interior and exterior wall finish
materials and trim Metal straps (hurricane ties)
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