Competency: 206.00
Objective: 206.05
Determine the purpose and features of a wall section.

 Used to reveal the internal construction
 Provide information concerning materials and assembly
 Detail sections show specific parts of construction

 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

 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

 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

Earth Sand
Gravel
Concrete
Lumber

 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

 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”
1½” = 1’-0”

 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

 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













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)