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)