Lumber
Structural Components
Fractions of a Foot
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Random
100

Nominal: 2x4

Actual: ?

1-1/2" x 3-1/2"

100

Vertical structure that encloses, divides, or supports the weight of the structure

Wall

100

1/2

6"

100

Horizontal cut, looking down from Above

Plan

100

What gas station's name is helpful when remembering the rise-to-run ratio of a staircase?

7-Eleven

Rise: vertical distance between stair treads (7"+/-)

Run: horizontal distance from the front edge of one tread to the next (11"+/-)

200

Nominal: 2x6

Actual: ?

1-1/2" x 5-1/2"

200

Assembly that divides a building into horizontal levels/stories, and provides support, stability, and a surface for walking on and placing objects

Floor

200

1/4

3"

200

Vertical view, standing directly in front of the building’s exterior or interior surface

Elevation

200

What is the height of a standard door?

6'-8" (80")

300

Vertical member that forms the framework of a wall, supports the weight of the structure, and provides a surface for attaching wall coverings

Stud

300

Uppermost covering of a structure that provides protection from environmental elements

Roof

300

1/8

1-1/2"

300

Vertical cut, standing directly in front of the cut

Section

300
What does the abbreviation WIC stand for?

Walk In Closet

400

Horizontal structural member that supports the weight of the subfloor, and any loads applied to the floor (people or objects)

Joist

400

Structure that provides access between different levels and bridges the large vertical distance by dividing it into smaller vertical distances

Staircase

400

7/8

10-1/2"

400

Measurable characteristics of an object or structure

Dimensions

400

What is the difference between residential v. commercial architecture and design?

Residential: spaces designed for the homeowner

Commercial: spaces designed for the public

500

When referring to lumber spacing, the abbreviation O.C. stands for what?

On Center (the distance between structural members, measured from their centers)

500

Base of the building that connects the structure to the ground, and transfers the building’s weight to the soil

Foundation

500

1/16

3/4"

500

Notes, labels, or other explanatory objects that provide additional information

Annotations

500

What is the difference between a load-bearing wall and a non-load-bearing wall?

Load-Bearing Wall: supports the weight of the structure

Non-Load-Bearing Wall: does not support the weight of the structure, and is only used to divide interior spaces

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