Question 1

Walls that are simply built up from the floor to the ceiling and serve the purpose of partitioning space into rooms, closets, etc., are known as ____.

Accepted Answer

Non-load-bearing walls are walls that do not carry any weight or structural load from above and are simply used for partitioning rooms or spaces. Framing walls are used to create the structure of a building and carry the weight of the roof or other elements. Weightless walls and skeletal walls are not common construction terms.

Question 2

A wooden floor system that is gaining in popularity is the plywood system. List two advantages that account for this popularity.

Accepted Answer

Two advantages of plywood floor systems are:
1) Because joists are not required, material costs are decreased.
2) Because the large 4' x 8' plywood panels are quickly and easily installed, labor costs are also decreased.

Question 3

The most common framing method used for building structural wood walls is called western framing or ____.

Accepted Answer

Platform framing is the most commonly used method for building structural wood walls. It involves constructing individual wall sections or "platforms" horizontally and then stacking them vertically to form the wall. This technique is efficient and cost-effective, and it allows for easy installation of insulation and air barriers. Scaffold framing is a less common method that involves building the wall in sections while standing on scaffolding. Balloon framing was a popular method in the past but is now rare due to safety concerns. MOD 24 framing is not a commonly used term in construction.

Question 4

An older framing method seldom used anymore for building structural walls, ____ consists of floor joists resting on the sill with headers or braces placed between the joists.

Accepted Answer

The method described is known as balloon framing. Platform framing (A) is currently the most common method for building structural walls, while scaffold framing (B) and MOD 24 framing (D) are not common framing methods.

Question 5

Floor systems of commercial buildings are of two types; one type, an ____, is made of poured-in-place concrete.

Accepted Answer

An on-grade floor system is made of poured-in-place concrete and is commonly used in commercial buildings. The other options, such as off-grade and off-mark floor systems, do not accurately describe this type of floor system. The term "on-mark" is not commonly used in the construction industry for floor systems.

Question 6

____ is a term used to describe the construction method whereby joists in a wooden floor system are stiffened to prevent misalignment, twisting, or warping.

Accepted Answer

Bridging is the construction method used to prevent misalignment, twisting or warping of joists in a wooden floor system. Bridging involves installing small wood or metal pieces between the joists at regular intervals, providing additional support to the floor system. This helps to distribute the loads evenly, reducing the risk of deflection and sagging over time.

Question 7

The reason that bracing wooden walls by attaching a sheet of plywood is limited to only the corners is because ____.

Accepted Answer

Plywood is an effective material for bracing wooden walls, but its use is often limited to corners due to the high cost associated with covering entire walls. This makes it a cost-prohibitive option for full-wall bracing, leading builders to seek more economical methods for the majority of the wall while still benefiting from the strength plywood offers at critical structural points.

Question 8

As a new framing method, ____ features 24" modular spacing of wall studs.

Accepted Answer

The question specifically mentions "24" modular spacing of wall studs" which is a feature of MOD 24 framing. Platform, scaffold, and balloon framing do not necessarily feature this spacing.

Question 9

As a major structural component of a wooden structure, ____ are those that actually carry the load imposed by the floor(s) and roof.

Accepted Answer

Load-bearing walls are the walls responsible for carrying the weight or load of a wooden structure. They provide essential support to the structure and are strategically placed to distribute the weight evenly, ensuring the stability and structural integrity of the building. Therefore, load-bearing walls are a critical component of any wooden structure.

Question 10

____, one of two basic types of stiffening joists in a wooden floor system, is more commonly accomplished with two diagonal metal braces attached at intervals between the joists.

Accepted Answer

The description matches cross bridging, which is achieved by placing wooden or metal braces between joists at right angles to them. Diagonal bracing is accomplished with diagonal wooden or metal braces attached between the joists, while traverse bracing involves horizontal members attached perpendicular to the joists. Intersect bridging is not a standard term in construction terminology.

Question 11

One advantage of floor trusses over joists and girders is that ____.

Accepted Answer

Floor trusses provide convenient avenues for plumbing and ductwork because they have open webs that allow for easy passage of these utilities.

Question 12

Structural designers and architects with an interest in reducing cost design a structure so that it is completely modular in both length and width. Which of the following length and width measurements would meet this requirement?

Accepted Answer

A modular design requires dimensions that are multiples of a standard module size. Typically, this is a whole number of feet or a common module size like 4 feet. Option D, with both dimensions being whole numbers, is the only choice that meets this requirement.

Question 13

____ may be shown on the floor plan with an arrow symbol indicating the direction of the span and a note indicating the size and spacing.

Accepted Answer

Joists are typically shown on a floor plan with an arrow symbol indicating the direction of the span and a note indicating the size and spacing. Girders, beams, and struts are also structural components, but they are typically shown in elevation drawings rather than on floor plans.

Question 14

A floor system that is sometimes used instead of the joist and girder system is the____.

Accepted Answer

The floor truss system is a viable alternative to the more traditional joist and girder system. In this system, pre-made trusses spanning the width of the building are used in place of individual joists and girders. This offers several advantages, including increased design flexibility, faster installation, and reduced labor costs. The other options (B, C, D) are not commonly used floor systems.

Question 15

What are three advantages of MOD 24 framing?

Accepted Answer

The answer of What are three advantages of MOD 24...

Question 16

____, one of two basic types of stiffening joists in a wooden floor system, consists of solid cuts of lumber placed between the joists and secured by nailing.

Accepted Answer

Solid bridging is the term used to describe solid cuts of lumber that are placed between joists in a wooden floor system to provide stiffening. They are secured by nailing and are one of two basic types of stiffening joists, the other being cross bridging.

Question 17

Floor systems of commercial buildings are of two types; one type, an ____, is usually made of wooden joists, girders, and planks

Accepted Answer

An off-grade floor system is typically elevated and constructed using wooden joists, girders, and planks, distinguishing it from on-grade systems that are built directly on the ground.

Question 18

Girders in wooden floor systems are of two types: built-up wooden girders and ____.

Accepted Answer

The question mentions that one type of girder is a built-up wooden girder, which suggests that the other type is not wooden. Steel girders are a common alternative to wooden girders and are often used in floor systems for their strength and durability. Cement girders are not a common alternative to wooden girders, as they would be extremely heavy and difficult to work with. Rebar girders are typically used to reinforce concrete and are not a viable option for a wooden floor system. Spiral girders are not a common type of girder and would not be a likely answer. Therefore, the best choice is A) steel girders.

Question 19

An advantage of a ____ is that the brace, being flush with the face of the studs rather than placed between them, does not interfere with the installation of insulation or electrical wiring.

Accepted Answer

A let-in brace is installed flush with the face of the studs, making it easier to install insulation or electrical wiring. The other types of braces (soleplate-top plate brace, continuous brace, diagonal brace) are typically installed between the studs, which can make it more difficult to work around them during insulation and electrical work.

Question 20

To provide additional support against bending, buckling, and wracking, wooden walls must be ____.

Accepted Answer

Bracing is a method used to provide additional support to wooden walls against bending, buckling, and wracking by adding diagonal or cross supports.

Quiz 3: Structural Wood Drafting