Structures Quiz
False
Because of the efficiency of structural steel, the dimension measured from the ceiling of the first floor to the floor of the second floor is typically 12 inches or less. T/F
False
Cold formed steel (e.g. metal deck and steel studs) are formed at temperatures that are at or below freezing. T/F
D
Below are a different structural approaches to tower design. Select the which will get you the most number of floors. a. Bundled Tubes b. Braced Frame c. Tube-in-Tube Structure d. Megaframe
pin
Below is a diagram of a structural support. Identify the type of support indicated by the symbol.
roller
Below is a diagram of a structural support. Identify the type of support indicated by the symbol.
A
Below is a photograph of a castellated steel beam for a parking garage. What type of fire proofing is being applied? a. intumescent paint b. gypsum board c. cementitious spray-on fireproofing. d. none of the above; because steel is non-combustible and therefore does not need to be fireproofed.
Buckling
Below is a picture of a column failing under a compression load. From the list, select the best description as to how the column is failing.
Bending
Below is an image of a concrete beam being tested. The cracks that have developed at the bottom of the beam express what time of stress failure?
True
Bookshelves of a library would be considered as part of the building's live load. T/F
C
A W12x27 section means: a. a section manufactured by a company using name "W". The section is 12 inches wide by 27 inches long b. a wide flange section with actual depth of 12 inches and yield stress of 27 kips per square inch c. a wide flange section with nominal depth of 12 inches and weighing 27 pounds per linear foot d. a wide flange section with nominal depth of 12 inches by nominal width of 27 inches
True
Even though structural steel is non-combustible, it should be fire protected for most buildings T/F
D
Identify the type of lateral bracing in the the image below: a. V bracing b. eccentric bracing c. diagonal bracing d. inverted V or K bracing
WF
If the three cross sections have the same area, which one has a highest moment of inertia and would be better for a beam?
False
In a building with multiple bays, every bay should be laterally braced. T/F
A
In the below photograph, which of the following BEST identifies the connectors used between the steel members? a. rivets b. shear bolts c. welds d. slip-critical bolts
C
Joist hangers, rafter anchors, post caps, beam hangers, and framing anchors are often used to connect framing members in wood light frame construction. What material are they usually made of? a. Hot rolled steel b. Aluminum c. Sheet metal (light gauge steel) d. Cast iron e. Heavy-duty plastic
E
Light gauge steel buildings must be stiffened by: a. bracing studs at 4ˊ intervals b. diagonally bracing walls c. adding stiffeners at ends of joists d. none of these are necessary e. all of these are necessary
True
Live Loads are typically specified by the International Building Code (IBC) and depend on the type of building and the use of space T/F
False
Metal deck can easily span 25 feet without intermediate supports. T/F
True
Providing a moment connection at both ends of a column shortens the effective length of the column, reduces the slenderness ratio, and thus increases the allowable load compared to a column with pin connections at both ends. T/F
D
Select an important factor in designing the structure of a tower. a. a stable and level foundation b. provide lateral bracing to reduce drift c. provide bracing in plan to reduce torque d. all of the above
D
Select the proper name for the steel section shown. a. Angle b. American Standard c. Wide Flange d. Channel
True
Structural steel beams are typically spaced according to the spanning capability of the metal deck. T/F
False
The bending stress in a beam is highest at the neutral axis of the cross section. T/F
C
The image below is of a precast element that is horizontally spanning overhead. Name the precast element. a. Single 'T' b. Hollow core slab c. Double 'T' d. AASHTO beam
A and C
The image is a diagram axonometric of a house. (The b and c faces are closest to you; the a and d faces are at the back). The green arrow is a lateral load placed on the house. Identify which building faces resist the lateral load.
True
The maximum horizontal shear stress in a beam is at the neutral axis of the cross-section. T/F
False
There are little to no limits on the sizes for precast concrete. T/F
True
Timber is more fire resistant than dimensional lumber. Therefore, according to the International Building Code (IBC), timber is classified different than dimensional lumber. T/F
D
Welded connections: a. are usually weaker than bolted connections. b. can be performed by unskilled workers. c. can be performed in any weather conditions. d. none of the above.
plain saw
What is the type of sawing indicated on the log below?
10
What is the vertical reaction at A (i.e. solve for Ay) in kips?
20
What is the vertical reaction at B (i.e. solve for By) in kips?
A
Which of the following statements regarding softwood and hardwood is true? Select one: a. softwood comes from coniferous trees and hardwood from deciduous trees b. hardwoods are typically used for dimensional lumber c. hardwood is always harder than softwood d. the cellular structure of both softwood and hardwoods are the same
C
Which of the following statements regarding the comparison of light gauge steel to wood framing is true? a. light gauge steel framing members are significantly heavier than the wood members to which they are structurally equivalent. b. light gauge steel framing provide better thermal insulation than do wood members of the same size. c. steel members tend to be straighter and more uniform than their wood counterparts. d. all of the above
platform
Which one below best describes the type of framing in the photograph?
E
Which one of the cross-sectional shapes below is the least efficient for a column?
D
Which one of the following best describes open-web steel joists? a. they are stiff and provide little deflection or movement b. they are best suited for heavy point loads c. they are limited in their spanning capabilities, and often only span up to 45 feet d. because of their depth, they often required lateral bracing
D
Which one of the following is NOT a characteristic of steel. a. ductile b. denser than wood and concrete c. affected by fire d. price is consistant and is often cheaper than wood
D
Which one of the following is NOT a typically characteristic of wood? a. moisture causes material to swell b. strength is affected by material grade and species c. available in many different products d. it has a lot of embodied energy (especially when compared to metals)
D
Which one of the following is NOT considered to be a dynamic load? a. Vibrations from equipment b. Seismic Loads c. Wind Loads d. People
C
Which one of the following lists the structural members in the order of most carried load to least carried load? a. columns, beams, girders, rafters b. purloins, beams, girders, decking c. columns, girders, beams, joists d. joists, girders, beams, columns
B
Which one of the following statements best describes the effect that a larger moment of inertia has on a beam? A.higher bending stress B.lower deflection C.less applied load D.higher shear stress
D
Which one of the following statements regarding statics equations is correct? a. Sum of the forces in the x direction (e.g. ∑Fx) must be zero b. Sum of the moments (e.g. ∑M) must be zero c. Sum of the forces in the y direction (e.g. ∑Fy) must be zero d. All of the above
C
Which statement regarding hollow-core slabs is NOT correct? a. They span intermediate lengths b. They are lighter than solid slabs c. They are cast with a wet mixture of slumping concrete d. They are often 4 ft wide
C
Wood has many properties that affect the structural strength of a member. Which one of those listed below is LEAST LIKELY to be one of them? a. wood species b. number of knots and other defects c. number of finished (i.e. milled) surfaces d. moisture
96
You are designing a house and would like to calculate the applied loads on the joists (lb/ft) . For residences, the live load of the floor is to be 40 lb/ ft2. You estimate the the building's dead load should be 8 lb/ ft2. All of the joists are to be spaced 2 ft on center (OC). What is the applied load (lb/ft) on the center joist? (i.e. not the ones on the end) Do not include the units in your answer.
