PX : Building Systems and Integration Flashcards
79 What is displacement ventilation?
Air distribution in which supply air originates at the floor level and rises to return air grilles in the ceiling.
109 What are five causes of building movement that must be considered when detailing?
-dead load deflection -lateral loading (wind and seismic) -Water absorption -live load deflection -temperature change
110 What is a tolerance?
Allowable variation from a given line, dimension or size.
108 What are four types of fire detection devices?
-photoelectric detectors -rise-of-temperature detectors -ionization detectors -flame detectors
107 What two methods are used to measure speech privacy in open offices?
-articulation class -articulation index
106 What is a compartmentation in interior design?
The practice of separating areas of a building with fire-rated construction in order to contain a fire to one area and limit its spread.
105 What is a dedicated circuit?
This is a circuit that contains a single electrical outlet.
104 What is an access door?
A opening used to provide access to mechanical and electrical components behind walls.
103 What is a chase wall?
2 runs of studs separated by a space large enough to accommodate pipes.
102 What is the typical spacing for residential studs and joists?
16” on center
101 What are joists, and what are they typically made of?
These are horizontal repetitive elements used to support floors. They are typically made from wood members with a nominal width of 2”.
100 Why should post-tensioned concrete slabs never be cut into?
The tendons of this construction element should not be cut because they are under high stress.
99 What is a core drill?
A hole with a 2-4” diameter drilled through a concrete floor to accommodate conduits for electrical, telephone and data wiring.
98 What is required at the top of a partition to accommodate deflection of the floor above?
A slip joint.
97 What type of load is created on a building by the force of wind or an earthquake?
Lateral
96 What are live loads?
People, furniture, and movable equipment
95 What type of concrete system is likely to be found where floor-to-floor heights are kept to a minimum?
Flat plate
94 What are the two major types of concrete structural systems?
-cast in place -pre-cast
93 What four characteristics distinguish a fire-rated suspended acoustical ceiling from a non-rated standard ceiling?
-it is part of an entire fire-rated floor/ceiling assembly -its tiles must be rated mineral tiles -it uses hold down clips -it must have expansion slots in the grid.
92 What type of construction element is shown, and what are the components labeled A and B?
This is suspended gypsum wallboard ceiling A-cold-rolled steel channel B-furring channel (hat channel)
91 In this diagram of a door opening, what are the components labeled A, B and C?
A-Head B-jamb C-threshold (or sill)
90 What are the common differences between residential and commercial construction of wallboard partitions?
residential is typically 2x4 wood studs with 1/2” wallboard, while commercial uses metal studs with 5/8” wallboard.
89 What is a sole plate?
Horizontal wood member that serves as the base for the studs in a wood stud partition.
88 What are the components of a fire-rated door assembly?
Door (including glazing), frame, hardware
87 What type of construction element is shown, and what are the components labeled A, B, and C?
The illustration shows a section of a standard wood doorframe in a wood stud partition, including the stop (A), casing trim (B), and shim (C)
86 What is a daylight factor?
This is the ratio of the indoor illuminance at a point on a horizontal surface to the unobstructed exterior horizontal lluminance.
85 What are some ways to increase speech privacy in a large space?
-Absorptive ceiling material -Space dividers to reduce sound transmission -create distance between noisy activities -arrange hard surfaces to minimize reflected sound -use a well-designed background masking system
84 What are five basic ways to control sound transmission through a partition?
-increase mass -provide additional resilience -Insulate the cavity -Seal all crack between components -Provide sealed openings, such as doors and windows.
83 In a large room, where is the most effective place to install a sound-absorbing material?
Ceiling
82 What is the sound transmission class (STC) of a partition?
A single number rating of a partition’s ability to reduce sound transmission.
81 What are the two most important variable in controlling sound transmission through a building element?
-Mass -Stiffness
80 What is a three-way switch?
Allows users to control a device from 2 different locations.
