Building Systems, Materials, & Assemblies Flashcards
What is autoclaved aerated concrete, or AAC?
This is a lightweight precast building material made by adding aluminum powder to concrete, placing the mixture in molds, and curing it in a pressurized steam chamber.
What are two used for type III cement in ready mix applications?
This kind of cement is used for
• projects requiring high early strength
• cold weather curing
For what type of building is lift slab construction used?
This kind of construction is used in multistory buildings with entire floor sections cast on the ground.
Slip forming is commonly used in the construction of two kinds of structures. What two?
This type of concrete forming is commonly used in the construction of tunnels and the cores of high-rise buildings.
What are the two primary considerations when selecting allowable wood stresses?
When selecting these, the two primary considerations are size categories and wood species.
What two characteristics of steel are increased by cold rolling?
This process increases steels strength and elastic limit.
Under what circumstance should a holeless hydraulic elevator be used?
This kind of elevator should be used in situations where drilling is not feasible or would be prohibitively expensive.
How is an open web steel joist built?
This kind of member is built in the shop by welding together a continuous steel rod or steel angles, forming the web and steel angles, and forming the chord.
In the steel designation W18 x 36, what does the 18 represent?
In the steel designation W18 x 36, this number is the nominal depth of the steel beam in inches.
What two methods of tensioning are used for prestressed concrete?
Pretensioning and post-tensioning are two methods used to construct this type of concrete.
Name two properties of steel that are affected negatively if too much carbon is added.
If too much of this element is added to steel, the steel’s strength and ductility are decreased.
What is a passive solar energy system?
This is a system that collects, stores, and distributes energy without the use of mechanical equipment.
What size increments are standard for reinforcing bars?
This construction material is available in size increments of 1/8 in in diameter.
What type of pressure is a structure subjected to if it is below the water table?
A structure under those circumstances is subject to hydrostatic pressure.
Which material has a greater construction tolerance, a steel beam or a concrete footing?
This level of variance is greater in a concrete footing than it is in a steel beam.
What range of pressure is used in municipal water systems?
In municipal systems, this varies from 40 psi to 80 psi.
What type of elevator is commonly used in a high rise building?
A gearless traction elevator is commonly used in this type of building.
How is brick veneer supported in a multistory building?
To support this, a steel shelf angle is anchored to the structure at every story.
In architectural wood paneling, what is bookmatching?
This is the placing of wood panels so that the adjacent leaves form a symmetrical grain pattern.
What is the nominal diameter of no. 5 rebar?
The nominal diameter of this rebar is 5/8 in.
Name four structural systems that would minimize floor thickness to reduce total building height or to reduce floor spandrel depth on the building facade.
The thinnest floor systems are slab systems without ribs, such as:
• cross laminated timber
• post-tensioned one way solid slab
• sitecast concrete two-way plate plate
or flat slab (esp. when post tensioned)
• precast prestressed hollow-core or
solid slab
List three criteria to minimum site disturbance during construction.
Criteria to minimize site disturbance during construction would be:
• column and beam systems supported on point footings, thereby minimizing excavation.
• long span systems that minimize bearing elements.
• systems that rely on a high degree of off-site prefabrication to minimize construction activities on-site.
Unintended pathways of sound that penetrate through construction are called what?
Flanking