BT5 - EXAM 1

Bldg. Components are cast at site by formworks

Concrete product is created offsite and then delivered to its project destination for final use

A reinforced concrete slab directly supported by concrete columns; slabs are directly on columns

This slab is without beams or girders to transfer the loads to supporting members

This slab increases shear strength of slab

This slab reduces moment in the slab by reducing the clear or effective span

This slab increases negative moment capacity of slab

This stiffen the slab, hence, reduce deflection

This slab has the quickest and most common construction method

All construction members and other concrete frame contractors can undertake this work

This slab is appropriate for areas where tops of partitions need to be sealed to the slab for acoustic or fire reasons

This slab is faster and more economic since heads not need to be cut around beams or ribs

This slab can be designed with a good surface finish to the soffit, allowing it to be used

This slab has a lot of mechanical and engineering benefits

This slab's benefits include: flexibility in room layout, uniform surface for suspended water sprinkler system, pre-fabricated welded mesh, saving in bldg. height, and a buildable score

This slab's benefits include: allows architect to introduce partition walls anywhere required, allows owner to change the size of room layout, and allows choice of omitting false ceiling and finish soffit of slab with skim coating

This slab lowers story height reduces bldg. Weight due to lower partitions and cladding, etc.

This slab has prefabricated welded mesh as one of its benefits

It is a flat, horizontal structural elements made of reinforced concrete

It receives load and transfer it through: Beams > columns > footings

Thickness of a slab

This slab is supported by beams on 2 of its 4 sides

This slab is supported on beams opposite to each other

This slab has a cylindrical deflected shape

In this slab, longer span = more than twice of shorter span

In this slab, the ratio of longer span to the shorter span = greater than 2

In this slab, shorter span is subjected to bending

In this slab, main reinforcements are in the shorter directions to resist the bending

In this slab, secondary reinforcements are in the longer direction

This slab is supported on all 4 sides of a beam

In this slab, longer span = less than twice the shorter span

This slab has a saucer or dish shaped deflection

In this slab, both shorter and longer are subjected to bending

In this slab, main reinforcements are in both directions based on magnitude of bending

Drop panels add deflection to the slab thus minimizes the deflections

Modified version of flat plates with a column head and/or drop panel cast monolithically with the slab

This slab has no beams, but the drop panels and column heads will transfer the loads to the columns

In flat slab, formworks become complicated due to need for column heads and drop panels

Column head and drop panels act as special slabs on flat slabs

This slab is lightweight, hollow, grid-like systems on the soffit; it reduces self-weight of the slab w/o compromising structural stability

This slab can span long distances with ease since it is lightweight

In this slab, bands of beam run throughout the slab (grid/girder system)

This slab is suitable for flat areas

In this slab, volume of concrete is much less compared to others. moreover, reinforcement is in the form of mesh or individual bars

Some of this slab's characteristics are: good against shrinkage and lower than stiffened rafts and footing slabs

A stiffened raft has ___% concrete and ___% steel

Recommended thickness of a waffle slab

Overall depth and width of beams or ribs of a waffle slab

Recommended spacing of ribs on a waffle slab

Span of reinforced waffle slab

This slab is used when there is limited requirement for a number of columns

This slab's load-carrying capacity is greater than the other types of slabs

This slab provides good structural stability along with aesthetic appearance

This slab has good vibration control capacity --- useful for public bldgs. To control vibrations

This slab is lightweight and economical, since it requires less amount of concrete

This slab's advantage is the holedeck system

In this slab, formworks are costly due to large quantity requirement of pods and some special tools

In this slab, floor height should be more; hence, number of floors are reduced

This slab is not suitable against high winds and cyclonic areas

This slab has wide grids or bands of beams in the soffit of the beams

like waffle slabs, a ____ slab is:

• flexible
• light in section
• economical
• can be constructed for longer spans

This slab's main advantage is reduction in weight by removing part of concrete below the neutral axis

This slab is an alternative to conventional formwork system and helps in continuous vertical and horizontal construction

In this slab, process only stops when the required length of casting is completed

One of this slab's application includes construction of regular core high-rise structures

One of this slab's application includes construction of steel tanks and water towers

This slab's advantages include: non-stop method of construction, increase the rate of construction, increase the productivity

This slab's advantages include: provide more working space, creates a safe work environment for the workers, employs less accessory equipment, reduce labor costs

In this slab, uniform wall sections and layouts are obtained

This slab's disadvantages include: need sophisticated equipment , dimensional accuracy can go low in certain conditions

Precast method of a slab on the ground then lifted to the structure

In this slab, columns are erected first, not necessarily for full height of bldg.

This slab eliminates storing, handling, and transporting disadvantages , requires fewer joints than other types of precast building systems

In this slab, near base of columns, floor slabs are cast in succession; one atop another, with a parting compound between them to prevent bond

In this slab, as it reaches its final position, it is wedged in place and collars are welded to the columns

This slab's advantage include: no centering to soffit of slabs is required

This slab's advantage include: in bldgs. With similar floor plans throughout the height of the bldg.

This slab's disadvantage include: difficult to produce satisfactory connections between the precast members

In this slab, economy achieved is balanced by: amount to be spent in transportation and handling of precast members

In this slab, it is necessary to locate the precast factory at such place that transport and handling charges are brought down to the minimum extent