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12/13/2010
1
BUILDING CONSTRUCTION
FLOOR SYSTEMS
( Ref: Building Construction Illustrated, Francis DK Ching)
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
BUILDING CONSTRUCTION
Floor systems
~ Horizontal planes of the construction that must support both live loads and dead loadsand dead loads.
~ It transfer their loads horizontally across space to either beams and columns or to loadbearing walls.
~ May be composed of series of linear beams and joist overlaid with a plane of sheathing or decking.
~ The depth is directly related to the size and proportion of the structural
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
The depth is directly related to the size and proportion of the structural bays it must span and the strength of the material used.
12/13/2010
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BUILDING CONSTRUCTION
~ Except for exterior floor decks, floor systems are not normally exposed to weather
Floor systems
to weather.
~ Because they all must support traffic, durable, resistance to wear, and maintenance requirements are factors to consider in the selection of a floor finish and the system required to support it.
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
BUILDING CONSTRUCTION
Floor systems
~ Comparative floor systems:-
C t i l / t i it* Concrete Floor Slabs
* Steel Floor Decking
* Wood Floor Planks
Cast-in-place / cast-in-situ
Precast concrete slab
Metal decking
Plywood / wood decking
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
* Wood Floor PlanksTimber planks
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BUILDING CONSTRUCTION
Concrete floor systems
One way slab
~ uniformly thick
~ reinforced in one direction
~ cast integrated with parallel supporting beams
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
BUILDING CONSTRUCTION
Concrete floor systems
One-way joist slab
~ also known as ribbed slab
~ cast interestedly with series of closely spaced joists or parallel set of beams
~ suitable for longer spans and heavier loads than one way
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
heavier loads than one-way slab
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BUILDING CONSTRUCTION
Concrete floor systems
Two-way slab and beam
~ uniformed thickness
~ reinforced in two directions
~ cast integrally with supporting beams and columns on all four sides
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
~ effective for medium spans and heavy loads
~ high resistance to lateral forces
BUILDING CONSTRUCTION
Concrete floor systems
Two-way waffle slab
~ two way concrete slab reinforced by ribs in two direction
~ able to carry heavier loads
~ span longer distance
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
12/13/2010
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BUILDING CONSTRUCTION
Concrete floor systems
Two-way flat plate
~ uniformed thickness
~ reinforced in two or more directions
~ supported directly by columns without beams or girders
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
~ lower floor to floor heights
~ flexible in column placement
~ practical for apartment or hotel construction
BUILDING CONSTRUCTION
Concrete floor systems
Two-way flat slab
~ flat plate thickened at its column supports
~ intend to increase its shear strength and moment resisting capacity
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
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BUILDING CONSTRUCTION
Precast concrete floor systems
~ are one way spanning units
~ supported by site-cast concrete, or precast concrete, or masonry bearing walls etc.
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
BUILDING CONSTRUCTION
Concrete Formwork & Shoring
Knee Bracing
Braced T-and-L- heads
Knee Bracing
KickerLedger
Blocking
Metal or wood joist
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
Bracing
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BUILDING CONSTRUCTION
~ Solid Flat Slab
Precast concrete units
~ Hollow Core Slab
~ Single Tees
~ Double Tees
~ Rectangular Beams
~ L-Shape Beam
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
L Shape Beam
~ Inverted Tee Beam
~ Girders
BUILDING CONSTRUCTION
Precast concrete connection
Synthetic rubber bearing pad
Steel angle welded to steel plates cast into beam and column
Reinforced site-cast concrete topping (SCREEDING)
Synthetic rubber bearing pad
ALL RIGHTS RESERVEDNo part of this document may be reproduced without written approval from Limkokwing University of Creative Technology, Botswana
Precast Beams
g p
Precast Structural Tees
g p