Chapter 4 - Floor Systems Flashcards
What are the types of floor structures?
concrete, steel, and wood
What are bottom bars?
reinforcement in the section of a concrete beam subject to a positive moment
What are truss bars?
longitudinal bars bent up or down at points of moment reversal in a concrete beam
What is diagonal tension?
a result from the principal tensile stresses acting at an angle to the longitudinal axis of a beam
What is a one- way slab?
reinforced in one direction, and cast integrally with parallel supporting beams
What is a one-way joint slab?
cast integrally with a series of closely spaced joists, which are supported by a parallel set of beams
What is a two-way slab and beam?
reinforced in two directions and cast integrally with supporting beams and columns on all four sides of square or nearly square bays
What is a two-way waffle slab?
reinforced by ribs in two directions
What is a two-way flat plate?
reinforced in two or more directions and supported directly by columns without beams or girders
What is a two-way flat slab?
thickened at its column supports to increase shear strength
What is pretensioning?
prestresses of a concrete member by stretching the reinforcing tendons BEFORE the concrete is cast
What is posttensioning?
prestresses of a concrete member by tensioning the reinforcing tendons AFTER the concrete has been set
What is shoring?
a process that temporarily supports a building or structure
What are the types of steel beams?
S shape, W shape, C shape, and structural tubing
What are plate girders?
built up from plates or shapes that are welded or riveted together
What are cover plates?
fastened to the flanges of a plate girder to increase its section modulus in areas subject to high bonding stresses
What are box girders?
built up from shapes and have hollow, rectangular cross section
What are castellated beams?
increases the beams depth and strength without adding additional material and weight (hexagonal holes)
What is subflooring?
structural material that spans across floor joists
What is span rating?
part or the grade stamp found on the back of each panel
What is underlayment?
it provides impact load resistance and a smooth surface for the direct application of nonstructural flooring materials
What is a box beam?
made by gluing two or more plywood or OSB webs to sawn or LVL flanges
What is a flitch beam?
timbers set on edge and bolted side by side to steel plates or sections
What is a built-up beam?
equal in strength to the sum of the strengths of the individual pieces if none of the laminations are spliced
What is a spaced beam?
blocked and securely nailed at frequent intervals to enable individual member to act as integral unit
What is glue- laminated timber?
laminating stress- grade lumber with adhesive under controlled conditions, usually with the grain of all piles being parallel
What is parallel strand lumber?
structural limber product made by bonding long, narrow wood strands together under heat and pressure using a waterproof adhesive
What is laminated veneer lumber?
structural lumber product made by bonding layers of wood veneers together under heat and pressure using a waterproof adhesive
What is cross laminated timber?
