Chapter 4 - Floor Systems

Question 1

What are the types of floor structures?

Answer 1

concrete, steel, and wood

Question 2

What are bottom bars?

Answer 2

reinforcement in the section of a concrete beam subject to a positive moment

Question 3

What are truss bars?

Answer 3

longitudinal bars bent up or down at points of moment reversal in a concrete beam

Question 4

What is diagonal tension?

Answer 4

a result from the principal tensile stresses acting at an angle to the longitudinal axis of a beam

Question 5

What is a one- way slab?

Answer 5

reinforced in one direction, and cast integrally with parallel supporting beams

Question 6

What is a one-way joint slab?

Answer 6

cast integrally with a series of closely spaced joists, which are supported by a parallel set of beams

Question 7

What is a two-way slab and beam?

Answer 7

reinforced in two directions and cast integrally with supporting beams and columns on all four sides of square or nearly square bays

Question 8

What is a two-way waffle slab?

Answer 8

reinforced by ribs in two directions

Question 9

What is a two-way flat plate?

Answer 9

reinforced in two or more directions and supported directly by columns without beams or girders

Question 10

What is a two-way flat slab?

Answer 10

thickened at its column supports to increase shear strength

Question 11

What is pretensioning?

Answer 11

prestresses of a concrete member by stretching the reinforcing tendons BEFORE the concrete is cast

Question 12

What is posttensioning?

Answer 12

prestresses of a concrete member by tensioning the reinforcing tendons AFTER the concrete has been set

Question 13

What is shoring?

Answer 13

a process that temporarily supports a building or structure

Question 14

What are the types of steel beams?

Answer 14

S shape, W shape, C shape, and structural tubing

Question 15

What are plate girders?

Answer 15

built up from plates or shapes that are welded or riveted together

Question 16

What are cover plates?

Answer 16

fastened to the flanges of a plate girder to increase its section modulus in areas subject to high bonding stresses

Question 17

What are box girders?

Answer 17

built up from shapes and have hollow, rectangular cross section

Question 18

What are castellated beams?

Answer 18

increases the beams depth and strength without adding additional material and weight (hexagonal holes)

Question 19

What is subflooring?

Answer 19

structural material that spans across floor joists

Question 20

What is span rating?

Answer 20

part or the grade stamp found on the back of each panel

Question 21

What is underlayment?

Answer 21

it provides impact load resistance and a smooth surface for the direct application of nonstructural flooring materials

Question 22

What is a box beam?

Answer 22

made by gluing two or more plywood or OSB webs to sawn or LVL flanges

Question 23

What is a flitch beam?

Answer 23

timbers set on edge and bolted side by side to steel plates or sections

Question 24

What is a built-up beam?

Answer 24

equal in strength to the sum of the strengths of the individual pieces if none of the laminations are spliced

Question 25

What is a spaced beam?

Answer 25

blocked and securely nailed at frequent intervals to enable individual member to act as integral unit

Question 26

What is glue- laminated timber?

Answer 26

laminating stress- grade lumber with adhesive under controlled conditions, usually with the grain of all piles being parallel

Question 27

What is parallel strand lumber?

Answer 27

structural limber product made by bonding long, narrow wood strands together under heat and pressure using a waterproof adhesive

Question 28

What is laminated veneer lumber?

Answer 28

structural lumber product made by bonding layers of wood veneers together under heat and pressure using a waterproof adhesive

Question 29

What is cross laminated timber?