BC chapter 3

Question 1

stress forces in materials

Answer 1

tension…
shear……
compression….

Question 2

tension

Answer 2

pulls the material apart , referred to as tensile stress.

Question 3

compression

Answer 3

squeezzes the material, referredto as compressive stress

Question 4

shear

Answer 4

slides one plane of material past an adjacent plane

Question 5

external load stresses

Answer 5

Axial
Eccentric load
Torsional load

Question 6

Axial load

Answer 6

load applied to the center of the cross-section of a member and perpendicular to that cross section

Question 7

Eccentric load

Answer 7

load perpendicular to the cross section of the structural member which does not pass thru the center of the cross section

Question 8

Torsional load

Answer 8

load applied off-center from the cross-section of the structural component and at a angle to or in the same plane as the cross section

Question 9

Dead load

Answer 9

weight of the structure ,structure members ,building components and any other features permanetly attached

Question 10

Live load

Answer 10

items within a building that are movable but are not included as a permanent part of the structure

Question 11

Static load

Answer 11

load that is steady ,motionless, constant,or applied gradually

Question 12

Dynamic load

Answer 12

loads that involved motion,including impact from wind ,falling objects and vibration ….also known as shock loading

Question 13

Effects of wind on a structure

Answer 13

Direct pressure….
Drag………….
Negative pressure……
Rocking or buffeting….
Vibration…………….
Clean off effect…..

Question 14

Trusses

Answer 14

is a framed structural units made up of a group of triangles in one plane.

Question 15

Typical truss shapes

Answer 15

span distances of 22 to 70 feet , but truss spans in modern construction may exceed 100 feet

Question 16

Steel stud walls

Answer 16

studs are placed 12 to 16 inches apart.