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Flashcards in Building construction 2 concepts Deck (38):
1

external and internal forces are called

external-load
internal-stress and strain

2

stress define

force per unit area that produces deformation

3

strain define

% of elongation that occures when a material is stressed

4

four types of forces

compression
tension
torsion
shear

5

compressive vs tensile vs torsional vs shear

squeeze
stretch
twisting
opposing forces pull opposite directions

6

fire resistance is closely related to

mass

7

shear walls resist

lateral loads

8

classifications of load

axial
eccentric

9

axial load is

force passes through center of section. perpendicular to the plane. applied evenly

10

eccentric load

perpendicular but not pass through center. bending support members

11

IF design load is 1/10 of tested strength, the safety factor is? what if 1/2?

10/2

12

a bent beam has what two forces

compression top and tension bottom

13

capacity increases by the

square of its depth and in direct proportion to width

14

beams simple vs continuous

simple 2 points
cont 3 or more points

15

fixed beam

supported and rigidly fixed two points

16

bracket

diagonal support

17

joist

beam of wood or steel

18

girder

beam that support other beams

19

lintel

spans opening masonry wall

20

grillage

series closely spaced beams to carry heavy load

21

cantilever

rigid support one end

22

suspended beam

simple with one or both ends suspended on a tension member

23

transfer beam

moves load laterally

24

distribution of loads on a beam

8 units
4 concentrated center
2 on cantilever
1 end of unsupported end cantilever

25

trusses only support

axial loads

26

the economy fo a truss is it

separates compressive and tensile stresses

27

components of trusses

chords-top and bottom members
web-struts, ties, and panel points

28

struts, ties, and panel joints (parts of truss)

struts-compressive connecting members
ties-tensile connecting members
panel joints-connections

29

columns lose strength by

the square of the change of length. (12 foot carry 1/4 of 6 foot)

30

3 types steel columns

H
box
cylindrical

31

types of column failures

short, squat-crush
long, slender-buckling

32

whats the column law

eulers law of columns

33

temporary bracing in incomplete structures

guy bracing

34

three types non load bearing walls

veneer
panel (curtain)
partition

35

what is a cross wall

right angle to another wall

36

two types glass walls

panel-one story
curtain-more than one story

37

party wall

load bearing wall common to two structures

38

failed connections masnory walls

shift outward