# Building construction 2 concepts Flashcards

1
Q

external and internal forces are called

A

internal-stress and strain

2
Q

stress define

A

force per unit area that produces deformation

3
Q

strain define

A

% of elongation that occures when a material is stressed

4
Q

four types of forces

A

compression
tension
torsion
shear

5
Q

compressive vs tensile vs torsional vs shear

A

squeeze
stretch
twisting
opposing forces pull opposite directions

6
Q

fire resistance is closely related to

A

mass

7
Q

shear walls resist

A

8
Q

A

axial

eccentric

9
Q

A

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

10
Q

A

perpendicular but not pass through center. bending support members

11
Q

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

A

10/2

12
Q

a bent beam has what two forces

A

compression top and tension bottom

13
Q

capacity increases by the

A

square of its depth and in direct proportion to width

14
Q

beams simple vs continuous

A

simple 2 points

cont 3 or more points

15
Q

fixed beam

A

supported and rigidly fixed two points

16
Q

bracket

A

diagonal support

17
Q

joist

A

beam of wood or steel

18
Q

girder

A

beam that support other beams

19
Q

lintel

A

spans opening masonry wall

20
Q

grillage

A

series closely spaced beams to carry heavy load

21
Q

cantilever

A

rigid support one end

22
Q

suspended beam

A

simple with one or both ends suspended on a tension member

23
Q

transfer beam

A

24
Q

distribution of loads on a beam

A

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

25
Q

trusses only support

A

26
Q

the economy fo a truss is it

A

separates compressive and tensile stresses

27
Q

components of trusses

A

chords-top and bottom members

web-struts, ties, and panel points

28
Q

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

A

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

29
Q

columns lose strength by

A

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

30
Q

3 types steel columns

A

H
box
cylindrical

31
Q

types of column failures

A

short, squat-crush

long, slender-buckling

32
Q

whats the column law

A

eulers law of columns

33
Q

temporary bracing in incomplete structures

A

guy bracing

34
Q

three types non load bearing walls

A

veneer
panel (curtain)
partition

35
Q

what is a cross wall

A

right angle to another wall

36
Q

two types glass walls

A

panel-one story

curtain-more than one story

37
Q

party wall

A

load bearing wall common to two structures

38
Q

failed connections masnory walls

A

shift outward