GWB

Question 1

gwb sheet dimensions

Answer 1

4’x

8,10,12,14’

Question 2

gwb thickness:

standard

Answer 2

¼, ⅜, ½, ⅝”

Question 3

gwb dimensions for shaft enclosures

Answer 3

1” thick for shaft enclosures, 2’ widths.

Question 4

gwb thickness:

2hr fire-rating.

Answer 4

3/4”

special bc replaces typ. two layer

Question 5

gwb thickness:

most common commercial, high-end res.

Answer 5

⅝”

Question 6

gwb thickness:

most common residential.

Answer 6

½”

Question 7

gwb thickness:
double layer applications,
or when overlayed in remodeling.

Answer 7

⅜”

Question 8

gwb thickness:
for curves,
and new finishes over old walls/ceilings.

Answer 8

¼”

Question 9

fire-rated partitions. 2/3/4 hrs.

Answer 9

type X

Question 10

gwb application to concrete/ masonry

Answer 10

mastic application

Question 11

gwb application to wood/metal framing

Answer 11

nailed or screwed

Question 12

gwb joints finished w

Answer 12

embedding paper/ fiberglass tape,

joint compound applied

Question 13

gwb recycled paper surface used since date

Answer 13

1950’s

Question 14

gwb qualities of recycled paper core

Answer 14

more rigid, identical other properties

Question 15

main source of sythetic gypsum:

Answer 15

flue-gas desulfurization

7% of market

Question 16

recycling gwb

Answer 16

pulverize into ≤ ½”, and work into ground as soil additive.

Question 17

advantage wood framing over metal

Answer 17

wood double as load bearing, whereas metal not unless heavy-gage, structural steel.

Question 18

typ metal framing gage

Answer 18

25 gage most common

Question 19

metl gage stud shape

Answer 19

c-shaped, pre punched for conduit/wiring.

Question 20

at floor/ceiling, framed into

Answer 20

runners

Question 21

wallboard trim:

Answer 21

fabricated edging

Question 22

corner bead types:

edge trim, finish w joint compound.

Answer 22

LC bead

Question 23

corner bead types:
edge trim w/o back flange.
useful for installation after the wallboard has been installed.
finish w joint compound.

Answer 23

L bead

Question 24

corner bead types:
edge trim for use with a kerfed jamb.
finish w joint compound.

Answer 24

LK bead

Question 25

corner bead types:
edge trim that does not req finishing w joint compound.
does have noticeable edge.
aka J metal by contractors.

Answer 25

U bead

Question 26

broad class of products,
high-strength, high-density gyp reinforced,

Answer 26

glass-reinforced gypsum: (GRG)

Question 27

glass-reinforced gypsum:

typ use

Answer 27

pre manufactured decorative elements, poured in molds.

ex. column covers, arches, coffered ceilings,
ornate moldings, light troughs, and trim.