GWB Flashcards Preview

BD_Ballast > GWB > Flashcards

Flashcards in GWB Deck (27)
1

gwb sheet dimensions

4'x
8,10,12,14'

2

gwb thickness:
standard

¼, ⅜, ½, ⅝”

3

gwb dimensions for shaft enclosures

1” thick for shaft enclosures, 2’ widths.

4

gwb thickness:
2hr fire-rating.

3/4"

special bc replaces typ. two layer

5

gwb thickness:
most common commercial, high-end res.

⅝”

6

gwb thickness:
most common residential.

½”

7

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

⅜”

8

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

¼”

9

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

type X

10

gwb application to concrete/ masonry

mastic application

11

gwb application to wood/metal framing

nailed or screwed

12

gwb joints finished w

embedding paper/ fiberglass tape,
joint compound applied

13

gwb recycled paper surface used since date

1950's

14

gwb qualities of recycled paper core

more rigid, identical other properties

15

main source of sythetic gypsum:

flue-gas desulfurization
7% of market

16

recycling gwb

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

17

advantage wood framing over metal

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

18

typ metal framing gage

25 gage most common

19

metl gage stud shape

c-shaped, pre punched for conduit/wiring.

20

at floor/ceiling, framed into

runners

21

wallboard trim:

fabricated edging

22

corner bead types:
edge trim, finish w joint compound.

LC bead

23

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

L bead

24

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

LK bead

25

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

U bead

26

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

glass-reinforced gypsum: (GRG)

27

glass-reinforced gypsum:
typ use

pre manufactured decorative elements, poured in molds.

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