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B - General Commercial > Gypsum Construction > Flashcards

Gypsum Construction Flashcards

1
Q

What is one limitation of Gypsum Panels?

A

Not recommended for use in solar or other heating systems when board will be in direct contact with surfaces exceeding 125F.

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2
Q

Describe USG Sheetrock Brand Regular Core

A

1/4”, lightweight, low-cost, utility gypsum panel, used as a base layer for improving sound control in multiplayer partitions and in covering old wall and ceiling surfaces. Also used for forming curved surfaces. Meets ASTM C1396.

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3
Q

Describe USG Sheetrock Brand Mold Tough Gypsum Panels

A

Have a noncombustible, moisture gypsum core encased in moisture-and mold-resistant, 100% recycled green face and brown back paper. The 5/8” Firecode and 1/2” Firecode C Core panels are UL classified for fire resistance (Type X).

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4
Q

Describe USG Sheetrock Brand Exterior Gypsum Ceiling Board

A

Weather resistant board designed for use on the soffit side of eaves, canopies and carports.

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5
Q

What is a gypsom core?

A

Faced with specially treated, multilayered paper (blue) designed to provide a maximum bond to veneer plaster finishes.

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6
Q

What is the minimum temperature for plastering?

A

50F

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7
Q

For curtain wall construction, cover the sheathing with ____ asphalt felt or other suitable water barrier within ___ days of sheathing installation. Felts should be applied _____ with ___ overlap and immediately anchored with metal lath, masonry ties or corrosion resistant screws or staples.

A

No. 15 asphalt felt
30 days
horizontally with a 2” overlap

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8
Q

Gauge size for framing door frames?

A

20-gauge (33-mil) studs and runners

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9
Q

Wire gauge for hangers in suspended ceiling grill work?

A

8

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10
Q

Wire gauge for USG drywall suspensions system?

A

12

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11
Q

Wire gauge for wire tying channels in wall furring and ceiling construction?

A

18

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12
Q

What is the benefit of a bugle head screw?

A

A form of self-drilling screw that’s specifically designed for drywall applications. Bugle head screws feature a countersunk head with a flat top and a concave under-head bearing surface spinning the face paper into the cavity under the screw head for greater holding power and helps prevent damage.

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13
Q

Type S screws are design for use with?

A

Steel

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14
Q

Fastener selection - 1/2” single-layer panels to steel studs, runners, channels?

A

1” Type S Bugle Head

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15
Q

Fastener selection - 5/8” double-layer panels to steel studs, runners, channels?

A

1-5/8” Type S Bugle Head

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16
Q

Fastener selection - 3/8”, 1/2” and 5/8” single-layer panels to wood studs, joists?

A

1-1/4” Type W Bugle Head

17
Q

Wood framing maximum spacing on center is?

A

24” O.C. (2” from end)

18
Q

Hardware used with resilient channel installation?

A

3/8” Type S pan head screws

19
Q

Drive nails at least____” from ends or edges or gypsum board.

A

3/8”

20
Q

Double nailing application for Gypsum -
first nails at _____ OC along supports
perimeter at ____ OC

A

12” OC
7” OC

21
Q

With a 3/8” bead, approximately 3 - 5 gallons of adhesive will prepare framing for _____ Square feet of gypsum board.

A

1,000SF

22
Q

Control joints for plaster and lath surfaces should be provided at maximum _____ft. OC.

A

30

23
Q

Setting time for conventional basecoat plasters is generally _____ hours after mixing.

A

2 to 4

24
Q

When attaching a corner bead to the board in wood construction, the spacing of fasteners should be at______:

A

9” inch intervals in both flanges

25
Q

Using the ____ length nail possible is best to avoid nail pop when installing drywall.

A

Shortest

26
Q

The gypsum board that is both non-combustible and has a moisture core encased in moisture resistant brown paper is referred to as __________.

A

Green board.

27
Q

The maximum spacing of framing members used for 5/8” gypsum board installed perpendicular on a ceiling is______.

A

24” OC

28
Q

When using double-layer adhesive lamination, layout the face layer so all joints are offset____ from the parallel base-layer joints.

A

10”

29
Q

What size thickness of drywall is recommended for forming curved suraces?

A

1/4”

30
Q

Durabond (20) setting-type joint compound, that is used for gypsum board panels, has a setting time of_____.

A

20-30 minutes

31
Q

For levels of Gypsum Board Finish, which level of application finish is typically recommended for garages and warehouses?

A

Level 2

32
Q

To achieve the best results when plastering old surfaces, after removing the old plaster and lath, apply a _______ Rocklath plaster base to the framing and plaster in the same manner as new work.

A

3/8”

33
Q

When allowing for a control joint between gypsum panels, the minimum gap is _____.

A

1/2”

B - General Commercial (9 decks)

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