I7 - Describe Demountable Ceilings Flashcards

1
Q

What gives the acoustic tile its acoustical properties?

A

1) Acoustic tiles are soft
2) pinholes absorb sound

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2
Q

What special considerations must be made when applying gypsum board to ceilings with supports at 600 MM (24”) O.c

A

5/8 or 1/2 controlled density board should be used to prevent sagging of the ceiling.

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3
Q

What special considerations must be made when applying gyprock board to ceilings with supports at 600 mm (24”) OC?

A

5/8 board or controlled density board should be used to prevent sagging of ceiling

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4
Q

Why is a textured finish usually used with drywall ceilings?

A

Textured ceilings are much easier to finish due to texture hiding flaw in finish

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5
Q

What is done to hide nailing in wood paneling?

A

Fastener are installed just above tongue just to hide them in TNG joint.

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6
Q

What is the standard size of ceiling tile used with suspended ceilings?

A

2x4 or 2x2

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7
Q

How are ventilation grills supported?

A

A separate hanger system must support grills.

heavy grills may need a system of 1/4 steel rods.

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8
Q

How long are main tees?

A

12’

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9
Q

What is the purpose of the slot in a 4 foot cross tee?

A

Slot in centre of 4’ cross tee used for 2x2 ceiling

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10
Q

What is the difference between a carrying channel and a furring channel?

A

Carrying channel - heavy gauge steel supported by hanger wires spaced at 48” Oc within 6” of ends

Furring channel - light gauge steel attached to carrying channels or wood joists.

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11
Q

What is used to support the gypsum board in a suspended ceiling when the spacing between the carrying channels is greater than 1200 mm (48”)

A

Furring channels attached at 600 mm OC max

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12
Q

What must be done before beginnings to build cabinet drops?

A

Check drawings must be accurate

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13
Q

What is resilient furring used for?

A

Sound proofing

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14
Q

List three architectural reasons for using dropped ceilings?

A

1) Improve acoustics
2) Create shapes to define room spaces
3) Reflect lights.

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15
Q

In kitchen and washroom, what kind of ceiling tile would you use?

A

Smooth-finished ceilings - easier to wash

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16
Q

Ceiling tile comes in many sizes the most common is:

A

12 x 12, 16 x 16 and 16 x 24.

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17
Q

Unless the tiles are being installed over drywall, underside or ceiling joists are strapped with:

A

19 mm thick furring boards on centres that match the tile dimensions.

18
Q

Interlocking tiles are installed with:

A

staples

19
Q

Square edge tiles are installed with:

A

adhesive

20
Q

Ceiling tiles can be installed how?

A

Surface mounted grid system that is installed tight to the underside of joists.

21
Q

Acoustic tile is?

A

Acoustic tile is made from:

Fibre board, provides thermal insulation and improves the acoustics in the room

22
Q

Thickness of wood panel ceiling?

A

5/16 to 1”

23
Q

Purpose of suspended ceiling types and components?

A

Exposed grid allows the top of tracks of demountable partitions to be fastened to it without damaging the ceiling finish.

24
Q

How do you install eyelet into concrete?

A

Hole are drilled and specially designed concrete sleeve anchor hangers are hammered up into holes and then lightly pulled to set sleeve.

25
Q

What kind of hanger wire is used?

A

10 g steel wire approx 3mm that has been pre-stressed.

Comes in 10’ lengths. Packaged straight and not rolled up.

Alllows it to hang straight after being tied.

26
Q

Hanger wire length can be adjusted by:

A

Bending and twisting as in Figure 5 or using preformed with end hooks and a sliding adjustment bracket.

27
Q

What is a wall mold?

A

L-shaped metal molding attached to the wall. Supports the edges of the ceiling tile.

28
Q

Wall mold is attached to framing how?

A

Screws or roofing nails spaced at 600 mm OC

29
Q

What is the main Tee?

A

Known as main beam - Supporting member of the grid system.

30
Q

Main Tee is supported with wire how often?

A

Every 4’

31
Q

Main tee has slots where?

A

3” from the ends and then every 6” to allow placement of the cross tees. Main Tee come in 12’ lengths.

32
Q

What are cross tees?

A

Cross tee span from main to main tee.

Either 2’ or 4’ in length.

Cross teee has 1.2m slot in mid point allowing 6 mm cross tee to be inserted.

33
Q

Most tiles are designed to fit into a:

A

600 mm x 1200 mm ( 2 ‘ x 4 ‘ ) grid system. Tiles themselves are slightly smaller to allow them to be easily slipped into place.

34
Q

What is a ventilation grill?

A

Designed to fit into a 600 x 600 mm grid space.

35
Q

Heavy grills are supported how?

A

Not bear upon the cieling grid, may consist of 1/4” steel rods securely fastened to overhead supports.

36
Q

Light fixtures are designed to fit in:

A

600 x 1200 mm (2 ‘ x 4 ‘ ) grid space.

Must be independently supported.

37
Q

Seiesmic ceilings supported how?

A

with special joiners

38
Q

Dropped ceiling projects how far beyond face of cabinets?

A

1”

39
Q

What is a carrying channel?

A

Heavy gauge steel channel. Usually 38 mm (11/2”) wide with 13 mm (1/2) channel legs.

Support channels with hanger wire at 1200 mm (48”) and within 6” of their ends.

40
Q

How to attach furring and steel studs to the carrying channel?

A

With tie wire. Attach gypsum board to the furring or stud with screws.