I7 - Describe Demountable Ceilings Flashcards
What gives the acoustic tile its acoustical properties?
1) Acoustic tiles are soft
2) pinholes absorb sound
What special considerations must be made when applying gypsum board to ceilings with supports at 600 MM (24”) O.c
5/8 or 1/2 controlled density board should be used to prevent sagging of the ceiling.
What special considerations must be made when applying gyprock board to ceilings with supports at 600 mm (24”) OC?
5/8 board or controlled density board should be used to prevent sagging of ceiling
Why is a textured finish usually used with drywall ceilings?
Textured ceilings are much easier to finish due to texture hiding flaw in finish
What is done to hide nailing in wood paneling?
Fastener are installed just above tongue just to hide them in TNG joint.
What is the standard size of ceiling tile used with suspended ceilings?
2x4 or 2x2
How are ventilation grills supported?
A separate hanger system must support grills.
heavy grills may need a system of 1/4 steel rods.
How long are main tees?
12’
What is the purpose of the slot in a 4 foot cross tee?
Slot in centre of 4’ cross tee used for 2x2 ceiling
What is the difference between a carrying channel and a furring channel?
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.
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”)
Furring channels attached at 600 mm OC max
What must be done before beginnings to build cabinet drops?
Check drawings must be accurate
What is resilient furring used for?
Sound proofing
List three architectural reasons for using dropped ceilings?
1) Improve acoustics
2) Create shapes to define room spaces
3) Reflect lights.
In kitchen and washroom, what kind of ceiling tile would you use?
Smooth-finished ceilings - easier to wash
Ceiling tile comes in many sizes the most common is:
12 x 12, 16 x 16 and 16 x 24.