What is the structural deck’s main purpose?
to resist gravity loads and lateral loading from wind and seismic forces
What are the basic functions of a structural deck?
- Defelction
- component-anchorage technique
- dimensional stability
- fire resistance
- surface character
Name the 6 types of structural decks
- steel
- wood sheathing
- concrete
- gypsum
- preformed mineral wood fiber
- composite decks of lightweight insulated concrete
What are the common gages for steel decks?
22, 20, and 18 gage
(can be as thin as 28 gage)
Name the 3 steel decks based on the ribs distance
- narrow-rib = 1”
- intermediate = 1-3/4”
- Wide-ribbed = 2-1/2”
Prefabricated steel decks typically come in what dimensions?
18” - 36” wide and 20LF - 30LF length
Name 3 types of wood decks
- board-sheathing (1” nominal)
- Plank (up to 5” nominal thickness)
- Plywood (4x 8 panels, 1/2” min)
How do you typically install underlayments to wood decks?
nailed or stapled
2 forms of concrete decks?
- cast-in place
- precast
Cast-in place structural deck is advantageous in what sense?
It is continuous except where interrupted by expansion joints
Name 5 types of pre-cast concrete decks based on cross sections.
Single T, Double T, inverted channels, solid or cored plank
Name 2 types of Gypsum deck
Precast or cast-in place
Advantage to precast gypsum planks?
They come in 2-inch panels. They are nailable and noncombustible
Insulation can be nailed or hot mopped on
Decks are classified in what categories (2)?
nailable or non-nailable
Combustible or noncombustible
What decks are generally nailable?
wood, structural wood fiber, gypsum, and lightweight insulated concrete
