H7 - Decks - LT #4

Question 1

What is a porch?

Answer 1

Roofed deck, part of the entrance

Question 2

Four basic structural parts of a deck?

Answer 2

Foundation, posts, beam, and joists

Question 3

Why is anchorage important for high-level decks?

Answer 3

Possible wind uplifts

Question 4

What is the purpose for cantilevering beams & joists?

Answer 4

Reduce clear span and makes layout and construction easier

Question 5

List three ways the connections for deck joists and beams can be made:

Answer 5

Using Fasteners, connecting brackets & hangers

Question 6

What is the concern when using a ledger without spacers against the house wall?

Answer 6

Trapped moisture can lead to rot.

Question 7

Why shouldn’t a deck be supported off a cantilevered floor rim joist?

Answer 7

The rim joist would not be connected to the house well enough to support the deck.

Question 8

How high must the flashing extend up the wall at the deck wall intersection and why?

Answer 8

150 mm due to possible ice damming.

Question 9

Will Zoning regulations normally let decks extend into side yard setbacks?

Answer 9

Sometimes but not in all cases.

Question 10

What is a deck defined as:

Answer 10

The elevated platform attached to building, although it can be built independently to the building it serves.

Referred to as a sundeck as it isn’t normally roofed.

Close to ground level or several storeys above grade. When elevated to at least one storey above ground, it sometimes referred to as a balcony.

Question 11

What is a Veranda?

Answer 11

Typically a veranda is a much longer than deep and will run the full length of a building face.

Question 12

The basic purpose of a deck is to provide:

Answer 12

Level outdoor living space.

Question 13

Decks need to bebuilt to stand up to:

Answer 13

Local snow load or floor loads for living area

Question 14

Decks & Railing are considered components of:

Answer 14

Exterior finishings for residential buildings.

Question 15

Deck joists are sheathed with:

Answer 15

Waterproof finish topping a subfloor or decking

Question 16

Deck foundations are usually:

Answer 16

Pilings, pads, blocks or strip footings.

Question 17

Substructure of deck is set on posts of what width?

Answer 17

140 mm X 140 mm.

Question 18

What size column is used for decking posts?

Answer 18

200 x 200 mm rectangular concrete column

Question 19

What diameter round concrete column:

Answer 19

230 mm diameter round column

Question 20

Diameter of steel post for decking:

Answer 20

73 mm

Question 21

Connection of deck joists made by:

Answer 21

Nailing, screwing, bolting or by using metal connectors.

Question 22

How are decks attached to buildings?

Answer 22

Joists on the ledger fastened to a building, and joist hangers hung from the ledger.

Using lag screws, nails, or solid wall fasteners for attaching ledgers.

Question 23

SUpporting a deck from rim joist of a cantilvered floor:

Answer 23

Not strong enough, only has the support of nails into the ends of floor joists.

Question 24

Common deck surfaces:

Answer 24

5/4 radius edge-treated lumber
2x4 cedar
TNG but not for sundecks, as it will swill & shrink in weather.
Composite.

Question 25

Advantage of WPC (Composite Deckings)

Answer 25

Wont twist, check, crack splinter or rot.

Scratch and stain-resistant. Doesn’t require sanding. staining or painting.

Question 26

What is a proper gap for decking?

Answer 26

3-6 mm gap provides adequate air movement and drainage, and is not so wide that items such as pens, toys or cutlery can slip through the deck.

Question 27

Watertight decks acting as a roof: Posts must be:

Answer 27

Face attached instead of top mounted in order to maintain watertightness.