H7 - Decks - LT #4 Flashcards
What is a porch?
Roofed deck, part of the entrance
Four basic structural parts of a deck?
Foundation, posts, beam, and joists
Why is anchorage important for high-level decks?
Possible wind uplifts
What is the purpose for cantilevering beams & joists?
Reduce clear span and makes layout and construction easier
List three ways the connections for deck joists and beams can be made:
Using Fasteners, connecting brackets & hangers
What is the concern when using a ledger without spacers against the house wall?
Trapped moisture can lead to rot.
Why shouldn’t a deck be supported off a cantilevered floor rim joist?
The rim joist would not be connected to the house well enough to support the deck.
How high must the flashing extend up the wall at the deck wall intersection and why?
150 mm due to possible ice damming.
Will Zoning regulations normally let decks extend into side yard setbacks?
Sometimes but not in all cases.
What is a deck defined as:
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.
What is a Veranda?
Typically a veranda is a much longer than deep and will run the full length of a building face.
The basic purpose of a deck is to provide:
Level outdoor living space.
Decks need to bebuilt to stand up to:
Local snow load or floor loads for living area
Decks & Railing are considered components of:
Exterior finishings for residential buildings.
Deck joists are sheathed with:
Waterproof finish topping a subfloor or decking
Deck foundations are usually:
Pilings, pads, blocks or strip footings.
Substructure of deck is set on posts of what width?
140 mm X 140 mm.
What size column is used for decking posts?
200 x 200 mm rectangular concrete column
What diameter round concrete column:
230 mm diameter round column
Diameter of steel post for decking:
73 mm
Connection of deck joists made by:
Nailing, screwing, bolting or by using metal connectors.
How are decks attached to buildings?
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.
SUpporting a deck from rim joist of a cantilvered floor:
Not strong enough, only has the support of nails into the ends of floor joists.
Common deck surfaces:
5/4 radius edge-treated lumber
2x4 cedar
TNG but not for sundecks, as it will swill & shrink in weather.
Composite.
Advantage of WPC (Composite Deckings)
Wont twist, check, crack splinter or rot.
Scratch and stain-resistant. Doesn’t require sanding. staining or painting.
What is a proper gap for decking?
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.
Watertight decks acting as a roof: Posts must be:
Face attached instead of top mounted in order to maintain watertightness.
