H10-DECKS Flashcards
how much lower are decks built from the floor level inside the building?
and why?
150mm lower than the floor they serve, this is done to prevent water seepage into the interior living space due to ice damming on the deck surface
other than being attached to a building, what else can a deck be with the building system?
A deck can be apart of the buildings roof system, example is a garage with a flat roof and use that area as a deck
the deck has two purposes, act as a deck and as a roof
what is the basic purpose of a deck?
Provide a level outdoor livingspace
what are common materials for decking construction?
what about railings materials?
Pressure treated preserved wood, naturally durable wood such as cedar, and wood-plastic composites
wood, metal, and glass
When building a deck a ledger must be spaced off the wall for what reason?
To allow air movement around it
what are a decks structural components?
foundation, posts, beams, and floor joists
what should be considered when planning for a deck system?
- Safety considerations
- BC Building Code
- Zoning Requirements
- CC&R’s Covenants, Conditions and Restrictions
how far must concrete columns extend above finished grade?
200mm and provide a framing attachment
when is a deck not required to be sloped?
when the decking is spaced to allow good drainage
what should you do before you start excavating?
what is required for empty footing holes when workers aren’t present?
Call BC One Call (1-800-474-6886) for locations of underground services
Cover all empty footing holes
What is required for ventilation if the deck acts a roof over a heated area?
Cross purlins
how high should siding be above the surface of decking?
`2” (50mm)
for watertight decks acting as a roof, how are the posts of handrails attached?
should be face attached instead of top mounted to maintain watertightness
List three ways the connections for deck joists and beams can be made?
by using fasteners, connecting brackets, and hangers
brackets and hangers are galvanized
galvanized nails or corrosion resistant screws must be used
what is the height of the deck guardrails if the deck is below & above 1.8m?
900mm if the deck is less, 1070mm if the deck is above
what is a deck called with a roof and part of an entrance?
referred to as a porch
for watertight decks acting as a roof, how are the posts of handrails attached?
should be face attached instead of top mounted to maintain watertightness
Before excavating what should you do
Call BC one call four locations of underground services
What’s the difference between a deck in the porch?
A porch is roofed and is usually part of an entrance
what is a deck that isn’t provided with a roof?
referred to as a sundeck
If the jack is required to have a proper foundation and has to meet the footings of the house
Concrete columns must extent at least 200 m m above finish grade and provide framing attachment
what are typical foundations for decks?
(what the posts will sit on)
Concrete pilings, pad blocks, or strip footings
how long should decking fasteners be?
long enough to penetrate the joists by at least the decking thickness
what is the basic purpose of a deck?
Provide a level outdoor livingspace
what is a deck called with a roof and part of an entrance?
referred to as a porch
what are the concrete pier dimensions?
(for proper foundation)
200mm by 200mm for rectangle pier, 230mm for a round pier are centred on the footing pads
Can you support a deck from a rim joist of a cantilever deck floor? True or false
False you cannot support a deck on ends of floor joists
When a deck is the surface with a waterproof fiberglass or rubberized membrane what is important
A.
B.
Is it with exterior plywood And sloped
Why my decks be sturdily constructed
They must be able to support snow loads and large groups of people when covid is not existent
how much lower are decks built from the floor level inside the building?
and why?
150mm lower than the floor they serve, this is done to prevent water seepage into the interior living space due to ice damming on the deck surface
List three ways the connections for deck joists and beams can be made?
by using fasteners, connecting brackets, and hangers
brackets and hangers are galvanized
galvanized nails or corrosion resistant screws must be used
What must be installed at all exterior edges of the deck
Drip edge
what are advantages of Wood Plastic Composite decking?
they won’t twist, check, crack, splinter, or rot
What’s the purpose for cantilevering beams and joist
Reduce the clear span in make layout and construction easy
what are the two reasons decks should be built strong and securely fastened to the main structure?
Been known to collapse when used as a venue for a large group, and to separate when impacted by a large snow load (snow sliding off a metal roof)
what are typical foundations for decks?
(what the posts will sit on)
Concrete pilings, pad blocks, or strip footings
what are the dimensional sizes for concrete columns? rectangular and round
dimensional size for steel posts?
200mm x 200mm for rectangular, 230mm diameter round
73mm diameter steel posts
what are advantages of Wood Plastic Composite decking?
they won’t twist, check, crack, splinter, or rot
BC Building Code require railings when the deck is elevated more than?
600mm above adjacent surfaces
how much lower are decks built from the floor level inside the building?
and why?
150mm lower than the floor they serve, this is done to prevent water seepage into the interior living space due to ice damming on the deck surface
All decks, that have Wall intercessions how high must have finished extended wall be
150 mm because of possible ice
what size are common dimensional lumber posts?
most common are 6x6 (140mm x 140mm)
Decks can also be a part of what other system on the house
The roofing system
BC Building Code require railings when the deck is elevated more than?
600mm above adjacent surfaces
Shouldn’t a deck be supported or cantilever floor rim joist
Not strong enough to support the gut
what will construction drawings help with?
- eliminating design errors
- calculating materials
- increases efficiency and normally results in a superior finished product
How deep is a deck foundation required to be?
It must be as deep as required for the building it serves unless it meets the requirements.
1) Not more than 55 m2 (592 ft2) in area.
2) Not supporting a roof
3) Distance from grade to the underside is not more than 600 mm and when attached to a structure the differential movement of the deck will not adversely affect the structure
other than being attached to a building, what else can a deck be with the building system?
A deck can be apart of the buildings roof system, example is a garage with a flat roof and use that area as a deck
the deck has two purposes, act as a deck and as a roof
why is anchorage important for high level decks?
because of possible wind uplift
how can you reduce clear spans of structural members?
by slightly cantilevering the beams and joists
what is another term for porch?
veranda, typically is much longer than deep and will run the full length of the building face
what is the gap you provide between decking boards?
3-6mm provides adequate air movement and drainage
what size are common dimensional lumber posts?
most common are 6x6 (140mm x 140mm)
how long should decking fasteners be?
long enough to penetrate the joists by at least the decking thickness
What’s the advantages of wpc over dimensional lumber, for a deck surface
Wood plastic composite won’t twist check, crack or splinter or rot and it is scratched and strain resistant. Where dimensional lumber is diametrically unstable
why can’t you support (attach) a deck to a cantilevered floor rim joist?
Rim joist is usually only supported by nails into the ends of floor joists and is not strong enough to hang a deck from
what is a deck that isn’t provided with a roof?
referred to as a sundeck
When children are playing on the deck do you use pressure-treated lumber in an area that has extreme rain
No, pressure treated lumber should not be used where children play
what are common materials for decking construction?
what about railings materials?
Pressure treated preserved wood, naturally durable wood such as cedar, and wood-plastic composites
wood, metal, and glass
what are a decks structural components?
foundation, posts, beams, and floor joists
What is the concerned when using a larger without spacers against the house
Trap moisture leading to rot unless protected from moisture by flashing
If it that goes around a swimming pool what is required,
Non-slip surfaces are needed
BC Building Code require railings when the deck is elevated more than?
600mm above adjacent surfaces
decks need to be built strong enough to withstand?
either floor loads for living areas or local snow loads, which ever is greater
what is the basic purpose of a deck?
Provide a level outdoor livingspace
what is another term for porch?
veranda, typically is much longer than deep and will run the full length of the building face
how high up does BC Building Code require flashing of the deck wall intersection extend up the wall?
6” behind the sheathing paper
for watertight decks acting as a roof, how are the posts of handrails attached?
should be face attached instead of top mounted to maintain watertightness
what is a deck called with a roof and part of an entrance?
referred to as a porch
What are four basic structural parts of a deck
Foundation, post, beans, Joist
what is the basic purpose of a deck?
Provide a level outdoor livingspace
What kind dimensional lumber is the substructure of a deck commonly made from?
Dimensional framing set on 140 mm x 140 mm posts.
Poles, pilings and timbers may sometimes be used as well.
how long should decking fasteners be?
long enough to penetrate the joists by at least the decking thickness
When planning a deck it’s important to check
Property land title, restrictions as styles, materials, furnishings, setbacks, Heights
Zoning regulations normally let decks extend into the side yard setbacks
Yes in many cases but not all cases
what is the gap you provide between decking boards?
3-6mm provides adequate air movement and drainage
When building a deck all joist must have a bearing of
38 mm on beams
what are common materials for decking construction?
what about railings materials?
Pressure treated preserved wood, naturally durable wood such as cedar, and wood-plastic composites
wood, metal, and glass
What is the slope typically for a deck
2% slope quarter inch per foot
what is another term for porch?
veranda, typically is much longer than deep and will run the full length of the building face
what is the concern when using a ledger without spacers against the house wall?
trapped moisture leading to rot (unless protected from moisture by flashing)
Deck coating membranes must be certified as
Roofing material,
All fasteners in hangars use with pressure-treated lumber must be
Corrosive resistant
Decking over garages and living spaces need to be
Waterproof
what is the gap you provide between decking boards?
3-6mm provides adequate air movement and drainage
Does the BC building code require a deck to have a proper foundation
Know if it’s less than 55 m squared, Less than 592ft2 Not supporting the roof The distance from the underside of the joist is not more than 600mm
why is it important to check with zoning bylaws?
decks that aren’t roofed, usually not included in when calculating building area but usually included when calculating lot coverage
when a deck is elevated to at least one storey above ground it is called?
referred to as a balcony
How deep is a deck foundation required to be
It must be as deep required for the building it serves unless it’s less than 592 ft and area
what is the slope for a deck that is topped with a waterproof membrane?
(considered a roof)
2% slope (1/4” per ft)
BC Building Code does not require a deck to have proper foundation if?
- area
- support
- grade
- structure
- is not more than than 55m^2 (592ft^2) in area
- not supporting a roof
- the distance from grade to the underside of the joists is not more than 600mm
- when attached to a structure, the differential movement of the deck will not adversely affect the structure
Deck surfaces are usually made up of five quarter lumber. Is it a good idea to use tongue-and-groove?
Tongue and groove lumber is not recommended for exposed on roof decks since it will swell and shrink with exposure to water. Tongue and groove can’t wrap water and cause rot in joints
what are the guidelines for working with pressure treated lumber?
- Wear a mask, eye protection, cover skin when cutting or sanding treated wood
- Wear gloves when working with treated wood
- Wash hands before eating any food
- Do not burn preserved wood (smoke is toxic)
- Do not used preserved wood as mulch
- Be aware that preservatives may dislodge from wood and migrate into the soil or groundwater. Care must be taken to prevent this from happening
- Properly store or dispose of any leftover preservative, brushes and rags that were used to treat end cuts
- All fasteners and hangers used must be of a type that is compatible with the preservative used on the deck material as it can be very corrosive to metal
what are the dimensional sizes for concrete columns? rectangular and round
dimensional size for steel posts?
200mm x 200mm for rectangular, 230mm diameter round
73mm diameter steel posts
when a deck is elevated to at least one storey above ground it is called?
referred to as a balcony
why can’t you support (attach) a deck to a cantilevered floor rim joist?
Rim joist is usually only supported by nails into the ends of floor joists and is not strong enough to hang a deck from
For decks to be waterproof what’s the best way to attach the railing post
Face attached instead of top-mounted
if the concrete pads aren’t spaced any farther than 3m o.c., what is the pad footing requirement?
(for proper foundation)
0.4m^2 concrete pad footings
The minimum height of deck guard rails must be
1070mm if the deck is more than 1.8 metres off the ground
what are the dimensional lumber used for decking?
5/4” radius edge-treated lumber, or 2x4 cedar
how can you attach the deck to the building?
fastening a ledger board or using joist hangers.
use lag screws, nails, or solid wall fasteners for attaching ledgers
what are the two reasons decks should be built strong and securely fastened to the main structure?
Been known to collapse when used as a venue for a large group, and to separate when impacted by a large snow load (snow sliding off a metal roof)
If a deck is used as a play surface, what kind of decking should be used?
anything that isnt pressure treated (WPC, surfaced waterproof fibreglass are alternatives)
what are you checking for, from property Land Title?
Restrictions as to styles, materials, finishes, setbacks, or heights
what are a decks structural components?
foundation, posts, beams, and floor joists
why is anchorage important for high level decks?
because of possible wind uplift
other than being attached to a building, what else can a deck be with the building system?
A deck can be apart of the buildings roof system, example is a garage with a flat roof and use that area as a deck
the deck has two purposes, act as a deck and as a roof
how can you attach the deck to the building?
fastening a ledger board or using joist hangers.
use lag screws, nails, or solid wall fasteners for attaching ledgers
how can you reduce clear spans of structural members?
by slightly cantilevering the beams and joists
what is a deck that isn’t provided with a roof?
referred to as a sundeck
when do municipalities treat decks as landscaping?
when the deck is not attached to a structure and the surface is less than 600mm above ground
what are the dimensional sizes for concrete columns? rectangular and round
dimensional size for steel posts?
200mm x 200mm for rectangular, 230mm diameter round
73mm diameter steel posts
what kind of preservative is used in today’s age? and which isn’t used anymore?
Alkaline Copper Quaternary (ACQ), Chromated Copper Arsenate (CCA)
CCA isnt used anymore cause of the arsenic
when a deck is elevated to at least one storey above ground it is called?
referred to as a balcony
what are advantages of Wood Plastic Composite decking?
they won’t twist, check, crack, splinter, or rot
If the deck is less than 1.8 m above the ground how high May the guardrail be
900 mm
what is including in deck drawings?
- foundation plan
- cross section showing framing
- decking and railing details
- plus a floor plan showing dimensions
- guard rail post locations
- any other details such as lighting, planters, and benches
What is the typical order of operation for deck construction
Install concrete footings, columns or pillars Install post and beams Install a joist and other framing Install decking and waterproof membrane if applicable
what are the requirements if the deck is required to have a proper foundation?
must meet the same required depth that the house foundations are required to meet
how can you attach the deck to the building?
fastening a ledger board or using joist hangers.
use lag screws, nails, or solid wall fasteners for attaching ledgers
what size are common dimensional lumber posts?
most common are 6x6 (140mm x 140mm)
decks need to be built strong enough to withstand?
either floor loads for living areas or local snow loads, which ever is greater
how can you reduce clear spans of structural members?
by slightly cantilevering the beams and joists
what are typical foundations for decks?
(what the posts will sit on)
Concrete pilings, pad blocks, or strip footings
what are the dimensional lumber used for decking?
5/4” radius edge-treated lumber, or 2x4 cedar
why can’t you support (attach) a deck to a cantilevered floor rim joist?
Rim joist is usually only supported by nails into the ends of floor joists and is not strong enough to hang a deck from
what is the concern when using a ledger without spacers against the house wall?
trapped moisture leading to rot (unless protected from moisture by flashing)
what are the two reasons decks should be built strong and securely fastened to the main structure?
Been known to collapse when used as a venue for a large group, and to separate when impacted by a large snow load (snow sliding off a metal roof)
decks need to be built strong enough to withstand?
either floor loads for living areas or local snow loads, which ever is greater
what is the concern when using a ledger without spacers against the house wall?
trapped moisture leading to rot (unless protected from moisture by flashing)
what are the dimensional lumber used for decking?
5/4” radius edge-treated lumber, or 2x4 cedar
List three ways the connections for deck joists and beams can be made?
by using fasteners, connecting brackets, and hangers
brackets and hangers are galvanized
galvanized nails or corrosion resistant screws must be used
Why is Anchorage important for high-level
Because of uplift winds
What are CC and rs
Zoning regulations, covenants
When building a deck surface what is a great spacing for the deck surface
3-6 mm Gap provides accurate air movement and drainage
Decks must have a railing system if it’s above how far from an adjacent surface
600 mm
If the deck is not attached to a structure and less than 600 mm above grade what will some municipalities considerate
Deck as landscaping not require a permit
why is anchorage important for high level decks?
because of possible wind uplift
