F2 - Prepare Site Flashcards
what is the alternative form a gravity fed drainage system?
A pumped system
what should you do if you are excavating near a line?
shut off the services to that line
Existing services should be bedded in what?
Sand
where should the building be if the building is constructed in a floodplain area.
the lowest floor system above the 200 year high-water level
Required height above high tide level can range from?
2m - 10m
what should be done with topsoil on site?
stripped off, piled separately and tarpped over
no work is to take place until what is done to protect the public?
hoarding and barricades set up
what is used to predict environmental consequences?
environmental impact assessment (EIA)
What do Biophysical effects include?
Wildfire, water, soils, or possibly economic or social environments
what is done to remove still water on site?
using wells or well points
what is a perimeter drainage system and where is it located?
Drain tile and or pipe installed at the footing level around the outside
what are most perimeter drain pipes made from today?
PVC
perforated drain pipe has what and is installed how?
2 rows of small holes and is installed with the holes down
True or false. A perforated pipe can be installed level
True, and can also slope away from building
Building Code requires the top of the pipe to be where?
below the bottom of the basement slab
how big typically is drain pipe?
4 inches in diameter
how should 90 degree corners be made?
2 - 45 degree fittings or 1 long sweep
where should a clean out be installed?
the top end of the drainage system, and or where it leaves a building
how much drain rock is needed over top of the pipe for coverage?
150mm (6”)
what should the drain rock not include?
sand or small sediments
what is laid on top of the drain rock?
filter cloth
what is the minimum that grad is to be below top of foundation wall?
6-8 inches min
what can be used instead of a perimeter drainage system and what does is consist of?
a granular drainage system, consists of 5 inch layer under the entire building and extends past 12” past the footings
how thick of granular lay should be in wetter cities?
125mm clean drainage layer
when are sump pumps allowed in the BCBC?
in new construction granular drainage
what is the minimum grade for a storm sewer pipe?
1%
what should a drain pipe lead to if storm sewer or ditch is not available?
a dry well
what is a dry well and how far away from a building should it be?
A large Pit filled with rocks and 5 meters from the building
what should downspouts be connected too?
a separate non perforated PVC pipe drain system
what slope is minimum for the downspout/leader system?
1:100 (1/8th” per foot)
how often should septic tanks be pumped out?
3 to 5 years
where must the drywall bottom be?
above the water table
BCBC requires no rocks ___ mm or larger be allowed in the back fill within ___ mm of a foundation wall
250mm, 600mm
what are some soil materials that should not be in backfill?
sulphates, pyritic materials
what does pyritic do to foundations?
when exposed to air due to weathering, it will expand and cause a foundation wall to collapse
what is a good general rule for sloping material away from building?
slope at least 1.8 meters from the building (6ft)`
moisture in what 2 soils can cause freezing and crack a foundation wall?
silt and clay
what is the min for a foundation wall to extend above grade?
150mm (6”)
siding that is subject to rot must be ___mm above grade and ___ mm above sidewalk
200mm (8”) , 50mm (2”)
what is a swale?
a downward depression to direct water away from the building
how thick is the sand to be under and over a service?
100mm min under, 150mm over
where should a warning tape be set above a service?
600mm 12”
how many days should a foundation be allowed to cure before backfilling?
14 days
What forms Glacial Till?
anything from silt to cobbles
what is something that cause a building to settle?
compaction of soils
question on test: answer
7 inches
what is the main reason for settlement of buildings?
compressibility of the soil
