Backfilling
This process involves replacing soil around a foundation to support and stabilize it.
What is backfilling?
This system removes excess water from a site to prevent flooding and damage.
What is drainage?
This is a private path that connects a building to a public road.
What is a driveway?
Backfill material is typically made up of these three components.
What are soil, stones, and rocks?
These are the required dimensions for box drains according to SVG standards.
What is at least 2 feet wide and made of concrete?
The recommended minimum width of a residential driveway.
What is 3 meters?
This is how deep each layer of backfill should be before compacting
What is 12 inches?
This is the standard size PVC pipe used for grey or storm water drainage?
What is at least 2 inches?
The maximum slope (gradient) allowed for a driveway to ensure vehicle safety
What is 10% or a 1 in 10 slope?
The reason the area around the foundation is graded after backfilling
What is to promote better water drainage?
For a parapet roof, this size PVC pipe should run through the column for drainage.
What is 3 or 4 inches?
This small feature at a driveway entrance helps guide water runoff and aligns it with the road.
What is a 25 mm (1 inch) kerb upstand?
After completing backfilling, this is often added to help the site blend with its surroundings.
What is sod or grass?
The reason PVC pipe is preferred for drainage systems
What is because it withstands moisture and doesn’t react to chemicals?
Name two important design considerations besides width and gradient for a durable driveway.
What are surfacing and drainage?