Glencoe: 18 Flashcards
Porosity:
measure of the ability of water to flow through the soil
What happens if the soil does not drain well?
Material may have to be excavated and replaced with better soil.
Test borings will also:
identify problems that could significantly affect the cost of the house. Such as rock ledge and high water table
Types of earth moving equipment used for basement excavations:
power shovel, backhoe.
Topsoil is often stockpiled by a
bulldozer, front-end loader, or a grader.
Why is topsoil stockpiled?
for future use as in grading the site.
X are often used in excavating the slab footings or shallow foundation walls
power trencher.
It is best to excavate only until
the top of the foundation foots are the bottom of the basement floor.
When is it advisable to make the final excavation for footings and why:
When its nearly time to pour to concrete.
Because some soil becomes soft upon exposure to air or water.
Excavation must be:
wide enough to do work. such as install and remove concrete forms, lay up block and waterproof the exterior surface of the walls, install foundation drainage.
Overdig:
additional excavation needed to provide clearance for the work.
Backslope:
Sides of the excavation are sloped to prevent them from caving.
Footing:
the base that provides a surface that distributes weight over a wide area of soil.
Footings are generally made of
concrete
Footings are usually built
first and then foundation wall is built later
