Surface materials:
The allowable foundation pressure for sandy clay is _______ pounds per square foot. For bedrock it is ________ pounds per square foot.
1500 / 12,000
p184
Surface materials:
Test pits are usually up to a depth of about ____ feet.
8
p 184
Surface materials:
The use of a test pit permits the ________ of the soil to be observed and measured.
strata
p 184
Strata
p 184
Surface materials:
Test boring are used at depths ________ than those of test pits.
greater
p 184
Surface material
A test boring can provide information on the bearing capacity of soil through the use of a __________ __________.
driving hammer
p 184
Types of foundations
The main factors that determine the type of foundation to be used for a building are the ______ ____________ and the ____________ ______________.
soil conditions / structural configurations
p 185
Foundations are divided into two types: __________ and _______.
shallow and deep
p 185
A shallow foundation transfers the weight of the building to the soil at the ?
base of the building
p 185
A shallow foundation can be used where the ______-_________ ability of the soil directly under the building is adequate to support the building.
load-bearing
p 185
Shallow foundations usually make use of __________ to transmit the load to the soil.
footings
p 185
Footing
p 185
The increased area of the footing reduces the _____________ stress on the soil.
compressive
p 185
A _______ __________ is a continuous strip of concrete that supports a wall.
wall footing
p 185
Column Footing
p 186
Grillage Footing
p 186
When the load bearing capacity of the soil beneath a building is low, the footing must be large in area and a ______ ____________ may be used.
mat foundation
p 186
Mat Foundation
p 186
A mat foundation differs from a simple floor slab in its ___________ and amount of ______________.
thickness / reinforcement
p 186
A mat may be several ______ thick and heavily reinforced, whereas a slab may only be a ______ thick.
feet / foot
p 186
Floating foundation
p 187
Deep foundations are more ________ than shallow foundations, so are used only where shallow foundations cannot be used.
costly
p 187
Deep foundations take the form of either _______ or ______.
piles or piers
p 187
_______ are driven into the ground and develop their load carrying ability either through friction with the surrounding soil or by being driven into contact with rock or a load bearing soil layer.
Piles
p 187