GoConqr hat ein neues Design! Sag uns, wie es dir gefällt.

Kostenlos registrieren

Karteikarten

Foundation

Goldie k Building Construction 1 Englisch 29 Karten

Karten in diesem Stapel (29)

  1. 16 WALL FOOTING Rules:1) footings must be at least 6" thick
    2) if footing excavation is too deep, fill with concrete- NEVER with excavated material.
    3) use side forms for footing where soil conditions prevent sharply cut trenches.
    4) minimum depth of footings below grade is established from soil conditions and the depth of frost penetration
    5) reinforce footings with steel rods where they cross pipe trenches which are not well compacted.
    6) in freezing weather, protect concrete with a think layer of straw or other insulating material.
  2. 2COLUMN FOOTINGA) size dependable on
    1- Allowable soil pressure
    2- Supported load
    B) Minimum thickness is 6" AND not less than projection.
    C) A general dimension for stable soil conditions is 4 sft for 1 story house and 6 sft for 2 story house.
  3. 3STEPPED FOOTINGA) required where
    1- Site has a steep sloping
    2- Unstable soil is encountered when excavation takes place
    B) Bottom of footing is always placed on undisturbed soil
    C) the vertical component of the footing should be at least 6" think and the same width as the horizontal component
    D) except in rock, the vertical distance between steps should not exceed 2' and horizontal not be less than 2'.
  4. 4CONCRETE FOUNDATION WALLA) when poring concrete it should be
    1- Done all at once,
    2- Be continuously tamped to remove air pockets and work the material under window frames
    3- Anchor bolts for sill should be place while concrete is still in plastic condition
    4- Forms should not be removed until concrete can support weight of early construction. (2 days min, 1 week ideal)
    B) Concrete walls can be DAMP-PROOFED with one heavy coat of bituminous material from outside (footing to finished grade-line.
  5. 5what determines the size of a COLUMN FOOTING?1- Allowable soil pressure
    2- Supported load
  6. 6what is the minimum thickness of a COLUMN FOOTING?Minimum thickness is 6" AND not less than projection.
  7. 7Where are STEPPED FOOTINGS required?1- Site has a steep sloping
    2- Unstable soil is encountered when excavation takes place
  8. 8Size of STEPPED FOOTINGS?A) the vertical component of the footing should be at least 6" think and the same width as the horizontal component
    B) except in rock, the vertical distance between steps should not exceed 2' and horizontal not be less than 2'.
  9. 9what are the types of LOADS?A) Live loads (occupants and contents)
    B) dead loads (the buildings weight)
  10. 10What role does a FOUNDATION play?A) transmits loads to the ground
    B) prevents uplifting of building
    c) prevents racking of building
    d) resist ground pressure
  11. 11What do you call the above ground part of a building?Superstructure
  12. 12What do you call the below grade part of a structure?substructure
  13. 13What soil conditions are not ideal for foundations?A) Unstable soils
    B) organic soil
    C) wet clay
    D) ground with poor drainage
  14. 14General estimating formula for size of FOUNDATION WALL FOOTING (stable soil)with = 2x thickness of foundation wall
    thickness = thickness of foundation wall BUT at least 6" thick
  15. 15General estimating formula for size of COLUMNS AND PIERS FOOTING (stable soil)A = P/S
    A = horizontal bearing surface of footing
    P = column loads in pounds
    S = soil bearing capacity in lbs/sf
  16. 16IMAGE of sliding (get image from 3.2 chang book)Sliding (get image from 3.2 chang book)
  17. 17Image of Overturning (get image from 3.2 chang book)Overturning (get image from 3.2 chang book)
  18. 18When is STEEL REINFORCEMENT required in footings?When footing projects more than half of the foundation wall thickness and becomes subject to bending.
  19. 19What is the minimum distance STEEL REINFORCEMENT bars are positions from the bottom of footings when placed horizontally in footings to prevent bending?3" (get image from 3.2 chang book)
  20. 20How do you prevent an uneven selementBy laying out and proportioning foundation support so that they transmit an equal load per unit area to the soil
  21. 21What causes SETTLEMENT?Settlement is due to compression of supporting soils resulting from a reduction in the volume of its voids
  22. 22At what degree do you drain water from building at grade?3% if grass
    1% if paved
  23. 23How do you protect basement from water? Including due to capillary actionA) waterproof the walls and floor slab
    B) place perimeter drainage system to collect and divert water away from foundation.
    C) if soil cohesive soils that cause water to rise through capillary action, a combination of granular base materials and vapor barriers should be used.
  24. 24What is it called when ice pushes foundation up?Ground Heaving
  25. 25How do you minimize GROUND HEAVING?by placing footings below the lowest deepest front penetration at the building site.
  26. 26Why should footings not be placed on frozen ground?Because as the ice melts the excess water can cause the soil to lose much of tis bearing capacity.
  27. 27Image of Bell Calson (image from 3.4 chang)Bell Calsson (image from 3.4 chang)
  28. 28Image of Socketed Calson (image from 3.4 chang)Socketed Calson (image from 3.4 chang)
  29. 29What loads act on a foundation wall?A) Live load
    B) Dead load
    C) Soil pressure load.
    D) Water pressure especially if foundation is under water-table.

Informationen

Beschreibung
1 Building Construction Karteikarten am Foundation , erstellt von Goldie k am 08/05/2015.
Erstellt von
Goldie k · Mai 2015
Aktualisiert
7 Mär 2018
Aufrufe
0
Bewertung

Feedback

Worum geht es?

Wie gefällt dir das neue Design?

Dein Eindruck