Podcast
Questions and Answers
Finish grade shall fall _____ over _____ away from foundation.
Finish grade shall fall _____ over _____ away from foundation.
6 in. over 10 ft
What is the compressive strength of cast-in-place foundation walls or basement walls that are not exposed to the weather?
What is the compressive strength of cast-in-place foundation walls or basement walls that are not exposed to the weather?
2,500 PSI
What is the compressive strength of basement slabs or interior slabs on grade that are not exposed to the weather?
What is the compressive strength of basement slabs or interior slabs on grade that are not exposed to the weather?
2,500 PSI
What is the compressive strength of cast-in-place foundation walls or basement walls exposed to the weather?
What is the compressive strength of cast-in-place foundation walls or basement walls exposed to the weather?
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What is the compressive strength of patio/porches or carport/garage slabs or exterior steps exposed to the weather?
What is the compressive strength of patio/porches or carport/garage slabs or exterior steps exposed to the weather?
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What is the compressive strength of pre-cast concrete foundation/basement walls?
What is the compressive strength of pre-cast concrete foundation/basement walls?
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What is the compressive strength of masonry system foundation/basement walls?
What is the compressive strength of masonry system foundation/basement walls?
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Footings shall have a minimum of #____ vertical bar spaced ____ ft o.c.
Footings shall have a minimum of #____ vertical bar spaced ____ ft o.c.
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Vertical footing rebar shall extend a minimum of _____ into stem wall from footing.
Vertical footing rebar shall extend a minimum of _____ into stem wall from footing.
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Horizontal #___ rebar shall run a minimum of ____ inches from top of stem wall.
Horizontal #___ rebar shall run a minimum of ____ inches from top of stem wall.
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Footing shall have a level top surface and a bottom surface not to exceed _____ slope.
Footing shall have a level top surface and a bottom surface not to exceed _____ slope.
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Foundation anchorage shall be used a minimum of _____ o.c. and shall be a minimum of ____ in. diameter anchor bolts.
Foundation anchorage shall be used a minimum of _____ o.c. and shall be a minimum of ____ in. diameter anchor bolts.
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Anchor bolts shall extend a minimum of ____ inches into foundation wall.
Anchor bolts shall extend a minimum of ____ inches into foundation wall.
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Minimum sill anchorage into foundation shall be ____ anchors at max. ____ inches from ends.
Minimum sill anchorage into foundation shall be ____ anchors at max. ____ inches from ends.
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Slump of concrete cannot exceed ____ inches.
Slump of concrete cannot exceed ____ inches.
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Foundation drains shall be located ____ inches above top of footing and shall not extend less than _____ from outside edge of footing.
Foundation drains shall be located ____ inches above top of footing and shall not extend less than _____ from outside edge of footing.
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Foundation drains shall be installed around foundations that retain earth and enclose __________ and ________ spaces located below grade.
Foundation drains shall be installed around foundations that retain earth and enclose __________ and ________ spaces located below grade.
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Foundation drainage material shall be __________ or ___________ or _________.
Foundation drainage material shall be __________ or ___________ or _________.
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Foundation drain shall be covered with ___________ material.
Foundation drain shall be covered with ___________ material.
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Perforated pipe foundation drain installed on ______ inch of gravel, surrounded by ______ inches of gravel.
Perforated pipe foundation drain installed on ______ inch of gravel, surrounded by ______ inches of gravel.
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Dampproofing of foundation walls is required from the __________ to the _________ or ___________ (whichever is higher).
Dampproofing of foundation walls is required from the __________ to the _________ or ___________ (whichever is higher).
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Any space under floor joists and above earth needs to have _____________
Any space under floor joists and above earth needs to have _____________
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Ventilation openings shall be __ sf for every ___ sf of internal space/area.
Ventilation openings shall be __ sf for every ___ sf of internal space/area.
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At least ___ ventilation opening shall be within ______ ft of a corner.
At least ___ ventilation opening shall be within ______ ft of a corner.
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Access to crawl spaces shall be minimum x_ for floor openings and x_ for exterior wall openings.
Access to crawl spaces shall be minimum x_ for floor openings and x_ for exterior wall openings.
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What is the loadbearing value of sedimentary and foliated rock?
What is the loadbearing value of sedimentary and foliated rock?
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The thickness of concrete foundation walls shall be equal or greater than ____.
The thickness of concrete foundation walls shall be equal or greater than ____.
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In other than ________ soil group, a sump, not less than 24 inches in diameter or 20 inches square shall be provided to drain the porous layer and footings.
In other than ________ soil group, a sump, not less than 24 inches in diameter or 20 inches square shall be provided to drain the porous layer and footings.
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All surfaces (both inside and outside) of steel columns shall be given a shop coat of rust-inhibitive paint, except for when _____
All surfaces (both inside and outside) of steel columns shall be given a shop coat of rust-inhibitive paint, except for when _____
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Study Notes
Foundation Construction Standards
- Finish grade must slope 6 inches over 10 feet away from the foundation.
- 2,500 PSI is the required compressive strength for non-weather-exposed cast-in-place foundation and basement walls.
- 3,000 PSI compressive strength is necessary for cast-in-place foundation walls exposed to weather and for patio/porches, carport/garage slabs, or exterior steps.
- 5,000 PSI is needed for pre-cast concrete foundation/basement walls.
- 1,500 PSI is the compressive strength requirement for masonry system foundation/basement walls.
Rebar and Footing Specifications
- Footings must include a minimum of #4 vertical rebar spaced 4 feet on center (o.c.).
- Vertical footing rebar should extend a minimum of 14 inches into the stem wall from the footing.
- Horizontal #4 rebar should be at least 12 inches from the top of the stem wall and 3-4 inches from the bottom of the footing.
- Footings must have a level top surface with a maximal slope of 1:10 (10%).
Foundation Anchorage
- Foundation anchorage shall be installed every 6 feet o.c. with a minimum diameter of 1/2 inch anchor bolts.
- Anchor bolts must extend at least 7 inches into the foundation wall.
- Minimum anchorage for sill plates requires 2 anchors at a maximum of 12 inches from the ends.
Concrete Quality and Drainage
- Concrete slump must not exceed 6 inches.
- Foundation drains must be located 6 inches above the top of the footing and should not be less than 1 foot (12 inches) from the outside edge of the footing.
- Drains are mandatory around foundations that enclose habitable and usable spaces below grade.
Drainage Materials
- Foundation drainage materials can include gravel/crushed stone, perforated pipe, or drainage tiles.
- Drains must be covered with a filter membrane material.
- Perforated pipe foundation drains are placed on 2 inches of gravel/crushed stone and surrounded by 6 inches of gravel.
Dampproofing and Ventilation
- Dampproofing of foundation walls must be applied from the finished grade to the top of the footing or 6 inches below the interior slab, whichever is higher.
- Spaces under floor joists and above the earth require ventilation.
- Ventilation openings need to be 1 square foot for every 150 square feet of internal space.
Access and Sump Requirements
- At least one ventilation opening must be within 3 feet of a corner.
- Minimum access sizes for crawl spaces are 18 inches by 24 inches for floor openings and 16 inches by 24 inches for exterior wall openings.
- In non-Group I soil, a sump with a minimum dimension of 24 inches in diameter or 20 inches square is required to drain porous layers and footings.
Additional Notes on Steel Columns
- All surfaces of steel columns must be coated with rust-inhibitive paint, except when the column is corrosive resistant steel, and the steel is treated with coatings for corrosion resistance.
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Description
Test your knowledge on the critical concepts of foundations in Chapter 4 of the IRC. These flashcards cover essential definitions and standards regarding finish grade and compressive strength of various concrete structures. Perfect for students and professionals in the construction field.
