Foundation Types: Difference between revisions
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=Terms= | =Terms= | ||
*Grade beam - while not seen in typical slab-on-grade diagrams - it is the thickened part of a slab-on-grade - [https://www.eng-tips.com/viewthread.cfm?qid=437865] | |||
*Slab is easier and cheaper to build than a pier and beam foundation. [https://www.safoundationrepaircompanies.com/about-us/blog/2015/05/pier-and-beam-vs-concrete-slab-which-foundation-is-right-for-you/#:~:text=While%20a%20pier%20and%20beam,being%20built%20on%20flat%20lots.] | |||
*Grade Beam - [https://civiljungle.com/grade-beam/] | *Grade Beam - [https://civiljungle.com/grade-beam/] | ||
*Grade beam is the thickened outer edge of the slab foundation. [https://www.google.com/search?q=slab+foundation+vs+grade+beam&oq=slab+foundation+vs+grade+beam&aqs=chrome..69i57j33i160l2j33i22i29i30.6263j0j9&client=ubuntu&sourceid=chrome&ie=UTF-8] | |||
*Spread footing - 'inverted T' actually holds the pressure on the soil. Grade beam functions like a beam - spanning 2 deep piles, not relying on soil underneath for support. [https://alleghenydesign.com/most-common-construction-question-grade-beam-or-spread-footing/] | *Spread footing - 'inverted T' actually holds the pressure on the soil. Grade beam functions like a beam - spanning 2 deep piles, not relying on soil underneath for support. [https://alleghenydesign.com/most-common-construction-question-grade-beam-or-spread-footing/] | ||
*Grade beams connect column foundations together - [https://research.engineering.ucdavis.edu/gpa/foundations-shallow/grade-beams/] | |||
*Slab foundations are used on flat lots [https://www.google.com/search?q=slab+foundation+vs+grade+beam&oq=slab+foundation+vs+grade+beam&aqs=chrome..69i57j33i160l2j33i22i29i30.6263j0j9&client=ubuntu&sourceid=chrome&ie=UTF-8]. Supported directly be ground. | |||
*Shallow and deep are 2 general classes. Deep ones go down to bedrock. [https://www.bigrentz.com/blog/types-of-foundations#:~:text=There%20are%20two%20types%20of,columns%20deep%20into%20the%20ground.] | |||
=Design= | =Design= | ||
*Grade beam is min 8" wide, and depth is the length of span it supports [https://www.civillead.com/grade-beam-foundation/] | *Grade beam is min 8" wide, and depth is the length of span it supports [https://www.civillead.com/grade-beam-foundation/] | ||
*Compared to typical foundation, uses less concrete. | *Compared to typical foundation, uses less concrete. | ||
Latest revision as of 00:42, 4 October 2022
Terms
- Grade beam - while not seen in typical slab-on-grade diagrams - it is the thickened part of a slab-on-grade - [1]
- Slab is easier and cheaper to build than a pier and beam foundation. [2]
- Grade Beam - [3]
- Grade beam is the thickened outer edge of the slab foundation. [4]
- Spread footing - 'inverted T' actually holds the pressure on the soil. Grade beam functions like a beam - spanning 2 deep piles, not relying on soil underneath for support. [5]
- Grade beams connect column foundations together - [6]
- Slab foundations are used on flat lots [7]. Supported directly be ground.
- Shallow and deep are 2 general classes. Deep ones go down to bedrock. [8]
Design
- Grade beam is min 8" wide, and depth is the length of span it supports [9]
- Compared to typical foundation, uses less concrete.