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Housing/footprint: Difference between revisions
→Single-detached home
(Created page with "How many resources does it take for people to have housing? This is a page for some estimates. ==Single-detached home== ===Labor=== We could estimate labor by looking at ''some'' costs: * labor costs, obviously * material costs, because these generally reflect the labor that goes into producing the materials We ''don't'' want to count ''other'' costs: * zoning permits and other bureaucracy - maybe these exist in our ''current'' society but they don't ''have to'' exist...") |
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|what_fraction_of_costs_reflect_labor | |what_fraction_of_costs_reflect_labor | ||
|70% | |70% | ||
|The percentage of costs that fit into the categories we care about (mentioned above | |The percentage of costs that fit into the categories we care about (mentioned above) | ||
}} | }} | ||
{{calc | {{calc | ||
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<!-- TODO: compare with other estimates online, just google how many labor hours go into making a house; double it to assume the labor hours that went into materials (because it's common for materials/constructionlabor ratio to be 50/50) --> | <!-- TODO: compare with other estimates online, just google how many labor hours go into making a house; double it to assume the labor hours that went into materials (because it's common for materials/constructionlabor ratio to be 50/50) --> | ||
===Land=== | |||
For one, there's the land that the house sits on: Quick estimate: | |||
{{dp | |||
|house.lot_size | |||
|7200 square(feet) | |||
| | |||
|https://www.quora.com/What-is-the-average-size-of-a-lot-in-suburbia-If-you-dont-know-the-average-what-is-the-size-of-a-lot-where-you-lived-or-live-in-a-suburban-setting | |||
}} | |||
{{dp | |||
|house.size | |||
|2600 square(feet) | |||
| | |||
|<cite>How Many Trees Does It Take to Build a House?</cite>https://www.thehousedesigners.com/articles/how-many-trees-does-it-take-to-build-a-house.asp#:~:text=House%20Construction&text=To%20keep%20it%20simple%20and,a%202%2C000%20square%20foot%20home.<br /><q>According to the Census Bureau, the average American home built in 2013 was 2,600 square feet"</q> | |||
}} | |||
{{calc | |||
|house.lot_size | |||
| | |||
}} | |||
But also the land that it takes to grow the wood for the house: | |||
{{dp | |||
|boardfoot | |||
|(1/12) cubic(foot) | |||
|Weird unit but ok. | |||
|<cite>How Many Trees Does It Take to Build a House?</cite>https://www.thehousedesigners.com/articles/how-many-trees-does-it-take-to-build-a-house.asp#:~:text=House%20Construction&text=To%20keep%20it%20simple%20and,a%202%2C000%20square%20foot%20home.<br /><q>there are 12 board feet in every cubic foot</q> | |||
}} | |||
{{dp | |||
|house.wood_volume | |||
|16380 boardfoot | |||
|Amount of wood in a typical house | |||
|<cite>How Many Trees Does It Take to Build a House?</cite>https://www.thehousedesigners.com/articles/how-many-trees-does-it-take-to-build-a-house.asp#:~:text=House%20Construction&text=To%20keep%20it%20simple%20and,a%202%2C000%20square%20foot%20home.<br /><q>According to the Census Bureau, the average American home built in 2013 was 2,600 square feet, '''and it would have required 16,380 board feet to build!'''</q> | |||
}} | |||
{{dp | |||
|wood.density | |||
|0.8 g/cm^3 | |||
|For converting between wood mass and wood volume | |||
}} | |||
{{dp | |||
|tree_farm.productivity | |||
|20 tons/hectare/year | |||
|Wood yield of a typical "tree farm" forest | |||
|<cite>Agroforestry Carbon Sequestration</cite>https://www.sustainably.run/co2-verification<br /><q>tree plantations of pine and eucalyptus can sequester an average of 10 tons of carbon per hectare per year.</q><br /><br />Assuming that 50% of the mass of wood is carbon atoms, this means 20 tons of wood per hectare per year. | |||
}} | |||
{{calc | |||
|house.wood_volume * wood.density / house.lifespan / tree_farm.productivity | |||
| | |||
}} | |||
Note: this last answer is ''wrong'' because we don't actually have the numbers yet! | |||
If you have some idea how to estimate the land footprint of other materials, please start the {{talk}}. For now, let's hopefully assume it's small enough to ignore. | |||