Construction

Man powers his home from local stream with DIY micro-hydro plant. A man named Manfred Mornhinweg found the modern world too "noisy and hectic", so he decided to build himself a house on a quiet 40 hectare piece of land in Chile.

Part of his project involved building a micro-hydro plant to generate electricity for his dream home, and he documented the DIY adventure on his (very old-school) website. I found it interesting, and though that you might enjoy it too. Unfortunately, there's no single photo that gives an overview of the whole micro-hydro plant, but this generic drawing gives a good idea of the concept: United States Department of Energy/Public Domain Here are a few photos from the project: © Ludens This is the outflow from the turbine, where the "poor, tired water" (said tongue-in-cheek, of course -- the water's fine) comes out after doing the hard work of spinning the turbine that generates the electricity.

For the whole thing, visit Ludens. See also: DIY Backyard solar death ray (Video) Gradient, Slope, Grade, Pitch, Rise Over Run Ratio Calculator. Bicyclists, motorists, carpenters, roofers and others either need to calculate slope or at least must have some understanding of it.

Slope, tilt or inclination can be expressed in three ways: 1) As a ratio of the rise to the run (for example 1 in 20) 2) As an angle (almost always in degrees) 3) As a percentage called the "grade" which is the (rise ÷ run) * 100. Of these 3 ways, slope is expressed as a ratio or a grade much more often than an actual angle and here's the reason why. Stating a ratio such as 1 in 20 tells you immediately that for every 20 horizontal units traveled, your altitude increases 1 unit. Stating this as a percentage, whatever horizontal distance you travel, your altitude increases by 5% of that distance. Stating this as an angle of 2.8624 degrees doesn't give you much of an idea how the rise compares to the run. Calculating Grade By Measuring The Road Distance run = Square Root (15,844.95² - 396²) run = 15,840 feet Calculating Grade By Using Slope Distance. Taco-Hvac. Earthbag Construction.

EarthBag Homes - you're standing on the building materials... earthbag home Long sandbags are filled on-site and arranged in layers or as compressed coils.

Stabilizers such as cement, lime, or sodium carbonate may be added to an ideal mix of 70% sand, 30% clay. Straw may also be added. The earthbags are then plastered over with adobe. Arquitectura en Equilibrio (Architecture in Balance) flickr.com earthbag home Plastic bags recycled into plastic bags -- if plastic does not break down for a thousand years, this building is sure to last several lifetimes. Earthbag construction Foundations differ as per site. Earthbag construction The time consuming part, filling the bags. Earthbag construction Testing the strength of an arch.

Earthbag home Project Seres, Guatemala. projectseres.org, flickr.com earthbag home CalEarth -- Emergency Shelter Village, Hesperia, California. Earthbag home Cal Earth -- Emergency Shelters. Earthbag home CalEarth let the layers show. Resources: Lessons: More Pictures:

Green

Superb Idea: A Transparent Drain - Design. Construction Management.