Filed under: band-saw, ecology, environment, Finland, In English, logging, sawing, sustainable, wood engineering | Tags: band-saw, Finland, forwarder, framesaw, harvester, logging, sawing, sawmill, windmill, woodworking
Ecological – Part III (of VI)
Let us look at the different processes: Woodworking – Logging and sawing
The harvester, on the left. It cuts the tree, debranches it, sprays some urea on the stump, and paint-stripes on the end of the log.
The different colors on the ends of the logs, the paint-stripes, tell the forwarder-operator the length and sort of each tree.
The forwarder-operator can thus sort the logs by picking up one sort at a time.
The wagon of the forwarder can load about ten or more cbm [cubic meters] per time. The logs are taken to the nearest place where the log-trucks can be loaded.
In this video, the harvester cuts, debranches and debarks the logs:
The debarking of the log has many positive aspects when logging in the warm season; the log is not so easily attacked by insects and fungi, the bark that remains in the forest will stay there as nutrients, the mass of the load is reduced by 7 – 8 %, the weight even more as the log dries much faster without bark.
Here you can see how a forwarder works:
Both the harvester and the forwarder are computerized.
To the left is a “Walking Harvester”
The university of Tampere (Finland) and a Finnish company developed a “Walking Harvester” before John Deere bought the company. This harvester is meant for steep hillsides, where safety is very essential when logging in such an environment, and also the environment itself needs to be taken care of. If the earth is very scarred at steep hillsides, the heavy rain and fast melting snow can endanger the soil before nature has taken care of the “scars”. If the soil that keeps the trees growing runs down together with the water, it takes thousands of years to recover the forest – if ever.
The best known example of this are the former dense cedar-forests of Lebanon. First the Foinikians logged the main forests and after that, the Romans logged the rest. After the hills where barred, there was nothing that kept the soil in place.
There are different methods to keep the forests growing for centuries to come. The methods of logging, depends on if the forest is at a big lake or on steep hill. As a rule, forest are logged in zig-zag-corridors, so that the wind can’t get too strong, but blow mainly above the forest.
On the left, a Roman saw-mill found in Asia Minor.
On the right, a commercially made band-saw, Serra. The kerf (the gap that becomes saw-dust) is about 2 mm when you saw with a bandsaw.
A typical kerf for circular log-saws and frame-saws is 5 – 6 mm. It might seem to be a small difference, but the fact is that from one medium-size log, you can get one extra board. That makes a big difference at the end of the day – especially if the logs are of the highest quality such as knotless logs. The knotless boards, for example which the carpenters make boats from, do not come cheap.
The downside with a band-saw is that it is slower, but one thing which compensates this fact is that it uses much less electrical power.
The framesaw, to the left, has a set of fixed saw-blades, 5 – 11 blades. The framesaw through-saws the whole log into unsquared boards simultaneously.
The circular logsaw, saws fast, but only one board at time.
Laser technology is used in many different types of processing units in a modern saw-mill.
Usually the saw-mill needs a big yard in order to keep the logistics in good order.
To be continued…
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Filed under: In English | Tags: cob building, DIY, drawing, eco, ecology, ideas, plans, vernacular architecture, woodworking, ympäristö
The following picture was submitted to us by an avid fan, who understands our rabbit minds very well.
Filed under: In English | Tags: 3D-modelling, cob building, DIY, drawing, ecology, Google, ideas, plans, vernacular architecture, woodworking
This is only the beginning. I will try to upload one picture per week mainly on the topics which we have covered and will be covering in our blog in the future. Things have been progressing at such a pace that we have to collect our marbles and put them into some reasonable order again.
Filed under: In English, strawbale building | Tags: alternative energy, eco, electronics, Finland, low technology, low-impact, strawbale building, sustainable development, vernacular architecture, woodworking
When having electrics in a straw bale home, one will need to know how to install it, as it might might be so that electricians will not necessarily have earlier experience with straw bale structures.
All of the wiring is to be hidden behind the plastered wall, or made to run in required places behind a special panel, so it is better to get it done right the first time. The panel solution also makes it easier to fix faulty wiring, if the need arises.
The wiring can also be placed to run in a tube which makes the installation easier.
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Filed under: In English, strawbale building, suomeksi | Tags: alternative energy, architecture, eco, energy saving, Finland, low technology, low-impact, strawbale building, sustainable development, woodworking
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Filed under: Chinese, In English, suomeksi | Tags: adventure, architecture, cob building, crafts, culture, DIY, eco, low technology, nature, woodworking
The video posted here is one of our sources of inspiration:
- created through ones own labor, a truly cost-effective and decent form of housing.
- learning through labor to create satisfactory solutions, even under very hard conditions.
This video is really worthwhile to see!
Clip: Dick Proenneke, building his house in arctic conditions, in Alaska.
Klippi: Dick Proenneke, rakentaa taloaan arktisissa olosuhteissa Alaskassa.
短影片: 低棵普揉呢可 (Dick Proenneke) ，在北极区条件中搞他的一坐木头房子。
Oheinen video on eräs inspiraatiomme lähde:
- omalla työllä luotu, erittäin edullinen ja asianmukainen asumus.
- oppiminen työn kautta luomaan tyydyttäviä ratkaisuja, kovissakin olosuhteissa.
Video on todellakin katsomisen arvoinen!
- 通过工作学习建成适当的解决方式, 包括在猛烈的气候情况中。
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Filed under: In English, strawbale building | Tags: alternative energy, architecture, eco, energy saving, Finland, low technology, low-impact, strawbale building, sustainable development, woodworking
A job well planned and prepared is a job half done. A quality plaster job starts before the plaster is brought to the site. The condition of the substrate, or the base surface to be worked with, is very important – as the plaster can only be as strong as the substrate it is attached to. Straw generally makes a great substrate for a plaster, as so does a mesh – if any mesh is to be used.
The transition points of bale to wood must also be detailed, because they have their own rate of expansion. Because these two materials expand and contract at a varying rate, many cracks will appear if the transition points are not properly detailed with a plaster lath.
One method is to cover all wood with roofing felt to isolate the wood from the plaster. One can also use a plaster lath to give the plaster something to hang on to. The plaster should always have some surface to hang onto, and hang on its own without any structural support. This is even more important around doors and windows as well as at the intersections with the ceiling.
On exterior surfaces, all wood needs to be covered as described above and any large gaps need to be filled.
Materials used for doing the filling are cob, light straw clay, burlap, spray foam (PU-foam) or other suitable materials.
When the plaster is to be applied, the walls should be tight and solid. All wooden parts should be covered and the mesh should be attached firmly to the wood structures and/or sewn through the straw bale walls.
All holes and gaps should be filled firmly so that no deflation occurs. It is also good to keep the site clean of straw and other debris, so one can walk safely around the structure.
The floors should also be covered so that dropped plaster will not have the possibility to mar it.
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