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===Background===
===Background===
The frame for the shed has all ready been built by previous [[CCAT]] workers.  The wood frame is set up in a rectangular form with a sloping roof (for possible later [[http://en.wikipedia.org/wiki/Rainwater_harvesting water catchment]] system). The majority of the weight of the roof and possible later water catchment will be held by the frame thus the walls do not have to be extremely weight bearing except in consideration of shelves for tools.   
The frame for the shed has already been built by previous [[CCAT]] workers.  The wood frame is set up in a rectangular form with a sloping roof (for possible later [[http://en.wikipedia.org/wiki/Rainwater_harvesting water catchment]] system). The majority of the weight of the roof and possible later water catchment will be held by the frame thus the walls do not have to be extremely weight bearing except in consideration of shelves for tools.   


The frequently wet, cold, and humid nature of our climate is an opportunity to work with breathable and non-watersoluble materials. Some methods using organic matter present the issue of rotting. The tendency of organic matter to rot in our wet climate will require the walls to "breathe" well so as to not trap moisture inside.
The frequently wet, cold, and humid nature of our climate is an opportunity to work with breathable and non-watersoluble materials. Some methods using organic matter present the issue of rotting. The tendency of organic matter to rot in our wet climate will require the walls to "breathe" well so as to not trap moisture inside.

Revision as of 01:35, 12 February 2010

Template:ENGR 305 inprogress. Please do not change unless you are a member of the project team. Work in Progress


ABSTRACT

CCAT is building a functional and educational tool shed that demonstrates three different green building materials, with 3 design differences per wall. Each wall will be designed out of different earth/green materials and overtime will tell us which materials held up the longest and were the most suitable to our local Arcata environment. This is one in a series of three pages on the construction of the CCAT greenshed. Our group will focus on the west wall, the other two groups will focus on the south wall and north wall. To utilize the small time of sunlight hitting the west wall we'll design it with thermal mass in mind. An existing example of natural wall construction exists at CCAT [[1]] The example is made 1/2 of papercrete and the other 1/2 of straw and clay-slip. It may yet be used for inspiration on the north and west walls needing insulation.


Introduction

Fig 1: wood frame only

Background

The frame for the shed has already been built by previous CCAT workers. The wood frame is set up in a rectangular form with a sloping roof (for possible later [water catchment] system). The majority of the weight of the roof and possible later water catchment will be held by the frame thus the walls do not have to be extremely weight bearing except in consideration of shelves for tools.

The frequently wet, cold, and humid nature of our climate is an opportunity to work with breathable and non-watersoluble materials. Some methods using organic matter present the issue of rotting. The tendency of organic matter to rot in our wet climate will require the walls to "breathe" well so as to not trap moisture inside.

The west wall does not have the problem with the concrete foundation as the south wall does. On the south side the green shed was poured to make a standard 6 inch wide wall. This is not wide enough for most earth building methods to be of much insulation value. The foundation for the south wall will have to be widened to accommodate the south wall.

Project Requirements

Criteria

  • Durability (How long are the materials specified to last?)
  • Construction Time (What climate and material conditions limit time?)
  • Complexity (Can construction be completed by the layperson?)
  • Cost (How much will you spend?)
  • Locality of Materials (How far will you go to find materials?)

Ranking Criteria: The wall completion is part of a class in ENGR 305, thus construction time is very important. The locality of materials and the cost is also a very important part of the project, since we want it to be a repeatable model for those without many resources.

Design

Describe your design here.

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Costs

header 1 header 2 header 3
row 1, cell 1 row 1, cell 2 row 1, cell 3
row 2, cell 1 row 2, cell 2 row 2, cell 3

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Discussion

Your discussion.

Next Steps

The next steps.

Conclusions

Your conclusions.

Contact details

[Carrie Schaden], [Phoebe Sager], [Juliana Willsen]

References Annotated

  • Wojciechowska, Paulina, "Building with Earth: A guide to flexible-form Earthbag Construction" [2]

She introduces a variety of natural building materials including adobe,cobb,rammed earth, wattle and daub, and Earthbags. She goes into detail about how and why to use earthbags and introduces leaders in the field of earthbag construction. She also discusses the how and why of different architectural designs like arches and domes that are useful for any earth material construction.

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