Strawbales Construction

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STRAWBALES CONSTRUCTION

PRESENTED BY:

BUNADRI USHA CHANDA SNEHA

160109732019 160109732302CHAITANYA BHARATI INSTITUTE OF TECHNOLOGY


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INTRODUCTION

.

Straw-bale building is a practical and perhaps

under utilized construction method.

Initiated in the United States at the turn of the

century, straw-bale building is showingnew merit in today's market place.

Walls of straw, easily constructed and

structurally sound, promise to take some of thepressure off of limited forest resources


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DEFINITION:

Straw bale construction uses baled straw from

wheat, oats, barley, rye, rice and others in

walls covered by earthen or lime stucco (some

use cement stucco, but we typically dont

suggest it). Straw bale are traditionally a waste

product which farmers do not till under the

soil, but do sell as animal bedding orlandscape supply due to their durable nature


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Why build with straw bale?

Ecologically friendly to build

Highly energy efficient

Affordable Hypoallergenic

Ideal for the do-it-yourselfer

Simply beautiful

Community oriented


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Why Bother?

Strengthen local

economies

Jobs in both

agriculture and

construction

Local self reliance

Protection from rising

energy prices

Energy independence

Climate change Indoor environmental

quality

Aesthetic beauty


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CONSTRUCTION

Two basic styles of straw bale construction

have been used.

Post and beam construction with straw bale

infill, and structural straw bale construction or

Nebraska style.


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Structural/Load Bearing, or Nebraska Style,

straw bale construction requires that the bales

sit for a short period of time to complete any

settling before stucco is added, or that the

walls be mechanically pre-compressed. If the bales are firm, there will be very little

settling .


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A wire tie-down system which is connected to

the foundation and the top plate

Eight to ten acres can supply sufficient straw tobuild a small house.

The best time to obtain straw is at harvest

time, May through June in central Texas.


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Bales may be anchored to each other by stakes of

wood for stability.

Mortar or clay between bales is also used.

Bamboo stakes on both sides of the bales, tied

with wire is used.


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http://en.wikipedia.org/wiki/File:Straw_bale_house03.jpg


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http://en.wikipedia.org/wiki/File:Straw-bale-construction-john-cross.jpg


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They are best used flat for structural purposes.

Plaster will also key into the ends of the

straw when bales are laid flat.

Bales come with two-wires or three-wires.

Two-wire bales weigh about 50 pounds andthree-wire bales, 75-100 pounds


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A timber frame

construction can use

bales as infill.

Windows and doorsare typically

accentuated towards

the interior or (less

preferable) exterior of

the opening creating a

deep well.


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Poultry netting can be mounted on both sides of

the walls for plastering. Stucco lath is used around windows, doors, and

corners for added strength.

A wood plate or concrete beam(or bond beam)

is placed on the top of the wall.

Trusses or roof framing can be set on this


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INTERIOR AND EXTERIOR

SURFACES
http://en.wikipedia.org/wiki/File:Matawa_Straw_Bale_Library_IMG_1443.JPGhttp://en.wikipedia.org/wiki/File:Wine_Country_Estate_-_SMS_Straw_Bale.JPG


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COST:

This can be one of the most economical wallsystems.

Houses have been constructed for as lowcost per square foot (floor area) for very basicaccomodations to high end homes at well over$100.00 per square foot


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ADVANTAGES

This type of construction is economical thancompared to the other materials.

There is no effect to the environment as it is a

natural material. As the appearance of a completed straw bale

structure is similar to a southwestern adobe

style building there is also public acceptence. By this method the burning of straws can be

reduced .


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METHODS OF BUILDING WITH STRAW

In-fill or non-structrual bale

Straw bale

Straw-clay building Mortar bale

Pressed straw panels


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Recently, great awareness is raised through

implementing the legislations of the environmental law

(2004), to avoid the use of mud in making red bricks

especially with the lack of muddy lands.

Alternatively cement and silty bricks are used in

constructing load bearing walls with a cost ranging

between 300-500 EGP/thousand bricks.

The bales will act as a cheap and sustainable materialwhich is more environmental friendly than the bricks in

order to produce low cost housing with local architectural

taste.

STRAW BALE LOAD BEARING WALLS

VERSUS CEMENT BRICKS WALLS


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CONCLUSION

In USA straw bale construction is used in high

temperature areas but INDIA being a tropical

country why cant we implement this method ?


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REFERENCES

^ ab Steen, Steen & Bainbridge (1994). The

Straw Bale House. Chelsey Green Publishing Co..

ISBN0-930031-71-7. ^ ab Magwood & Mark (2000). Straw Bale

Building. New Society Publishers. ISBN0-86571-

403-7.
http://en.wikipedia.org/wiki/Straw-bale_constructionhttp://en.wikipedia.org/wiki/Straw-bale_constructionhttp://en.wikipedia.org/wiki/International_Standard_Book_Numberhttp://en.wikipedia.org/wiki/Special:BookSources/0-930031-71-7http://en.wikipedia.org/wiki/Straw-bale_constructionhttp://en.wikipedia.org/wiki/Straw-bale_constructionhttp://en.wikipedia.org/wiki/International_Standard_Book_Numberhttp://en.wikipedia.org/wiki/Special:BookSources/0-86571-403-7http://en.wikipedia.org/wiki/Special:BookSources/0-86571-403-7http://en.wikipedia.org/wiki/Special:BookSources/0-86571-403-7http://en.wikipedia.org/wiki/Special:BookSources/0-86571-403-7http://en.wikipedia.org/wiki/Special:BookSources/0-86571-403-7http://en.wikipedia.org/wiki/Special:BookSources/0-86571-403-7http://en.wikipedia.org/wiki/Special:BookSources/0-86571-403-7http://en.wikipedia.org/wiki/Special:BookSources/0-86571-403-7http://en.wikipedia.org/wiki/Special:BookSources/0-86571-403-7http://en.wikipedia.org/wiki/International_Standard_Book_Numberhttp://en.wikipedia.org/wiki/Straw-bale_constructionhttp://en.wikipedia.org/wiki/Straw-bale_constructionhttp://en.wikipedia.org/wiki/Special:BookSources/0-930031-71-7http://en.wikipedia.org/wiki/Special:BookSources/0-930031-71-7http://en.wikipedia.org/wiki/Special:BookSources/0-930031-71-7http://en.wikipedia.org/wiki/Special:BookSources/0-930031-71-7http://en.wikipedia.org/wiki/Special:BookSources/0-930031-71-7http://en.wikipedia.org/wiki/Special:BookSources/0-930031-71-7http://en.wikipedia.org/wiki/Special:BookSources/0-930031-71-7http://en.wikipedia.org/wiki/International_Standard_Book_Numberhttp://en.wikipedia.org/wiki/Straw-bale_constructionhttp://en.wikipedia.org/wiki/Straw-bale_construction


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THANKYOU

Strawbales Construction

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