modified type of nyishi typology , bamboo housing in arunachal pradesh

8/22/2019 modified type of nyishi typology , bamboo housing in arunachal pradesh.

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CONSTRUCTION OF

MODIFIED INDIGENOUSNYISHI TYPOLOGY

BY TANA SUMPI







Arunachal Pradesh is situated in the North Eastern part of

India with 83743 sq.kms area between latitude 26 30’ N

and 29 30’ N and longitude 91 30’ E and 97 30’ E. The statehas a long international border with Bhutan to the west

(160km), China to the North and north-east (1080km) and

Myanmar to the east (440km). In terms of area, it is the

largest state in the North Eastern Region.

Arunachal Pradesh was a Union Territory and attainedstatehood on

20th February 1987 and although this new state became

the largest state area –wise in the North- East region ,even

larger than Assam , yet the population of Arunachal

Pradesh is the smallest with only 10,96,702 according tothe 2001 census. This population is apparently drawn into

the urban areas as there is evidence of a high level of

urbanization.



THE NYISHI TRIBE OF ARUNACHAL

PRADESH



PURPOSE???

• To bring forth the idea of constructionof houses in the north eastern regionusing bamboo.

• Bamboo is the most economical andeasily available material for construction in the north easternregions.

• Bamboo is the most ECO FRIENDLYmaterial and it is the need of the hour.



BAMBOO tree- bambusa

pulgaris



STRUCTURAL PROPERTIES OF BAMBOOFIBRES RUN PARALLEL TO THE AXIS

OF THE CULM (stem)

NOT CONTINUOUS ALONG THE

LENGTH, THEY BEND TOWARDS THE

INSIDE OF THE NODES

NO RADIAL FIBRES EXIST

THE MORE THE FIBRES , GETS MORE

DIFFICULT TO FRACTURE THE

MATERIAL



BAMBOO POSSESS HIGH

ELASTICITY

BAMBOO ELASTICITY IS1.5 to 2.0 x 105 kg / cm2

The specific gravity is 0.575The average weight is 0.625 Kg/m

The reinforcement nodes

(diaphragms) prevent the

emerging longitudinalcracks from spreading over

the entire tube length.



TRADITIONAL BAMBOO

HOUSE



• The indigenous houseis constructed with

Wooden & Bamboousing (Thatch,Chinese Palm leaves,Cane leaves and

Jungle Banana Leaves)as roofing materialswhichever is locallyavailable.

• The entire Joint arebind with cane ropes





Parts of a local Nyishi house

• THE KITHCEN CUM FIREPLACE “emmi”

• The base is constructedwith four bamboo

support and on thesurface of the room 4

1 foot wooden blocks ona banana leaf and thensoil is applied upto the

height of the blocks,thusthe stove can be laid forkitchen purpose.



THE ROOF MADE WITH BAMBOO

TRUSS, TOKO LEAF AND CGI SHEET



The FRONT verandah The REAR verandah



DRAWBACK… The longitivity of this type of house is10 to 12 Years by replacing roofingmaterials after every 3 to 5 years.

The wooden foundation used gets rut due tobacterial action and there is danger of structure collapsing.

During very heavy rainfall the roof starts leaking

because of which the local people havesorted out the modified type of houseconstruction.



THE MODIFIED TYPOLOGY



BAMBOO WALLING



• The improved

indigenous Nyishi

house have similar

plan but construction

materials are changed

in some parts that isthe pillars portion is

replaced with RCC Post

with RCC footing ANDroofing with CGI sheet



• The roofingmaterials arebamboo chims andCGI Sheets in place

of Thatch, ChinesePalm leaves, Caneleaves and JungleBanana Leaves.

•The longitivity of the improved typeof indigenous NyishiHouse is about 20

to 25 Years.



• The modified typology

is more earthquake

resistant due to the

composite materialused i.e combination

of concrete and rcc

with the commonlyavailable bamboo.



AN AUTOCAD PLAN OF THE NYISHI HOUSE





• The Houses floor level is

raised 2.50 Mtr from the

ground level and ceilinglevel is 2.50 Mtr from the

floor level.

• The plan consists of rear

verandah, Common room

with fire place, bed room,

Guest room, Front Verandah

& side verandah.

COMPARISON



COMPARISONS.No ITEM Cement Concrete house Bamboo based house

1 Cost /sq.ft Rs.800-1000 Rs.450-550

2 Life span 75 years 15years

3 Annual maintenance All most negligible Bi annual insect maintenancemust

4 Time for construction Min. six months Min. two to four weeks.

5 Skill labour availability more Less

6 Quality control Testing labs available every

where.

Yet to be developed.

7 Quality of building materialavailability

plenty Quality bamboo availabilitylimited

8 Other building components available Very few sources for roof,

door, and floor bamboo

based products.

9 Pre cast building

components

available Yet to develop

10 Scope for application Every where Suitable for earth quake

resisting structures

11 Suitability Every where Quality bamboo producing

areas like N-E.

12 Need for further

development

Already well developed and

lot of research going on.

Need for more research.



ADVANTAGE..

• The Nyishi typology is veryflexible and light structurethus resistant to earthquakebecause of its light weight

construction. Also If damagedin case of devastatingearthquake rector scale therewill be less casualty or zero

casualty because it will notcollapse like rigidly built brickwalling and heavy and rigidbuilding.



CONCLUSION

Development of Bamboo houses depends on

• availability of graded & standardised raw material and eco friendly preservatives and preservative

facilities;• Access to design information like standards & codes,

design procedures to engineers/ Architects;

• trained man power

• Participation of NGO’s and Government inencouraging wider use of bamboo building;

• standard designs and Do-it-yourself kits.



Notice that the stiffesttree is most easily

cracked during strongwinds but the bamboo

survives by bending

with the wind

THANK YOU

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modified type of nyishi typology , bamboo housing in arunachal pradesh