Dendrocalamus giganteus

Dendrocalamus giganteus Munro , Trans. Linn. Soc. London 26: 150 1868. (Syn: Bambusa gigantea Wall.; Bambusa gigantea Wall. ex Munro; Sinocalamus giganteus (Munro) Keng f.;Sinocalamus giganteus (Wall. ex Munro) A. Camus) ;
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India (West Bengal) to China (Yunnan): Assam, China South-Central, East Himalaya, India, Laos, Myanmar; Introduced into: Bangladesh, Cambodia, Comoros, Ecuador, Jawa, Lesser Sunda Is., Madagascar, Malaya, Mauritius, Nepal, Puerto Rico, Seychelles, Sri Lanka, Sumatera, Taiwan, Thailand, Trinidad-Tobago, Vietnam as per POWO;
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Dendrocalamus giganteus Wall. ex Munro for you.
Localty: Tuting (Indo-China border), Upper Siang district, Arunachal Pradesh (ca 700m)
Date: Nov. 2006.
Uses: A multipurpose bamboo for the local communities of Arunachal Pradesh. They are primarily used to make houses but the young shoots are also eaten with choice. Here you can see a couple (belonging to Adi tribe) preparing pickles from the young shoots. Other species are also used for the same purpose.
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Giant Bamboo Trees at Peradeniya, Sri Lanka:
Taken on the 17th of October, 2010 at the Royal Botanic Gardens, Peradeniya, Sri Lanka. The size can be judged by a couple sitting under it. They were really huge.Had to take the picture from a distance to cover the entire trees in the camera frame.

Is this Cathariostachys madagascariensis?

Bambusa oldhamii can also be a choice !

I think Dendrocalamus giganteus Wall ex Munro.

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Sending some more pictures that could help you with the id.
Actually I had just sent the first picture…didn’t think anyone would try to id.
That’s why had added only one picture.
Now some more specially for you!
Pictures taken same day, same place.
4 images.

Yes Dendrocalamus giganteus

Have seen this bamboo many times in Arunachal Pradesh. It is widely utilized in upper reaches of Siang districts. For making huts, water channels and to make pickles from the young shoots.

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Dendrocalamus giganteus FOR VALIDATION :: Dattaji Salvi Udyan :: 05 MAY 18 : 11 posts by 3 authors.
Dattaji Salvi Udyan  Thane
Date: May 5, 2018 … Altitude: about 11 m (36 feet) asl
Dendrocalamus giganteus  Munro

Please show one culm sheath.
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not sure whether this picture will help … else I will try to get better and closer pictures, the next time I visit the posted plant.
1 image.

I guess yes to Dendrocalamus giganteus !

Thanks very very much … for supporting the most possible ID.

Dendrocalamus giganteus

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References:
POWO