Is Gigantochloa atter Stronger than Gigantochloa apus?

Is Gigantochloa atter Stronger than Gigantochloa apus?

Is there a difference in the level of sturdiness or hardness between Gigantochloa atter and Gigantochloa apus?

I am currently doing a project and need to decide on the specific bamboo species to be used. The project is investigating on which type of bamboo is a strong and sturdy bamboo that can withstand impacts during vehicle crashes.

I searched on the web and found that Gigantochloa atter and Gigantochloa apus are two commonly used bamboo species for construction purposes as they are strong. Is it possible to determine which of them is stronger than the other?

 

Stephane from Guadua Bamboo replied:

I did some quick research online and found the following data in regards to the physical and mechanical properties of Gigantochloa apus and Gigantochloa atter:

The strength properties of Gigantiochloa atter were tested in green (Moisture content 72.3%) and in air dry (M.C 14.4%) condition.

  • Average MOR varied from 87.9 to 108.1 N/mm2 from base to top in green and 117.7 to 127.7 N/mm2 in air dry.
  • Compression strength parellel to grain 24.77 to 27.97 N/mm2 in green, 32.87 to 30.98 N/mm2 in air dry.
  • Average tensile strength was 299.8 to 273.0 N/mm2 from base to top in green and 33.15 to 24.70 N/mm2 in air dry.
  • Average shear strength was 5.8 to 10.8 N/mm2 in green and 9.5 to 10.8 N/mm2 in air dry.

The strength properties of Gigantochloa apus were tested in green (Moisture content 54.3%) and in air dry (M.C 15.1%) condition.

  • Average MOR 102.0 in green and 87.5 N/mm2 in air dry, maximum crushing stress varies from 21.73 to 26.50 in green and 27.29 to 48.64 kN/mm2 in air dry.
  • Average tensile strength was 294.1 in green and 298.9 kN/mm2 in air dry.
  • Average shear strength in green varied from 5.99 to 7.68 whereas in air dry it was 7.47 to 7.65 kN/mm2.

 

Elizabeth replied:

I'm sure this information will add value to my project! Thank you very much!

 

Abhay replied:

Sorry, but with the conversions I had difficulty understanding which was stronger (in terms of its tensile strength)? I'm currently trying to build a hoop greenhouse using bamboo poles and would very much like any advice on the type of bamboo I should use. Thanks for any info you can pass along.

Additional Info: The poles need to be approximately 20 ft in length, a maximum of 2 inch in diameter at the base and a minimum of 3/4 inch diameter at the tip.

 

Stephane from Guadua Bamboo replied:

Gigantochloa atter and G. apus have diameters of around 3.5", I think in your case, you would be better off with Phyllostachys aurea.