Construction grade bamboo poles are processed and tested according to the following international standards to ensure they meet the requirements for load-bearing use in structural applications.

• PNS ISO 19624: Guidelines for Grading Bamboo
  Defined by ISO 19624:2018, grading is the process of sorting bamboo based on specific criteria to ensure structural integrity and consistent performance. This international standard, adopted in the Philippines in 2020, provides a framework for developing grading procedures tailored to different bamboo species.

• PNS ISO 22157 – Bamboo Structural Testing 

In 2020, Philippines adopted PNS ISO 22157:2020, titled "Bamboo Structures – Determination of Physical and Mechanical Properties of Bamboo Culms – Test Methods." This standard specifies test procedures for evaluating the physical and mechanical properties of round bamboo culms, including assessments of moisture content, density, and various strength properties such as compression, tension, and bending.

• PNS ISO 22156 – Structural Use of Bamboo

"Bamboo Structures — Bamboo Culms — Structural Design," is adopted as a Philippine National Standard (PNS). This standard specifies the design methodologies, applications, and durability of bamboo structures.

Bamboo Grading Criteria

1. Classification and Grading
   Bamboo culms are graded based on key performance indicators such as strength, stiffness, and durability. The grading process includes:

• Visual inspection for surface quality and defects

• Mechanical testing to assess structural strength

• Dimensional consistency to ensure uniform size and shape

2. Defects and Quality Control
   To ensure high-quality bamboo, culms must meet the following standards:

• Free from major defects such as deep cracks, large knots, fungal decay, and insect damage

• Straightness of the culm is required for structural applications

• Age of harvest must be between 3 to 5 years to ensure proper maturity and strength

• Structural integrity must be intact, with no visible signs of internal weakness

3. Moisture Content and Preservation Treatment

• • Bamboo must have a controlled moisture content to avoid warping, shrinkage, or expansion during use

  • Preservative treatments are required to improve resistance to pests, fungi, and decay

4. Structural Performance Testing
   Bamboo intended for construction must pass the following strength tests:

• Bending strength

• Compressive strength

• Tensile strength

• Shear strength

By aligning with these standards, we help pave the way for bamboo to become a mainstream, code-compliant material for sustainable building in the Philippines.