Being in an earthquake zone, Philippine law requires stringent structural requirements. Hence, reinforced concrete is widely used in construction projects. Reinforced concrete is concrete embedded with deformed steel bars, also called reinforcing steel bars or rebars for short. Rebars and concrete are the first and most critical components of a structure. Rebars are manufactured in standard sizes and lengths with different strengths. The industry uses theoretical standards coupled with certain physical restrictions. More detailed explanation can be found under the Buyer’s Guide.
2. What does the law say? Building code
- In an earthquake zone such as the Philippines, utmost safety must be the top priority. Any shortcuts, be it in the design or the proper materials used, may mean loss of life.
3. Rebar description and diagram
- Rebars can be thought of as round bars with lugs or deformations, hence the term deformed bars. Below are diagrams and terminology concerning the standardized and commercially-approved rebars.
4. BPS certification
- All rebar manufacturers must be approved by the Bureau of Product Standards (BPS) and undergo annual certification by BPS. Subsequently, legible corporate logos must be engraved onto the rebars, as well as the size (nominal cross-sectional diameter) and grade.
5. Standards – physical, mechanical, and chemical
- PNS 49:2002 specifies the standard properties that rebars must conform to for the construction of reinforced concrete. Link to standard…
6. Things to look out for when buying
- Reputation of supplier
- Quality processes
- Delivery terms
7. Non-standard rebars
- Since steel is one of the most expensive yet important materials in a structure, naturally, smaller producers may supply non-standard rebars. For most “home-made” or simple structures, these are not significant or life-threatening. But when housing or office spaces are involved, the importance of high quality rebars becomes exponentially greater.
- Non-standard rebars may include smaller in size, lighter in weight, physical defects, and the like.
8. Mill Test Certificates
- Each delivery includes Mill certificates that show our mechanical test results corresponding to the actual source or raw material.
- As a quality-focused company, we DO NOT give production “batch” test results that encompass multiple (or different) raw materials and lump them into a single “heat”. This way, we can trace the specific raw material used for corresponding steel bars.
9. 3rd party testing of rebars
- The buyer is entitled to test the delivered rebars for verification. Most buyers go through third party centers like MIRDC and Philippine Geoanalytics which are two of the more reliable testing centers.
- When the first testing results is a failure, Filipino Metals is entitled to a retest before a rejection is accepted/acknowledged. When this third party test results in failure, then the bars will be replaced by Filipino Metals.