Steel reinforcement bars ÔÇö commonly called rebar or BRC on Kenyan construction sites ÔÇö are the backbone of reinforced concrete structures. Choosing the wrong grade, or using sub-standard bars, can have catastrophic consequences for structural integrity.
The Two Main Grades
In Kenya, rebar is governed by the KS 02-104 standard. The two grades you will encounter are:
Grade R ÔÇö Mild Steel (Plain Round Bars)
- Smooth, round cross-section
- Yield strength: 250 MPa
- Used for: stirrups, links, column ties, distribution bars
- Common sizes: R6, R8, R10
Grade Y ÔÇö High Tensile (Deformed Bars)
- Ribbed/deformed surface for superior bond with concrete
- Yield strength: 460 MPa
- Used for: main longitudinal reinforcement in beams, columns, slabs, and foundations
- Common sizes: Y10, Y12, Y16, Y20, Y25, Y32
What the Numbers Mean
The number after R or Y indicates the bar diameter in millimetres. A Y12 bar has a 12mm diameter. A 12-metre Y12 bar weighs approximately 10.6kg. This matters when calculating tonnage for your project.
How to Verify Quality
Sub-standard rebar is a known problem in the Kenyan market. Here is how to protect yourself:
- Check for the KEBS Diamond Mark ÔÇö all compliant rebar should carry this on the rolling mill certificate and on the bar itself.
- Inspect the mill certificate ÔÇö request a mill test certificate from your supplier for every batch.
- Check bar weight ÔÇö underweight bars indicate reduced cross-section and therefore reduced strength.
- Use a reputable supplier ÔÇö buy from established suppliers like Baran Company Limited who source directly from certified rolling mills.
Stock at Baran Company
We stock the full range of KEBS-certified rebar from Steel & Tube Kenya and other certified mills ÔÇö R8 through Y25. Wholesale pricing is available for orders above 5 tonnes, with site delivery across Nairobi.
