A structural engineer's perspective on when to choose reinforced concrete, steel, or hybrid systems for different building types.
The choice between concrete and steel framing is one of the most consequential decisions in building design. It affects cost, construction speed, flexibility, and long-term maintenance. Here's how we approach this decision at Kago Designs.
Reinforced Concrete: The Workhorse
Concrete remains the default choice for most Kenyan construction, and for good reason. It's locally available, fire-resistant, and provides excellent thermal mass. For buildings up to 15 stories, concrete is typically the most cost-effective option.
Steel: Speed and Flexibility
Steel framing shines when speed is critical or when future modifications are anticipated. A steel structure can be erected in half the time of an equivalent concrete frame. It's also ideal for long-span structures like warehouses and exhibition halls.
Hybrid Systems: Best of Both
Many of our most successful projects use hybrid systems — concrete cores for stability and fire protection, with steel framing for speed and flexibility. The Kilimani Corporate Plaza is a prime example, using a concrete shear wall core with steel moment frames.