KGN

Introduction to Post-
tensioned raft foundations

Post-tensioned raft foundations are reinforced concrete slabs
designed to evenly distribute building loads across the soil,
ensuring stability and strength. Integrated post-tensioning cables
enhance load-bearing capacity, minimize cracking, and reduce
slab thickness, making the foundation more efficient and cost-
effective. Its durability and material efficiency make it an ideal
solution for high-rise buildings, industrial structures, and large-
scale construction projects.

Key Characteristics of Post-
Tensioning Raft Foundations:

Superior Load Distribution:

Spreads structural loads evenly across a large area.

Crack Control & Durability:

Reduces settlement and prevents shrinkage cracks.

Cost-Effective & Efficient:

Uses less concrete and reinforcement while maintaining strength.

Design & Engineering of
Post-Tensioned Raft Foundations

The construction of a post-tensioned raft foundation follows a structured process to ensure strength and
durability. It begins with site preparation, where the foundation area is excavated and leveled. Steel
reinforcement and post-tensioning tendons are then arranged within the slab before concrete is poured.
The final step involves grouting the ducts to protect the tendons and ensure long-term performance.

Excavation and Leveling of Foundation Area for a Stable Base

Placement of Steel Reinforcement and Post-Tensioning Tendons

Pouring and Curing of Concrete to Form the Raft Slab

Applying Tension to Tendons Using Hydraulic Jacks

Grouting of Ducts to Protect Tendons and Ensure Durability

Design & Engineering of
Post-Tensioned Raft Foundations

Excavation and Leveling of Foundation Area for a Stable Base

Placement of Steel Reinforcement and Post-Tensioning Tendons

Pouring and Curing of Concrete to Form the Raft Slab

Applying Tension to Tendons Using Hydraulic Jacks

Grouting of Ducts to Protect Tendons and Ensure Durability

Advantages of Post-
Tensioned Raft
Foundation

A post-tensioned raft foundation offers a strong,
efficient, and cost-effective solution for supporting large
structures. By distributing loads evenly across the soil, it
minimizes differential settlement and enhances structural
stability. This makes them ideal for high-rise buildings,
industrial facilities, and large commercial structures.

Applications of
Post-Tensioned Raft Foundation

Industrial &
Manufacturing Facilities

Warehouses &
Distribution Centers

High-Rise Buildings &
Commercial Structures

Educational Institutions &
Campuses

Hospitals &
Medical Centers

Applications of Prestress
Rock Anchors

Industrial &
Manufacturing Facilities

Warehouses & Distribution Centers

High-Rise Buildings &
Commercial Structures