Strengthening an Existing Commercial Structure for Over 1,000,000 lbs of New Load

Introduction

Structural retrofit work requires more than installation. It requires planning, sequencing, field coordination, and a strong understanding of how new strengthening systems interact with existing structures.

In this project, RapidCrete was involved in the structural retrofit of an existing commercial concrete building in Surrey, BC. The building was being adapted for a new function that required the upper floor to carry over 1,000,000 lbs of load.

The project later received the CISC-ICCA BC Region 2026 Sustainability Award for structural steel retrofit and adaptive reuse, recognizing the sustainable approach of extending the functional life of an existing 50-year-old building.

This project was a successful collaboration between RapidCrete, BMP Engineering, and Solico Metal.

Project Overview

Project Type: Commercial structural retrofit
Location: Surrey, BC
Structure Type: Existing concrete building
Purpose: Strengthening for new use and increased load capacity
Recognition: CISC-ICCA BC Region 2026 Sustainability Award

RapidCrete’s scope included the complete installation of the structural steel strengthening system and the related concrete modification work required to execute the structural engineer’s design.

The work involved:

  • Communication of as-built conditions with the steel supplier
  • Receiving and installing steel components
  • Installation of beams, joists, columns, rods, and strengthening elements
  • Modification of existing concrete walls
  • GPR scanning of existing concrete columns and slabs
  • Drilling, coring, and cutting
  • Adhesive reinforcement installation
  • Grouting under base plates
  • Field execution according to the structural requirements

This combination of structural steel installation, concrete modification, scanning, drilling, coring, and grouting was completed by RapidCrete’s in-house personnel.

The Challenge

This project had several major challenges:

  • The existing building had to be strengthened for a major increase in load demand
  • The work had to be performed inside an existing structure with tight access conditions
  • Steel components had to be installed in a specific sequence
  • Low ceiling heights and limited space created installation constraints
  • Existing reinforcement had to be located and protected during drilling and coring
  • Large steel components had to be received, stored, moved, and installed with limited staging space
  • Coordination between the contractor, structural engineer, and steel supplier was critical

The installation required detailed planning before execution because each component had to fit into a constrained space and connect properly to the existing concrete structure.

Why This Was Complex

Tight Tolerances and Low Clearance

The work was performed in a low-height parking area with limited room to maneuver. Installing beams, joists, columns, rods, and other strengthening components in this environment required careful sequencing and field coordination.

Some components could not simply be lifted and installed in a conventional way. RapidCrete had to temporarily suspend certain pieces using scaffold as a field installation method. This allowed the team to position components, fit them together, and then tie them into the concrete structure.

Existing Reinforcement and Concrete Modification

Because the structure was already built, RapidCrete had to work around existing reinforcement in columns, slabs, and walls.

GPR scanning was used to locate existing reinforcement and reduce the risk of damaging critical structural elements during drilling, coring, and cutting.

This allowed the team to complete concrete modifications while respecting the existing structure and the structural engineer’s requirements.

Limited Storage and Just-in-Time Delivery

Another major limitation was the lack of space to receive and store large steel components on site.

To manage this, RapidCrete coordinated closely with the steel supplier to phase deliveries and align them with the installation sequence. This just-in-time delivery approach reduced site congestion and helped keep the work moving efficiently.

RapidCrete’s Approach

RapidCrete approached this project as a coordinated retrofit installation, not just a steel installation scope.

The approach included:

  • Reviewing site conditions and access limitations
  • Coordinating as-built information with the steel supplier
  • Planning installation sequence before receiving components
  • Using GPR scanning to locate reinforcement before drilling and coring
  • Completing concrete cutting and modifications
  • Installing adhesive reinforcement where required
  • Installing structural steel strengthening components
  • Grouting under base plates
  • Coordinating field execution with the project team

The success of the project came from combining technical understanding with practical field experience.

Execution

The project followed a controlled and carefully planned sequence:

  1. Review of existing conditions and structural requirements
  2. Communication of as-built conditions with the steel supplier
  3. Planning of installation sequence and delivery timing
  4. GPR scanning to locate existing reinforcement
  5. Drilling, coring, and concrete modification
  6. Installation of adhesive reinforcement
  7. Receiving and staging steel components based on sequence
  8. Temporary support and suspension of selected components using scaffold
  9. Installation of beams, joists, columns, rods, and strengthening elements
  10. Grouting under base plates
  11. Final coordination and completion according to the structural design

The project was completed one week ahead of the proposed schedule.

Results and Impact

The project was completed successfully and ahead of schedule.

Key results included:

  • Existing structure strengthened for a new high-load use
  • Over 1,000,000 lbs of load demand addressed through retrofit work
  • Steel strengthening components installed in tight and low-clearance conditions
  • Existing reinforcement located and protected through GPR scanning
  • Concrete modifications, drilling, coring, installation, and grouting completed in-house
  • Just-in-time delivery and sequencing successfully managed
  • Project completed one week ahead of the proposed schedule

The project later received the CISC-ICCA BC Region 2026 Sustainability Award for structural steel retrofit and adaptive reuse.

RapidCrete also received recognition from BMP Engineering, as the structural engineer, and Solico Metal, as the steel fabricator, detailer, and general contractor, for its contribution to the successful execution of this complex structural strengthening project.

Key Takeaways

1. Structural Retrofit Requires More Than Installation

Working inside an existing structure requires understanding of the existing concrete, reinforcement, tolerances, access conditions, and the structural engineer’s intent.

2. In-House Capability Improves Control

RapidCrete’s ability to provide scanning, cutting, coring, drilling, adhesive reinforcement, steel installation, and grouting with in-house personnel helped reduce coordination risk and improve execution control.

3. Planning and Sequencing Can Make or Break the Project

In tight spaces with limited storage, the order of delivery and installation matters. Detailed planning allowed the team to manage the work efficiently and complete the project ahead of schedule.

4. Collaboration Strengthens Execution

Successful structural retrofit work depends on strong coordination between engineering, fabrication, field planning, and installation. In this project, that coordination was one of the key factors behind the successful outcome.

5. Adaptive Reuse Is a Sustainable Construction Strategy

Strengthening an existing building can extend its service life, improve performance, and support new functions without requiring full replacement of the structure.

Closing

This project highlights the value of combining technical knowledge with hands-on field experience.

RapidCrete continues to support structural retrofit and concrete modification projects where planning, precision, and execution control are critical to success.