Project Overview
BKBM provided structural and restoration engineering services for extensive repairs to an existing 289’ x 224’ post-tensioned concrete parking ramp in Minnetonka, MN. The project aimed to restore structural integrity, user safety, and long-term durability of a heavily utilized parking structure.
Project Highlights
- Comprehensive Condition Assessment:
- Initial surveys detected spalled and delaminated concrete on both the top and bottom sides of the ramp slab, as well as delaminated column bases.
- Destructive testing identified a limited number of failed post-tensioned tendons, informing the preliminary project scope.
- Expanded Repair Scope:
- The original estimate called for approximately 1,000 square feet of slab repair and 10 post-tensioned tendon repairs.
- During demolition, significantly more deterioration was discovered, leading to the complete closure of the ramp for expanded repairs.
- Final repairs included approximately 3,000 square feet of slab restoration and replacement or repair of 180 post-tensioned tendons.
- Structural Restoration Solutions:
- Repaired all spalled and delaminated concrete for both slab surfaces and column bases.
- Replaced or restored all corroded and broken post-tensioned tendons to restore full load-carrying capacity, improve long-term performance, and mitigate future deterioration.
Engineering Solutions
BKBM’s restoration engineering team developed a responsive, phased repair strategy to address both known and unforeseen structural issues. The approach prioritized user safety, structural durability, and efficient ramp reopening, adapting to discovery of additional damage during construction.
Results & Impact
The Comcast Parking Ramp restoration resulted in a fully rehabilitated parking structure with renewed structural performance and enhanced safety for all users. BKBM’s expertise in post-tensioned concrete repairs ensured a robust, long-lasting solution despite significant escalation in repair scope.
1967
15,000+
23
Minneapolis & Denver