Cevahir Mall: Commercial Space Verification and Renovation Base

Project Summary

Before the comprehensive renovation planned at Cevahir Mall, one of Istanbul's busiest shopping centers, we documented the current state of 25,000 m² of retail and common areas. The work was carried out using laser scanning during night shifts, and a LOD 300 BIM model including MEP (visible installations) disciplines was created from the data.

Client Requirements

Mall management determined that existing project drawings had become outdated due to renovations over the years. For new leasing strategies and renovation project, they needed:

1. Accurate Square Footage: Precise measurement and verification of leasable areas (GLA).
2. Ceiling Coordination: Detection of installation routes above and below the suspended ceiling.
3. Fast Delivery: Data collection without disrupting mall operations.

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Operational Process

Due to the mall being open between 10:00 - 22:00, all site work was planned between 23:00 - 05:00.

Site Scanning Statistics

| Metric | Value | |--------|-------| | Total Area | ~25,000 m² | | Scanning Stations | 450+ | | Site Duration | 10 Nights | | Equipment Used | Leica RTC360 & BLK2GO (Mobile Scanner) |

• Static Scanning: For main corridors, atrium, and store fronts requiring detail.
• Mobile Scanning: For service corridors, fire stairs, and parking connections (speed-focused).

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Data Analysis and Area Calculations

Area calculations compliant with BOMA (Building Owners and Managers Association) standards were made on the BIM model and compared with existing lease contracts.

Area Deviation Table (Sample Block)

| Section | Current Contract (m²) | Laser Scanning (m²) | Difference | Explanation | |---------|----------------------|---------------------|------------|-------------| | Store A-102 | 150.00 | 148.50 | -1.50 | Column cladding difference | | Store B-205 | 85.00 | 92.40 | +7.40 | Storage area not included | | Common Area (Corridor) | 1200.00 | 1195.20 | -4.80 | - |

ROI (Return on Investment): As a result of precise measurements, a potential increase of 3.5% was identified in billable leasable areas. This difference enabled the project cost to be amortized within 2 months.

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Technical Modeling Details

The model is not just walls and floors; it contains critical components to form the base for renovation architects:

• Suspended Ceiling Grid: Exact processing of existing tile layout (critical for lighting placement).
• Fire Cabinets & Sprinklers: Location detection for preservation of existing lines.
• Floor Levels: Slopes and level differences in corridors modeled as "Toposurface" or "Sloped Floor".

Conclusion

Eos Proje delivered the reliable, up-to-date, and three-dimensional digital base needed by mall management and the renovation team within just 3 weeks. This project became the first step in the mall's digital transformation process.

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