Modular MEP Support System – Sobha Hartland
Project Overview: As part of the Sobha Hartland development, Hira Walraven implemented a modular MEP support solution designed for corr...
Prepared by: Zaid Kharoufeh
Position: Technical Manager
Company: Hira Walraven
Document Type: After-Sales Service Case Study for Contractor
Project Overview: As part of our ongoing commitment to innovation and support, Hira Walraven successfully implemented the Yeti rooftop equipment support system at the Amazon Fulfillment Center. This initiative replaced traditional concrete plinths with a lightweight, modular, and sustainable solution, optimizing installation time, safety, and environmental impact.
The following mechanical units were installed on the rooftop:
| Description | Qty | Unit Weight (kg) | Total Weight (kg) |
|---|---|---|---|
| Roof Mounted Exhaust Fan | 14 | 3300 | 46200 |
| FAHU – HS-01-Evaporative unit | 1 | 1928 | 1928 |
| CRAC unit (Outdoor unit) | 11 | 228 | 2508 |
| FAHU – 1.1 – 01 to 02 Evaporative units | 2 | 773 | 1546 |
| FAHU – 1.1 – 03 to 04 Evaporative units | 2 | 419 | 838 |
| ACC-HS and 1.1 Condensing units (x3) | 3 | 299 | 897 |
| VRF Outdoor Units (x9) | 9 | 299 | 2628 |
| VRF Outdoor Units (x3) | 3 | 244 | 732 |
| AHU-CCB Outdoor Units (x4) | 4 | 201 | 804 |
| Small VRF Outdoor Units (x4) | 4 | 100-120 | 420 |
| IN ROW OUTDOOR UNIT (x9) | 9 | 120 | 1080 |
Total Rooftop Equipment Weight: ~59,748 kg
2. Avoided Concrete Weight and CO2 Savings
Traditional installations would require concrete plinths of 1.5–2 times the equipment weight:
| Factor | Min Estimate (1.5x) | Max Estimate (2.0x) |
| Concrete Weight | 89,622 kg | 119,496 kg |
| CO2 Emissions | 10.75 tons | 14.34 tons |
Yeti Weight Reduction Advantage
By replacing concrete with the Yeti system supported by steel frames, the rooftop structural weight was significantly reduced:
| System Type | Estimated Weight (kg) |
|---|---|
| Traditional Concrete | 119496 |
| Yeti with Steel Frames | 40000 |
| Weight Saved | 79496 |
Percentage Reduction: > ~66% reduction in rooftop support system weight
This significantly lowers roof loading, extends building service life, and reduces structural reinforcement needs.
3. Labor and Time Savings
Estimated labor saved by avoiding concrete work:
| Task | Man-Hours Saved |
|---|---|
| Shuttering/Formwork | 100-150 |
| Rebar Cutting & Fixing | 80-100 |
| Concrete Pouring | 150-200 |
| Finishing & Adjustments | 40-60 |
| Task | Man-Hours Saved |
| Total | 370-510 hrs |
Additional benefits: – No curing delay: 7–14 days saved on project schedule – Minimal heavy lifting equipment – Reduced site risk and improved safety