Contractor: Obayashi Singapore
Precaster: Eastern Pretech
Product Supplied: MOMENT Hybrid Precast Connection
Project Description
Located in Singapore, the 60+ megawatt data center is set on 1.5 hectares, close to the Changi North Cable Landing Station for strong international interconnection. With over 20,000 square meters of data hall area, the scalable campus is designed for hyper-scale customers, supporting their rapid growth in Singapore and throughout South East Asia.
Designed to meet the stringent security requirements of global technology customers, this project is Singapore’s largest and most efficient independent data center, another pioneering independent hyper-scale data center in the Asia Pacific. It is a connected, secure, and efficient home for the cloud in Asia. This facility ensures the highest operational standards to provide customers confidence in terms of reliability and security.
The Solution
Challenge 1: Installation of the precast column using the full Precast Shoe solution for the initial phase was costly.
During the construction of the initial phase, the precast columns were installed using the full Precast Shoe solution which was costly to the client. Hence, the MOMENT Hybrid Precast Connection was introduced for the construction of Phase 2, where MOMENT Precast Shoes were used together with MOMENT Half Grout Couplers, offering substantial cost savings (up to 50%) when compared to a full Precast Shoe solution.
Challenge 2: The design of the precast column (a combination of precast column and crosshead) was too heavy to be lifted by a crane
The design of the precast columns consists of a combination of precast columns together with a crosshead. However, this design faced a challenge whereby the precast column was too heavy to be lifted by a crane. Hence, both precast elements were separated into two elements; the precast column and the precast crosshead. The MOMENT Hybrid Precast Connection was secured at the bottom of the precast crosshead and connected to the rebar protruding from the top of the precast column. With this, the load is divided but the connection remains strong to carry the load of the beam later.
Challenge 3: 1-year time frame to complete the project
The construction of this data center is aimed to be completed within a year, which is a stringent time frame for our client. However, with MOMENT Hybrid Precast Connection installed to the precast crosshead, the precast section can be lifted, placed, leveled and secured in less than 30 minutes. Once the Precast Shoes are installed, it is immediately loadbearing. Work can continue on the next precast element and later more than one assembly can be grouted, reducing both worker and crane time.
In addition, the MOMENT Grout Couplers cast in the precast column are grouted using the mass grouting method which is faster (compared to the individual grouting method) where the grout flows steadily from top to fill the Grout Coupler from bottom up to achieve robustness in a short period of time.
The Result
Approximate 500 precast columns have been installed using our MOMENT Hybrid Precast Connections. This shows that the combination of MOMENT Precast Shoe and MOMENT Grout Coupler offers many advantages over other building techniques, including substantial savings in cost and time, and improvements in site safety. Furthermore, we are able to provide a cost-saving solution that delivers the same robustness to the construction.
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