To hang M&E system, Contractors define right positions to drill and access drop-in. Drilling ceiling touches prestressing steel strand in concrete. This causes many dangers in executing and the quality of building. So, Japanese contractors use PT Insert to replace the traditional method.
Plastic components of PT Insert are designed with various colors helping contractors classify and differentiate work items by colors and manage more effectively. PT has 3 components: PT body with one threaded head which has been used to connect with thread rod, another head is used to connect with plastic nut which used to connect with formwork by nail or screw bolt.
Step 1: Specify the PT position and fix it through plastic nut by nail or screw bolt on formwork
Step 2: Connect PT with plastic nut through the body or plastic position nut
Step 3: Pouring concrete and waiting for completely cure
Step 4: Remove formwork and plastic position nut out. After that, connecting with thread rod to hang M&E system
Comparing to traditional method, PT shows many outstanding advantages such as: avoid touching prestressing steel strand, safer for worker, cut off labor and money.