T-Grid Suspension SystemsWall-AngleIt is a Pre-Painted Galvanized Iron (PPGI) 90-degree angle used in the framework. Cross-TeeShort metal T-beam used in suspended-ceiling systems to bridge the spaces between the main tees Main-TeeMain tee is a typically 3.6m length of ‘T’ shape grid which forms the primary support for the suspended ceiling. The Main Runner is suspended from the top fix (or ceiling above) by a combination of suspension wire and some specialist fixings. Installation Method