The original cable transit
Based on the simple but clever idea of a frame with insert blocks and an end seal, The MCT Brattberg is the original transit system.
The MCT Brattberg was patented in the early 1950s. When oil rigs and nuclear power stations demanded cable and pipe installations with proven safety records, the MCT Brattberg system became a worldwide solution. And we’ve been improving it ever since. Comprehensive documentation shows that its resistance to fire, water, gas and pressure meets the latest safety requirements.
Our own experience has shown that for a standard frame used for maritime applications, an internal width of 120.5 mm +0.5 mm, a depth of 60 mm and wall thickness of 10 mm are optimal window sizes for maintaining structural strength and for fitting insert blocks. The welded corners are rounded for added strength. Both single and multiple transits frames are available.
The dimensions of the various frames have become the industry standard simply because these types of frame were first to be introduced and have proved successful over time.