The size of this seried is 38mm*24mm, purged with fire resistance hole so that it is classified as Fire-Resistance T-Bar. There is a denticulated fire-proof hole on the connector of both ends in each Mainrunner ( Cross tees). In case the grids are on fire and metals begin to expand in high temperature, the structure of the grids would not distort because the distortion merely happens to the fire-resistance hole. The ceiling would not collapse and remain horizontal for people to escape
and to do fire fighting.
Fire Resistance Type-Mainrunners L H W T Linear Measure Bars/cartoon
Classification
Imperial,
Mainrunners+
Fire resistance
hole 		12' 38 24 0.35 3660mm 25
8' 38 24 0.35 2440mm 25
Metric,
Mainrunners+
Fire resistance
hole 		3.6M 38 24 0.35 3600mm 25
2.4M 38 24 0.35 2400mm 25


Fire Resistance Type-Cross Tees L H W T Linear Measure Bars/cartoon
Classification
Imperial,
Cross Tees+
Fire resistance
hole 		2' 38 24 0.35 610mm 75
4' 38 24 0.35 1220mm 50
Metric,
Cross Tees+
Fire resistance
hole 		0.6M 38 24 0.35 600mm 75
1.2M 38 24 0.35 1200mm 50
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