BTN Joist hanger
are made from 3,0 thick galvanized steel sheet.
BTN joist hangers are used for hidden timber-to-timber connections. The mounting hole allows safe and comfortable hanging of the secondary beam. This way of installation does not need additional supports. The hight of the secondary beam should be at least 40 mm higher than the hight of the joist hanger. The hight of the joist hanger depends on the hight of the beam fastened. The BT 90 has a hight of 90mm, the BT4-120 a hight of 120mm and so on.
You are easily able to meet existing fire protection requirements with the hidden joist hanger according to DIN 4102.