BKR-box-type rib for blackboard construction, has front and support belts arranged parallel to one another with variable distance and connected with bars at both sides, where hollow space formed between belts is filled with insulation

摘要

The rib has front and support belts arranged parallel to one another with a variable distance and connected with bars comprising Purenit-plates, at both sides. A hollow space formed between the belts is filled with insulation. The belts are made up of construction solid wood KVH-NSI (RTM: Not defined). The rib is of three different standard types such as light, middle or strong with 80 millimeter wide. The plates are fastened on the belts with aluminum groove nails.