Knee stick

Knee stick (schematic)

As jamb (or jamb or Trempel ) is defined as the on the eaves side brick exterior wall of a house on the bare ceiling of the last upper floor addition, on which the roof structure rests. The higher the knee, the more space is available under the sloping roof. In Bavaria, the knee is often made of wood on the long side without plastering. Since there is no legal definition of the jamb height, further specifications are required as to how it is to be measured. It is generally accepted that the knee stick begins from the upper edge of the raw ceiling of the floor below. There is no uniform use of the term for the end of the knee stick. In the greatest extent of the knee stick, this extends to the imaginary intersection of the outer wall with the upper edge of the rafter . The smallest dimension is when the knee is understood to mean only the wall that goes beyond the attic ceiling (excluding the purlin ). Other methods of measurement are used between these possibilities. A maximum jamb height is often specified in the development plan in order to subordinate the top floor to the lower floors in terms of design.

Harmonization in Switzerland

In the intercantonal agreement on the harmonization of construction terms , the measuring points for the knee stick are regulated in Chapter 5.3. However, deviating regulations are also possible, provided they are properly documented.