The Impact of EN-20 and EN-50 in Clips

摘要

In accordance to the EN-20 and EN-50, friction forces exerted by clips on the guide rails have to be included in the guide rail calculation. The fact of considering clip friction forces can result in requiring bigger guide rail sizes with higher material cost. The use of existing clips in the market with very high friction forces, such as forged ones, will be limited to short buildings, whereas those with an elastic behavior can affect the guide rail selection. This paper contrasts conventional clips and the new concept of adjustable clips with ultra-low friction forces and high resistance that are suitable for EN-20 and EN-50 calculation.