As from Ple4Win version 4.5.0 mitre bends can be configured. In table POLYDIF two extra columns define the shape of the mitre bend.

 

PolydifMitre

 

Column 'ETYP' is extended with a 'Mitre bend' option. Column 'N-KINK' defines the number of kinks and 'L-SEGM' the distance between the kinks.

 

When the Analysis type is set to 'General' the BENDFAC parameters K, SIX and SIF are calculated according to the TGSL-1986. For the other analysis types the parameters are calculated according to NEN 3650-1+C1:2017. The TGSL method has proven to give more accurate results than the NEN method.

Info In case of single kink mitre bends, the bend radius (or segment length) should be entered as described in the POLYDIF data description page.

 

A couple of rules apply when calculating mitre bends:

 

MitreDrawing

 

  Parameter

General

NEN

  Angle 2α

≤ 25°

≤ 15°

  C (crotch)

≥ 1Do

  R (radius)

≥ 2.5 r

 

The data entered in POLYDIF on top of this page will result in the configuration shown below:

 

MitreVisualised

 


H20012, last changed: 2/15/2019