I have a problem, I fairly new to houdini, I have a moderate scene of a rope wood bridge breaking down scene, and I would like to complete my shot with Houdini (Switching from Maya). So I started doing some RnD, and decided to go with simulating a tearable cloth and using this as a starting point for my sim..
So I followed the steps below.

1) make a thin long cloth with edge points constarined, have the same number of subdivisons as plank count. (WORKS)
2) create points at the center of these faces after the simulation node. (WORKS)
3) Copy the simulated objects point normals to the newly generated point normals which are at the center of the each face.( SEEMS TO BE WORKING)
4) Use a copy node with stamp to randomize the size,scale and rotation , to copy one plank for one point. (WORKS)

The problem is, bridge breaks in the middle, where one side of the planks are following the normals as intended the other side the planks seems to flip 180degrees as they become perpendicular to the Z axis. ???

Please help me out here. thanks in advance.

Maybe a simple way is to use Absolute !

Check attached file :

hey man thanks for the answer, althou it seems to fixe the flipping error, however introduces wrong orientation throu the sim