Frans..... pic 45491 Euc tree is always getting hit by high winds and it's right in the open area. Last yr this tree drop two large limbs near were the kids do there activities and there was a great concern ...
pic 45483 speed line set up fiddle block,rigger plate ,loop runners , steel hard -trap beaners for the slide line or for the plate 1 aluminum bushing and a port-a-wrap not showned.
I slack the fiddle block after i've secure the speed line to a port-a-wrap or a steel figure 8 to my anchored point.
The fiddle blocks are not designed to bear the shock load of dropping limbs into the system.
I 've seen tree crews speed line big wood , the one thing you need to remember is to avoided the vector force and the drop , and make sure you have one strong anchor point..