![]() I tested an 8mm BeeLine E2E sent to me by someone on one of the forums. Too short, too much taper, too little braid and Brummel will unravel before reaching its already very low holding strength. ![]() The crucial issue if you use an LB to protect you against a short bury is to make sure the bury is long enough with enough braid integrity that the Brummel, should the splice come apart, is truly locked. In the event the splice comes apart and the LB takes the full load, it is quite weak (I have measured LB's breaking at about 30% of nomimal rope strength). The LB in that case (an E2E split tail, for example) gives the sling a guaranteed minimum strength should the splice slip apart. But if it is full length, then what is the point of the LB?įor my money the real (only?) value of the LB is when you absolutely don't want or can't use a full-length bury. If you don't want your splice to come apart, use a full-length bury, LB or not. You undoubtedly can use a somewhat shorter bury if a locked Brummel is present because the LB does have a certain amount of holding power (but much less than an unlocked Brummel). If it weakens the rope, are you saying the rope then breaks in the middle of the locked Brummel? If not, in what way does it weaken the rope? I have tested this a number of times and found no difference in strength if the LB is present or not. ![]() So, I grabbed one that I had little info on.īrion, the locked brummels didn't weaken the rope significantly. We got to talkin about splices and their stitching method and they offered to break a splice if I had one available. I met the Sterling reps at ISA in Chicago at the Morton Arboretum. Had some testing done at Samson and some done locally. Jim Cass from Samson and Dick Hildebrandt of Yale in the past. I've worked with Howard Wright, when he was still with NER, The rope manufacturer doesn't make that product in a 5/16's diameter any more, but the PBS was 6,200 lbs., which I thought was kinda low. I'm sure you have done far more rope testing than I. What other tests have you conducted?īrion, the locked brummels didn't weaken the rope significantly, but in arborist rigging, with the repeated shock loads, we thought the 'cycles to failure' would come more into play using locked brummels versus straight buries.įor eye & eye hitch cords, I'm sure locked brummels are what most climbers prefer. This has to do with how the splice is drawn up. Brummels will weaken a rope, I think, only if they are bearing any load at high load. What was the rated strength of that 5/16"? In looking at other single braid ropes, 5/16" is about 30% weaker than 3/8". In the tests we've done, the locked Brummel hasn't seemed to weaken the rope significantly.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |