Loads on Flange of Rafter
Loads on Flange of Rafter
(OP)
The erector wants to use a saftey harness that clips onto the top flange of the rafter. I need to figure out if the rafter will be able to hold the loads that the harness is perscribed to hold. Attached is a diagram showing the loads. There is a concentraded vertical load on the flange of the beam as well as a moment. I am not sure how to check if the fange can hold this load.
Thanks for any help.
Thanks for any help.






RE: Loads on Flange of Rafter
On the other hand, if you are the erector, you have a relatively straightforward problem in static analysis. However, if you have to ask how to do this, you'd be better off hiring someone who has experience to guide you.
My humblest opinion only...
RE: Loads on Flange of Rafter
The loads required are ultimate limit states and the joist only needs to sustain the loads for an instant if someone does fall (impact loading). I would check the joist for strong and weak axis bending. I don't believe the structure will fail in torsion, it will twist excessivley. I wouldn't rely on the installers recommendation when they say "it's safe and they have done some testing" because they probably won't have a clue.