I want to mount some equipment into a polyethylene (PE) shaft. I can't bolt or drill directly into the walls, but the supplier of the shaft can weld little PE blocks onto the wall: 50x50x50 mm, with bolts pressed into the blocks.

I have about 30kg worth of piping and valves etc, most of the weight will be borne by the ground actually but I need an additional attachment point higher up. My idea was to have two of these blockse mounted on the walls, with a steel rail between them paralell to a section of pipe to attach the pipe via one or two hangers. The shaft is 1 m across, the horizontal rail will be about 0,8m. I will have shear on the blocks but no moment. The wall thickness of the shaft is at least 10mm.

At this point I don't need exact structural calculations, I need to know if this is feasible so i can leave it to the contructor to figure out, or if I need to spend more brainpower on the issue.

I understand there are plate welds and butt welds in the PE world? In either case, how much load can expect one my little blocks to bear?

  • $\begingroup$ Polyethylene ... I'll add a link. $\endgroup$
    – mart
    May 27, 2016 at 11:19
  • $\begingroup$ A picture is worth 1000 words. I can't begin to visualise what you are talking about from your verbal description. $\endgroup$
    – alephzero
    May 28, 2016 at 2:56
  • $\begingroup$ next time I'm near a scanner ... $\endgroup$
    – mart
    May 28, 2016 at 20:52
  • $\begingroup$ Any update on this? Or is the time long past? $\endgroup$
    – hazzey
    Aug 25, 2018 at 1:54
  • $\begingroup$ The times long past. $\endgroup$
    – mart
    Aug 27, 2018 at 6:52


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