DCF Shelter Construction

Discussion in 'DIY & MYOG' started by Enzo, May 7, 2020.

  1. gixer

    gixer Thru Hiker

    Yep still has the odd outing

    [​IMG]

    Recon the Duplex is a great good weather tent :thumbsup:

    I like the new free standing Duplex better though, recon deleting the poles will give easier access out the doors and give a great uninterupted view
    JKM likes this.
  2. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Fabulous. It looks like it's made of sheet metal. What a bombshelter. :thumbsup:
  3. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Good to hear, as I have a roll of the Venture tape in stock. Right, no more excuses, time to cut cuben. :D
    Tartanferret likes this.
  4. craige

    craige Thru Hiker

    If it's the one always recommended then it's 3M 9845pc acrylic transfer tape. Sometimes it will say VHB in the title too.
    Rog Tallbloke likes this.
  5. murpharoo

    murpharoo Section Hiker

    I think this is the reason that Colin (@Tramplite ) does not just bond his cuben seams.
    From Tramplite website:

    Most manufacturers simply stick their shelters together with double-sided tape leading to designs that are weaker, and pitch less taut, than a Tramplite shelter. Simply, if you want to resist wind effectively then you need a tough and taut shell. With a Tramplite shelter, every major seam is rolled twice, double sewn and finally over-bonded. This gives an immensely tough seam, comprising of a minimum 6 individual layers of DCF, that is immune to fabric de-lamination while allowing immense pressure to be applied to the pegging/guying points (which are directly attached to the seams). With shelters that are stuck together, you are effectively only bonding the 2 outer faces of plastic film together and any de-lamination of the DCF fabric can lead to catastrophic failures.
    JKM, Robert P, cathyjc and 1 other person like this.
  6. Enzo

    Enzo Thru Hiker

    I managed to peel some cuben bonded with seam grip for a few years, but I'm considering taking the inner out of my duplex copy which would mean ~6m of taped cuben to lift...:o o:
    Suck it and see I guess.
  7. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Colin's tramplite is Rolls-Royce, sturdily coachbuilt with girders and beams. Instead of an extra 5oz of sewing and tape on 45' of seams, I'm going to add an extra 3oz of carbon fibre pegs and spread the load over 18 lightly reinforced pegging points on a more 'racing monocoque' sort of design. If the single straight 12'6" seam pulls apart, I'll just roll it, stitch it, overbond it, eat some humble pie, wash it down with a toast to Colin, and try again. :D

    This tent is for duo trips with my missus Kath, whose dodgy hip prevents her from mountaineering nowadays. We'll be wild camping round the coast of Brittany with it mostly, where flat sites and easy ground-peg conditions are plentiful. It can get very windy though, hence the 18 tieouts every 20" round the hemline. I might even up it to 24 tieouts so I can place load-spreading pegs every 15" if needed. That way I can pitch as square supermid, hex, octo, dodeca or fully rounded teepee as ground conditions/weather dictates.
    Last edited: May 9, 2020
    Enzo likes this.
  8. cathyjc

    cathyjc Thru Hiker

    Undoubtably the Tramplite is way 'better' than my humble efforts.
    But I'm unlikely to ever contemplate camping in conditions Colin has designed the Tramplite to be capable in.
    And at the end of the day any shelter is only as good as the weakest element. The seams maybe the strongest - but the surrounding fabric, tie outs, pegs and peg placements may well fail long before the seams do ….
    murpharoo likes this.
  9. theoctagon

    theoctagon Thru Hiker

    Finished yet?
  10. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Cut the tyvek for the mock-up this afternoon.
    theoctagon, Dave V and Enzo like this.
  11. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Calcs are wrong. Back to the drawing board. :o o:
    theoctagon likes this.
  12. Enzo

    Enzo Thru Hiker

    Best to find out with tyvek!
    HillBelly, theoctagon and Dave V like this.
  13. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Fortunately I have plenty of tyvek left over from someone's overestimated building job (it wasn't me guv), so I can just add another piece onto the design and still make a nice big tyvek teepee. But the Cuben cutting plan needs some more thought to get adjacent panel angles right and minimise wastage. This 3D origami makes my poor old battered head hurt. :(
    Enzo likes this.
  14. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Ok. Not too big an adjustment produces an exact dimensional replica of the Golite Hex3. Here's the cut out paper model. Offcuts should finish the door and vent.

    20200510_125817.jpg
    Last edited: May 10, 2020
  15. cathyjc

    cathyjc Thru Hiker

  16. HillBelly

    HillBelly Ultralighter

    cathyjc and Rog Tallbloke like this.
  17. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Passes the time in lockdown when it's cold out. :D
  18. cathyjc

    cathyjc Thru Hiker

    Mine went into production a few years ago and is probably half way thru' it's life span now. Love it - best solo tent I've had :D.

    When I first had it @Shewie asked me if I'd ever make another and I replied " Yes, if I was 20 years younger".
    I might have to retract that and say "probably yes - when the first one wears out" :D:angelic:.
  19. Enzo

    Enzo Thru Hiker

    Looks like a superb design to me :thumbsup:
  20. cathyjc

    cathyjc Thru Hiker

    Michael_x, Rog Tallbloke and Lempo like this.
  21. Lempo

    Lempo Thru Hiker

    Camping Hoff?

  22. cathyjc

    cathyjc Thru Hiker

    Charlie83 and Arne L. like this.
  23. Enzo

    Enzo Thru Hiker

    cathyjc likes this.
  24. Enzo

    Enzo Thru Hiker

    Looking on the net to see what the current state of play is re cuben tie outs this came up. A comparison of reinforcement patch bonding methods.



    He outlines the weaknesses in the experimental procedures and I think it's a bit flawed, but to me the take away was it was always the parent material that failed not the tie out or reinforcement.
    What I'd take from that is it'd be better to have a large reinforcement of 0.5 than a smaller heavier type. I went for largeish 1.5oz and sections of a circle to try and not have any stress risers?
    I though the 1.5 would hold a stitch more securely as I bonded and sewed the tie outs.
    In hindsight i would use 0.5oz.

    I used 1.5oz cuben to attach the lonelocs, contraversial I know.
  25. Enzo

    Enzo Thru Hiker

    What glues are people using for cuben?
    hysol U-09FL seems recommended but it's ever difficult to get or stupid expensive.
    I've used seam grip before, goes off very fast though.

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