Rsj size for sleeper retaining wall?

Discussion in 'Builders' Talk' started by Glarhzilla, Jun 4, 2020.

  1. Glarhzilla

    Glarhzilla Member

    Changed my original plans of using gravel boards. And I've decided to use Rsj and sleeper combo. Rsj cemented vertically into the ground then sleepers slotted in. The sleepers I've looked at are 200mmx100mmx1.2m. I don't know what size Rsj to use. 152x152x23kg? Issue being a 5cm gap. Would you suggest using this and packing them out at the back to push them flush? Could use Packers they use for pvc window installation? Or is there any size Rsj you could suggest using? Any help would be appreciated.
    Thanks (Posted in landscaping aswell didn't know where to post)
     
  2. Greentram

    Greentram Member

  3. Glarhzilla

    Glarhzilla Member

    As far as my searches and knowledge I don't think we sell them here in the UK.
     
  4. Abrickie

    Abrickie Screwfix Select

    You didn’t try very hard then lol, google is a wonderful tool :rolleyes:
     
  5. Glarhzilla

    Glarhzilla Member

    Care to share ?
     
  6. Abrickie

    Abrickie Screwfix Select

    In the time it took to type that you could have typed 100x100 rsj into google and have ordered them :D
     
  7. Greentram

    Greentram Member

    Yes, but the Aussie ones are supplied in a variety of lengths and are hot dip galvanised after cutting so should have a much longer life than painted ordinary mild steel.
     
  8. Abrickie

    Abrickie Screwfix Select

    So are the ones sold here as fence posts, google away :rolleyes:
     
  9. stevie22

    stevie22 Screwfix Select

    How high is wall? What kind of soil?

    You probably don't need a lot of strength in the steels as you're going to have them at fairly close centres.

    125x76 UB will probably do you
     
  10. Glarhzilla

    Glarhzilla Member

    The wall will be 900mm and the soil is hard clay soil. Looks like a rock face it's that hard.
     
  11. Greentram

    Greentram Member

    Yes, the most likely point of failure is the posts shifting because they're not deep enough in the ground. Here our rule of thumb is as much below as above, though what's necessary is obviously a function of the soil type. In firm clay a post hole borer is the way to go. And make sure that there's suitable drainage at the base of the wall.
     
    Last edited: Jun 5, 2020
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  12. Glarhzilla

    Glarhzilla Member

    Yeah my plan was to purchase 1800mm beams. What would your suggestion be regarding the Rsj sizing? Because I don't want to spend money on Rsjs which are over kill in size , leading to higher costs. Been looking at Jarrah wood sleepers or hardwood tropical which are 125 thick. I assume better and longer lasting than standard pressure treated soft wood.
     
  13. stevie22

    stevie22 Screwfix Select

    A 152x89 UB would take the 125 thick sleeper. Extra cost around £10/ beam.

    Alternative is to stick to the smaller beam and notch the sleepers to suit
     
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  14. Glarhzilla

    Glarhzilla Member

    Thanks for the advice think I may opt for 152x89 ub. I'm probably overthinking it anyway. People use wooden posts which I assume are inferior to and form of steel work.
     
  15. TheEstonian

    TheEstonian New Member

    Wow aren’t you helpful ul
     
  16. TheEstonian

    TheEstonian New Member

    I’m wanting to do something very similar. How did you get on? Any advice?
     
  17. ChrisKent

    ChrisKent New Member

    Did you use
    Hi. Did you find a supplier for RSJ fence posts? I can’t find anything in UK for end posts or corner posts (like Aussie Retain-It system) made for a sleeper wall.
     
  18. Adamfya

    Adamfya Active Member

    Any decent fabrication place will make what you want. Use chanel for ends, two chanels welded at off set for a corner
     
  19. Glarhzilla

    Glarhzilla Member

    Hi mate. I didn't go down this route as in the end the cost became more than I wanted to spend for the amount I needed. Steels alone were approx £1-1.5k that was to have them powder coated also.
     

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