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#1 | ||
NC Fairlane Ghia
Join Date: Nov 2005
Location: Melbourne
Posts: 535
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Hi guys,
Does anyone know the correct auger size to get for a post hole digger to use for putting in the Steel H sections for a sleeper retaining wall? Is it 250mm?
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Curent Rides: -NC Fairlane Ghia 3.9L -XC RallyPack Ute 5.8L -AU Falcon Wagon 4.0L Still Stock -80 Series LandCruiser 4.5 LPG |
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#2 | ||
FF.Com.Au Hardcore
Join Date: Aug 2013
Location: Cairns FNQ
Posts: 602
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In Qld. the council has to OK plans for retaining walls over certain height and I think the footing dimensions would be on the plans, don't know about Vic.
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#3 | ||
FF.Com.Au Hardcore
Join Date: Apr 2012
Location: Taromeo
Posts: 10,441
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It also depends on the size of the post.
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#4 | ||
Performance moderator
![]() Join Date: Feb 2005
Location: St Clair..N.S.W
Posts: 14,875
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300 mm or larger if it requires better footing .. Back filled with blue stone and concrete .. I would lean hole & pole 5*+ towards bank ..
Edit I would go 50mm above H section.. I thought it was a 250mm pipe ..
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#5 | ||
GT4.
Join Date: Dec 2004
Posts: 4,218
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450mm auger for a retaining wall is what to use mate. Order some concrete from your chosen concrete mob, or if you don't need that much, buy some readimix bags (NOT quickset - it's rubbish) which are structural rated, and enjoy mixing them yourself.
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#6 | |||
Budget Racer
Join Date: Dec 2004
Location: Melbourne
Posts: 2,418
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Quote:
In Victoria anything over 600mm high requires an engineer, seriously.
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#7 | ||
NC Fairlane Ghia
Join Date: Nov 2005
Location: Melbourne
Posts: 535
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Thanks Guys
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Curent Rides: -NC Fairlane Ghia 3.9L -XC RallyPack Ute 5.8L -AU Falcon Wagon 4.0L Still Stock -80 Series LandCruiser 4.5 LPG |
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#8 | ||
NC Fairlane Ghia
Join Date: Nov 2005
Location: Melbourne
Posts: 535
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Hi Guys,
How far do you think I can space the posts? i was told that i can use 1.8m 75mm sleepers with the H posts and it should be fine. Does this sound right?
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Curent Rides: -NC Fairlane Ghia 3.9L -XC RallyPack Ute 5.8L -AU Falcon Wagon 4.0L Still Stock -80 Series LandCruiser 4.5 LPG |
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#9 | ||
FF.Com.Au Hardcore
Join Date: Apr 2012
Location: Taromeo
Posts: 10,441
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You need to give us some more information so we're not second guessing.
![]() Height, length, H section, soil... |
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#10 | ||
FF.Com.Au Hardcore
![]() Join Date: Nov 2007
Location: Riff
Posts: 12,352
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What sort of sleepers are you using? I assume timber. I used concrete sleepers with H beams to construct retaining walls at my new house, 1.8 was fine for them- but they have reinforced rods running through the sleepers. I think 1.8 spacing is to much for timber as they bow,
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#11 | ||
NC Fairlane Ghia
Join Date: Nov 2005
Location: Melbourne
Posts: 535
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height will be 1m length 15m, using H sections soil has a bit of clay on the bottom half
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Curent Rides: -NC Fairlane Ghia 3.9L -XC RallyPack Ute 5.8L -AU Falcon Wagon 4.0L Still Stock -80 Series LandCruiser 4.5 LPG |
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#12 | ||
Donating Member
![]() Join Date: Oct 2013
Location: Wellington NZ
Posts: 11,061
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Imo err on the side of caution. Put uprights at the halfway mark as well. Especially if the land behind slopes upwards and actually puts pressure on the sleepers. They will bow eventually, just through continual weather exposure, over engineer it for longevity
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#13 | |||
NC Fairlane Ghia
Join Date: Nov 2005
Location: Melbourne
Posts: 535
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Quote:
Hi Mate, I dont think I have the option of going uprights at the halfway mark as I am using H beams
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Curent Rides: -NC Fairlane Ghia 3.9L -XC RallyPack Ute 5.8L -AU Falcon Wagon 4.0L Still Stock -80 Series LandCruiser 4.5 LPG |
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