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Author Topic: base dimensions  (Read 11024 times)

Gippslander

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base dimensions
« on: November 22, 2014, 09:06:43 AM »
Hi

I am currently making the concrete base for my listeroid and I am planning on using 15mm bolts/studs  in the concrete . The bolt pattern on my listeroid is 331 mm square , or  13" .




« Last Edit: November 22, 2014, 11:00:17 AM by Gippslander »
Gippsland is in the S.E. corner of mainland Australia

mike90045

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Re: base dimensions
« Reply #1 on: November 22, 2014, 03:06:56 PM »
some thoughts before you pour:

Tom has an elevated chunk of concrete, getting the engine up to a easy access height (sorry - didn't see the photos at first)
 Will that form bulge, will it need some 2x4 mid way to brace it ?

Are you bolting right into the concrete ?  Where do the flywheels go ?

How does the mounting of the generator head relate to the engine - will they be on a frame, or bolted to concrete ?

I drilled into the concrete and used structural epoxy to anchor all-thread, provides a little bit of shock buffer, it's possible for vibrating threads to chew up the concrete. And I've heard you get a stress riser in the 1/8"  of bolt between the concrete and mounting nut, that short piece of bolt has to handle all the load and can get really stressed. (use s small dowel to cast a pilot hole)

Lots of rebar right ?  and a high strength mix, not post hole mix.

dieselgman

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Re: base dimensions
« Reply #2 on: November 22, 2014, 03:18:53 PM »
The vibration stresses could become an issue if your fasteners are not up to it in both length and girth. Long 1/2" or 5/8" J-bolts (10" to 12") cast right into your concrete mass should be the strongest configuration. Go for 3500 psi concrete - 1 extra bag cement per cubic yard should do it. Give it plenty of time to cure prior to stressing the bolts - at least 7 days.

If you are mounting your engine block directly onto the concrete, then very careful leveling of the mounting surface is important. You want a good uniform bearing on all 4 of your mounting corners.

If you are just anchoring an iron or steel platform or skid of some sort to hold the engine and generator, then just about anything will work fine.

dieselgman
« Last Edit: November 22, 2014, 03:28:45 PM by dieselgman »
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Gippslander

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Re: base dimensions
« Reply #3 on: November 23, 2014, 07:57:11 AM »
Thanks for the advice . Yes I will cast the bolts into the concrete , tomorrow I am hoping to buy some good 5/8" bolts  . And yes I plan on using some steel reinforcement mesh in the block . Will make the mix nice and strong  Mike
Gippsland is in the S.E. corner of mainland Australia

overbore

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Re: base dimensions
« Reply #4 on: November 27, 2014, 03:22:40 AM »
I think we all agree on the mounting basics but I suggest using no less than Grade5 hardware. I added vibration pads under the I beam mounts, from McMaster-Carr.
Best wishes,
overbore

Gippslander

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Re: base dimensions
« Reply #5 on: November 27, 2014, 08:58:16 AM »
The concrete pour has been done  :o I bought some 16mm zinc plated bolts and these are set into the concrete . I mixed the concrete myself , manually . The bolts are 10" deep in the concrete . I was looking for nylock nuts , but instead I found some joiners, these are 2" long hex shaped nuts .


I am thinking of wood for the bearers rather than steel .  The wood has a dampening effect and will cushion the vibrations of the Listeroid  ???.

Mike


« Last Edit: November 27, 2014, 09:19:49 AM by Gippslander »
Gippsland is in the S.E. corner of mainland Australia

Hugh Conway

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Re: base dimensions
« Reply #6 on: November 27, 2014, 05:33:50 PM »

Works for my installation:

 4 pcs 3/4" threaded rod 18" long bent and set in concrete. The rod is used to attach 6" X 8" Fir bearers to the concrete block. Timber washers and double nutted.
6/1 is bolted to two 3" X 3" X 4' lengths of steel angle. 1/2" bolts welded to bottom side of angle.
Angle is lag bolted to the Fir bearers. (8 ea 1/2" X 6" lag bolts)
All stuff I had on hand at the time.
About 550 hours in two years of running.
Nothing has  broken or worked loose. seems happy.

Cheers, Hugh
JKson 6/1  (Utterpower PMG ) Off-grid
Lister 6/1 Start-O-Matic engine......running with PMG
1978 Royal Enfield (glutton for punishment by Indian iron)
1963 BMW R-27 project

Gippslander

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Re: base dimensions
« Reply #7 on: November 28, 2014, 01:09:20 AM »

Works for my installation:

 4 pcs 3/4" threaded rod 18" long bent and set in concrete. The rod is used to attach 6" X 8" Fir bearers to the concrete block. Timber washers and double nutted.
6/1 is bolted to two 3" X 3" X 4' lengths of steel angle. 1/2" bolts welded to bottom side of angle.
Angle is lag bolted to the Fir bearers. (8 ea 1/2" X 6" lag bolts)
All stuff I had on hand at the time.
About 550 hours in two years of running.
Nothing has  broken or worked loose. seems happy.

Cheers, Hugh

Hi Hugh

Sounds like the way to go  ;)   Can you post a pic of your setup ? 

Mike
Gippsland is in the S.E. corner of mainland Australia

Hugh Conway

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Re: base dimensions
« Reply #8 on: November 28, 2014, 02:01:11 AM »
« Last Edit: November 28, 2014, 02:02:48 AM by Hugh Conway »
JKson 6/1  (Utterpower PMG ) Off-grid
Lister 6/1 Start-O-Matic engine......running with PMG
1978 Royal Enfield (glutton for punishment by Indian iron)
1963 BMW R-27 project

Gippslander

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Re: base dimensions
« Reply #9 on: November 28, 2014, 08:55:58 AM »
Gippsland is in the S.E. corner of mainland Australia

Gippslander

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Re: base dimensions
« Reply #10 on: December 23, 2014, 09:41:28 AM »
OK  I have been concreting the floor . I bought this old cement mixer , it has a Petter A1VO  engine of 1948 vintage . The mixer performs well, it is old but it is very strong  :)  





« Last Edit: December 23, 2014, 09:48:33 AM by Gippslander »
Gippsland is in the S.E. corner of mainland Australia

dieselgman

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Re: base dimensions
« Reply #11 on: December 23, 2014, 02:49:18 PM »
I think I like your little LandRover better than the old mixer!   :)
Looks like she has had quite the working life, and plenty to go!

dieselgman
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Gippslander

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Re: base dimensions
« Reply #12 on: December 24, 2014, 11:09:11 AM »
I think I like your little LandRover better than the old mixer!   :)
Looks like she has had quite the working life, and plenty to go!

dieselgman

Ah yes , she is my workhorse, she does the firewood collecting the towing and lot of other things too

A 1950 model , she has the original 1.6 litre engine . The poor old thing would make a great project to restore .

Do you have any older cars ?   
Gippsland is in the S.E. corner of mainland Australia

dieselgman

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Re: base dimensions
« Reply #13 on: December 24, 2014, 04:27:54 PM »
I have an older Mercedes and several BMWs... used to be a VW line mechanic, lusted after Porsche in my youth. I am a bit more practical now.

I just don't think they are making anything practical with longevity any more, not like your venerable Rover.

Best Regards,

dieselgman
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Tom

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Re: base dimensions
« Reply #14 on: December 24, 2014, 08:43:12 PM »
I have a '74 IH Scout II that is my daily driver. It also hauls much of my firewood too.
Tom
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