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 Post subject: Mot Pit
PostPosted: Mon Feb 05, 2018 7:30 pm 
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Hey all, glad to be a member of the forum now. been watching it for a while.

Now ive taken many projects on before, but this one is new to me. ive built many walls for myself and shed bases.

im building an MOT pit for my new garage. its 7.5m long, 2m deep and 1m wide, thats the finnished opening. now ive been told by different builders different ways of blocking it but now im in a mess. i was going to use 215 hollows filled after but the cost is very high and after paying 40k for the test lane im now on a very tight budget. another builder told me its perfectly acceptable to use 140mm dense all the way up with 3 piers. now this is more within my budget however im unsure itll hold back the ground?. my ideal plan would be

6-9" base slab laid at 8mtr x 2mtr
140mm dense blocks all the way up to 1.8mtr then my angle iron for pit jack on top.
all blocking would be formed in a single loop so corners tied in etc
piers at every 2 mtr or even spread.

do you think the 140mm will be ok?? some old timers have said they used to build there old pits with aerated blocks and there still in use today.

cheers all!


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 Post subject: Re: Mot Pit
PostPosted: Mon Feb 05, 2018 8:28 pm 
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I've done a few mot stations ,most were pre formed pits but when blocked 9 inch hollows with tie rods vertically and horizontally
one large pit I did for a steam engine complete with removable rail tracks was in140 solids but was backfilled with lean mix bottom to top ,
general rule is anything above three ft is hollows filled


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 Post subject: Re: Mot Pit
PostPosted: Wed Feb 07, 2018 1:17 am 
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:withstupid:

I agree.


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 Post subject: Re: Mot Pit
PostPosted: Wed Feb 07, 2018 6:58 am 
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Thanks guys. What was the depth of the back fill?


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 Post subject: Re: Mot Pit
PostPosted: Wed Feb 07, 2018 7:31 pm 
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9inch hollows over starter bars, filled solid with concrete, backfill between block and digout.

maybe think about a sump pump



For this message the author cotswold builders has received gratitude : marf
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 Post subject: Re: Mot Pit
PostPosted: Wed Feb 07, 2018 7:54 pm 
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cotswold builders wrote:
9inch hollows over starter bars, filled solid with concrete, backfill between block and digout.

maybe think about a sump pump

thanks cotswold, im going to do it in hollows with a 8x2 base i think. no point messing around. cheers all


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 Post subject: Re: Mot Pit
PostPosted: Wed Feb 07, 2018 8:19 pm 
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As this topic seems to be answered, and I didn't understand a word of it......

Isn't it unusual these days for MOT stations to be over a pit? Though I prefer them, having one low-slung car, most I've been to (four vehicles over many years) seem to use hydraulic lifts. Even the council depot where I took Class 7 vans.


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 Post subject: Re: Mot Pit
PostPosted: Wed Feb 14, 2018 12:13 am 
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Have a steel liner made to suit, drop it in, and backfill with concrete.

Done a fair few, last one was a baby at 6m long.

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 Post subject: Re: Mot Pit
PostPosted: Wed Feb 14, 2018 7:42 am 
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Don't forget never try to put a three wheeler over the pit :lol: I have seen it done!! :cb Nos


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