DIYnot
Local | Network
   DIYnot > Forums
Local | Network
DIYnot Network Local DIYnot Network Local  
  Forum IndexForum Index     RulesRules    HelpHelp     Join FREERegister Free     About CookiesCookies     SearchSearch     LoginLogin 

Replace Concrete Manhole Cover

Goto page 1, 2  Next
 
Post new topic   Reply to topic    DIYnot.com Forum Index > Building
Search this topic :: View previous topic :: View next topic  
Author Message
pcsparky

from United Kingdom

Joined: 14 Mar 2007
Posts: 121
Location: Yorkshire,
United Kingdom

PostPosted: Thu Sep 13, 2007 3:43 pm Reply with quote

I would like to replace this manhole cover with one that is recessed to accept cut paving or blocks. As you can see the fitting is completely concrete.

Any advice please on removing the concrete and replacing with a recessed metal one.

[/img]
Back to top
 Alert Moderators

If you do not want to see this advert, click here to login or if you are new click here to join free.
noseall

from United Kingdom

Joined: 02 Feb 2006
Posts: 19603
Location: Staffordshire,
United Kingdom
Thanked: 1137 times

PostPosted: Thu Sep 13, 2007 4:58 pm Reply with quote

first you need to lift the lid out of the frame and see how the frame is fitted to the inspection chamber walls.

it may be a case of removing the concrete surrounding the frame, remove the frame and lid and replace with a recessed one.

if there isn't tolerance for the new lid, and if the manhole is made from brick, it will be possible to remove a course of bricks and deal with the new frame from there.

if the i.c. is prefabricated rings then you will either have to do a lot of digging or hire a grinder. icon_eek.gif
Back to top
 Alert Moderators
pcsparky

from United Kingdom

Joined: 14 Mar 2007
Posts: 121
Location: Yorkshire,
United Kingdom

PostPosted: Thu Sep 13, 2007 5:35 pm Reply with quote

icon_smile.gif Perhaps this will assist in your answer. Thanks very much.

Back to top
 Alert Moderators
noseall

from United Kingdom

Joined: 02 Feb 2006
Posts: 19603
Location: Staffordshire,
United Kingdom
Thanked: 1137 times

PostPosted: Thu Sep 13, 2007 6:08 pm Reply with quote

that looks like a very shallow i.c.

oh dear. icon_rolleyes.gif

are you any good at re-building man holes?
Back to top
 Alert Moderators
Thermo

from United Kingdom

Joined: 21 Oct 2004
Posts: 9982
Location: Sussex,
United Kingdom
Thanked: 148 times

PostPosted: Thu Sep 13, 2007 6:46 pm Reply with quote

is the cover at finished level of the new block paving or is it too high?
Back to top
 Alert Moderators
noseall

from United Kingdom

Joined: 02 Feb 2006
Posts: 19603
Location: Staffordshire,
United Kingdom
Thanked: 1137 times

PostPosted: Thu Sep 13, 2007 7:34 pm Reply with quote

Thermo wrote:
is the cover at finished level of the new block paving or is it too high?


from a regulations point of veiw, that existing cover is about 2" too high.
Back to top
 Alert Moderators
Thermo

from United Kingdom

Joined: 21 Oct 2004
Posts: 9982
Location: Sussex,
United Kingdom
Thanked: 148 times

PostPosted: Thu Sep 13, 2007 7:36 pm Reply with quote

if your refering to the dpc then there are ways around it that a bco would accept, providing its not coming any higher, otherwise how are you at rebuilding manholes? icon_lol.gif
Back to top
 Alert Moderators
pcsparky

from United Kingdom

Joined: 14 Mar 2007
Posts: 121
Location: Yorkshire,
United Kingdom

PostPosted: Fri Sep 14, 2007 9:12 am Reply with quote

These monstrosities are all the way around our house, put in about 30 years ago by a builder that built the house for himself. Not exactly sure why there are so many, there are about 8. Tried to get some plans from Water Authority but they don't have any.

This particular one is very proud of the surrounding concrete. In this location I am able to lay flags straight on to the concrete and still be a bit more than 15cm below DPC and below the airbricks.

Not sure what an i.c. is that was mentioned.

The top of the pipe in this photo is 20cm from the gap between the concrete collar and the manhole. It's hard to see on the photos but the collar doesn't look as if it's attached to the manhole just resting on it with a lip.

I was wondering whether it was a simple case of removing the collar and replacing with a new lid and surround/collar. As I say I can build up the surrounding area if necessary with flags, alternatively I don't mind removing the surrounding concrete path and replacing entirely.

Unfortunately my skills end there, I've no idea how to replace an actual manhole.

[/img]
Back to top
 Alert Moderators
noseall

from United Kingdom

Joined: 02 Feb 2006
Posts: 19603
Location: Staffordshire,
United Kingdom
Thanked: 1137 times

PostPosted: Fri Sep 14, 2007 3:50 pm Reply with quote

so long as the finished level, once paved, is 150mm below dpc and does not in any way stifle the air bricks then maybe you're in luck.

recessed i.c. (inspection chamber) lids are rather deep though, around the 100mm mark. if you think you have the tolerance then go for it.

it is a simple case of hammering up the old lid and frame ane re-bedding the new one. the existing concrete cover is fitted separately to the i.c. ring and is completely removable.

i'm not completely convinced that you have the room to do it though, but my observations are from an office chair!
Back to top
 Alert Moderators
pcsparky

from United Kingdom

Joined: 14 Mar 2007
Posts: 121
Location: Yorkshire,
United Kingdom

PostPosted: Fri Sep 14, 2007 4:23 pm Reply with quote

icon_smile.gif Thanks for the advice noseall.

I think you're right, I didn't realise the recessed were that deep. If I was to fit a steel lid would that be less deep?
Back to top
 Alert Moderators
pcsparky

from United Kingdom

Joined: 14 Mar 2007
Posts: 121
Location: Yorkshire,
United Kingdom

PostPosted: Fri Sep 14, 2007 4:41 pm Reply with quote

Further to my last. I've just found these 45 mm recessed lids with 58mm frames on:

http://www.manholecovers.co.uk/access-covers/mhc-7100-series.html

I should be able to fit one of these I would have thought and fill the recess with flag stone and flag the surrounding area.

Not sure if they're a good price. They're wanting 105 plus delivery for:

750 x 600mm Internal Clear Opening (830 x 680mm across frame) 45mm Deep
Back to top
 Alert Moderators
noseall

from United Kingdom

Joined: 02 Feb 2006
Posts: 19603
Location: Staffordshire,
United Kingdom
Thanked: 1137 times

PostPosted: Fri Sep 14, 2007 4:51 pm Reply with quote

these frames are designed to take internal floor finishes such as floor screed and tiles etc, and aren't wholly suitable for external paving situations.

the paving type recessed i.c. covers are flat sided and will deal with paving plus bedding.
Back to top
 Alert Moderators
pcsparky

from United Kingdom

Joined: 14 Mar 2007
Posts: 121
Location: Yorkshire,
United Kingdom

PostPosted: Fri Sep 14, 2007 5:53 pm Reply with quote

I see icon_eek.gif

I think I'm going to be limited due to depth to a normal steel one. Are the cheap ones in Wickes and B&Q any good or would you advise getting one from a builders merchants or online company such as the one I posted?

I would prefer one thats's not going to rust quickly and would rather pay extra for quality if the DIY stores are no good.
Back to top
 Alert Moderators
noseall

from United Kingdom

Joined: 02 Feb 2006
Posts: 19603
Location: Staffordshire,
United Kingdom
Thanked: 1137 times

PostPosted: Fri Sep 14, 2007 6:17 pm Reply with quote

our local builders merchant supplies these,http://www.clark-drain.com/
Back to top
 Alert Moderators
pcsparky

from United Kingdom

Joined: 14 Mar 2007
Posts: 121
Location: Yorkshire,
United Kingdom

PostPosted: Sat Sep 15, 2007 3:42 pm Reply with quote

Thanks for all your help. icon_lol.gif
Back to top
 Alert Moderators
Search this topic :: View previous topic :: View next topic  
Post new topic   Reply to topic    DIYnot.com Forum Index > Building All times are GMT
Goto page 1, 2  Next
Page 1 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Similar Topics   Replies   Views   Posted 
Concrete cantilever porch canopy - Repair or Replace 9 240 Tue Jun 26, 2012 2:25 pm
Concrete floor - dig up and replace or insulate on top???? 12 7280 Tue Feb 09, 2010 9:25 pm
Sulphate Attack - Replace with Concrete or Suspended timber? 6 460 Mon Oct 25, 2010 4:02 pm
Replace clay gully for plastic one? 2 80 Mon May 21, 2012 7:10 am
Need to replace an Air Brick 6 120 Mon May 07, 2012 8:17 pm


 
DIYnot
Find an Expert | Find a Supplier | Search DIYnot.com
Network | Advertising | Newsletter
DIY | DIY How To | @home | DIY Wiki | DIY Forum
By using this site you agree to our Terms of Service / Disclaimer.
Please read our Privacy Policy. Copyright © 2000-2014 DIYnot Limited.