Manhole covers?

[The Medway Handyman]

I look after an office complex & grounds. Outside each building is a
pressed steel manhole giving access to the water meters & stopcocks.

One of these frames is badly corroded & the cover is falling in, another
is on the way.

Measuring the outside dimensions of the steel frame, they are 475mm x
710mm. There is a concrete filet around each measuring 610mm x 840mm.

I can't seem to find the right size cover & frame. Standard seems to be
600mm x 450mm.

Am I measuring the right thing? Is a standard 600 x 450 manhole not
actually that size?



--
Dave - The Medway Handyman www.medwayhandyman.co.uk

[Brian Gaff]

Round here the mob at Thames Water have beaver away recently replacing metal
with plastic, and they look like rather than lasting tens of years, they
will last tens of minutes. However they seemed to do minimal fiddling about
other than a bit of drilling and cement around the edge, so maybe they get
them made specially.
Brian

--
From the Sofa of Brian Gaff Reply address is active
"The Medway Handyman" <davi...@blueyonder.co.uk> wrote in message
news:R30wt.114006$Wt5....@fx24.am4...

[Phil L]

What's underneath the frame when you take the lid up? - brickwork or
concrete rings?
Why is there a 2ft by 2ft 6 fillet around each manhole?

You may have to chip some of this concrete fillet up and use a bigger frame
and lid.

BTW, you don't measure the outside of the frame - you measure the lid, some
frames are wider than others externally, again, you may need to get the
grinder out.

[The Medway Handyman]

On 18/06/2013 20:51, Phil L wrote:
> The Medway Handyman wrote:
>> I look after an office complex & grounds. Outside each building is a
>> pressed steel manhole giving access to the water meters & stopcocks.
>>
>> One of these frames is badly corroded & the cover is falling in,
>> another is on the way.
>>
>> Measuring the outside dimensions of the steel frame, they are 475mm x
>> 710mm. There is a concrete filet around each measuring 610mm x 840mm.
>>
>> I can't seem to find the right size cover & frame. Standard seems to
>> be 600mm x 450mm.
>>
>> Am I measuring the right thing? Is a standard 600 x 450 manhole not
>> actually that size?
>
> What's underneath the frame when you take the lid up? - brickwork or
> concrete rings?

Its brickwork.

> Why is there a 2ft by 2ft 6 fillet around each manhole?

Thats the overall size, twit!

>
> You may have to chip some of this concrete fillet up and use a bigger frame
> and lid.

My thoughts, but finding one isn't easy. 600 x 450 seems the standard &
thats far too small.

>
> BTW, you don't measure the outside of the frame - you measure the lid, some
> frames are wider than others externally, again, you may need to get the
> grinder out.
>
>

The lid fits inside the frame.

[polygonum]

Might not be what you want, but range of sizes seems pretty comprehensive:

http://www.manholecovers.co.uk/products.html

--
Rod

[Unbeliever]

Sigh,

As long as the concrete/brick opening at the top of the manhole is smaller
than the cover you want to fit, then simply take the old one up, cut away
any bedding under and around it, drop the nearest sized, new cover frame
into the hole that's left (enlarging it slightly to fit if needed), level
the frame up if needed by using bits of slate etc and then re-bed the thing
in with your choice of bedding/finish - sand/cement, concrete, tarmac, spit,
mastic etc.

Jeesh! Such a fuss over what really is a simple job.

[The Medway Handyman]

On 18/06/2013 22:47, Unbeliever wrote:
> The Medway Handyman wrote:
>> I look after an office complex & grounds. Outside each building is a
>> pressed steel manhole giving access to the water meters & stopcocks.
>>
>> One of these frames is badly corroded & the cover is falling in,
>> another is on the way.
>>
>> Measuring the outside dimensions of the steel frame, they are 475mm x
>> 710mm. There is a concrete filet around each measuring 610mm x 840mm.
>>
>> I can't seem to find the right size cover & frame. Standard seems to
>> be 600mm x 450mm.
>>
>> Am I measuring the right thing? Is a standard 600 x 450 manhole not
>> actually that size?
>
> Sigh,
>
> As long as the concrete/brick opening at the top of the manhole is smaller
> than the cover you want to fit,

It's bigger, fuckwit. Haven't grasped the metric system yet, have you?

[The Medway Handyman]

Looks good, thanks. I'll give them a call.

[Martin Brown]

On 18/06/2013 17:40, The Medway Handyman wrote:

I have the same question although for the moment I am only really
interested in my domestic one with pedestrian traffic and size roughly
600x450. I have three manhole covers and they are all random sizes
apparently unrelated to the ones listed in their catalogue!

The actual size looks to be more like imperial 24.25" x 18.5" or in
metric 617mm x 470mm the frame it is in is about 5mm gap from this.
(and might well be rusted to hell if I lifted it out so I don't want to
disturb anything until I have a replacement unit in hand)

I presume modern ones really are exact metric sizes in which case can
anyone suggest where I might get a new Imperial sized lid from?

--
Regards,
Martin Brown

[polygonum]

A few years ago I had similar situation and bought a standard 600x450,
ripped out the old cover and its frame. Then mortared the new frame in
place, left it overnight, and dropped the lid in place. Lovely.

A few months later, we decided to cover the area with block paving so
replaced it with one of the ones which takes blocks...

--
Rod

[John Rumm]

He would be dropping a clanger - literally, aa the whole thing fell
though the hole!


--
Cheers,

John.

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