Manhole cover

[bodgeitandscarper]

Ive been asked to replace an old hinged cast iron manhole cover and just wondered what i can replace it with . The existing MH is on a doctors surgery car park . Ive found a steel screw down MH lid with load a load rating of 10 tons but Im not sure how much a bin wagon weighs. any advice would be appreciated.

[Dave_L]

What size is it?

This page will help http://www.pavingexpert.com/drain05.htm#covers

A Class C250 25 ton cover will suffice......

[bodgeitandscarper]

600 x 600 so take it im well off the mark

[bodgeitandscarper]

I am going to use a D400, 100mm deep as at least then i know nowt should happen to it. I am going to bed it on mortar but if the manhole needs raising two inches can i still use mortar or should it be concrete instead?

[lutonlagerlout]

cut engineering bricks bedded on mortar
mortar should not be more than 15mm thick 10mm is ideal
LLL

[simeonronacrete]

You can use Monoset Mortar to raise the frame, it'll gain enough strength in 2 hours to take car traffic.

See page 2 of this document
http://www.ronacrete.co.uk/ProductFiles/TDS/monoset.1.concrete.pdf

[seanandruby]

...or an edging kerb laid flat and bedded on. :;):

[Dave_L]

or a 50mm pcc backedger

or even my old manky boots!



Edited By Dave_L on 1191047649

[seanandruby]

or my mother-in-laws pastry :laugh: