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Posted: Mon Sep 24, 2007 6:25 pm
by 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.
Posted: Mon Sep 24, 2007 8:09 pm
by 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......
Posted: Mon Sep 24, 2007 10:08 pm
by bodgeitandscarper
600 x 600 so take it im well off the mark
Posted: Fri Sep 28, 2007 9:46 pm
by 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?
Posted: Fri Sep 28, 2007 11:35 pm
by lutonlagerlout
cut engineering bricks bedded on mortar
mortar should not be more than 15mm thick 10mm is ideal
LLL 
Posted: Fri Sep 28, 2007 11:36 pm
by 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
Posted: Fri Sep 28, 2007 11:56 pm
by seanandruby
...or an edging kerb laid flat and bedded on. :;):
Posted: Sat Sep 29, 2007 7:33 am
by Dave_L
or a 50mm pcc backedger 
or even my old manky boots!
Edited By Dave_L on 1191047649
Posted: Sat Sep 29, 2007 8:54 am
by seanandruby
or my mother-in-laws pastry :laugh: