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System Overview:
CPM Group Ltd the market leader in Product Development in conjunction with Caswick the markets leading manhole step producer has developed an Integrated Manhole Ladder system.
This innovative product has been designed to provide safe access and egress to precast concrete manholes, caisson shafts and inspection chambers.
An innovative range of rungs are already pre-fitted into the chamber to make an installation of the ladder quick, cost effective, reliable and safer than conventional ladders.
The system has WRC approval and meets the essential requirements of existing and new design codes in terms of dimensions and performance.
System advantages:
The Integrated Manhole Ladder system has the innovative ladder rungs pre-fitted into the chamber so therefore the system is delivered to site partly pre-installed.
The chamber ring is then installed in the conventional way, ensuring that the ladder steps are inline.
The Integrated Manhole Ladder System has been granted WRc approval.
Ease of Installation
- The Ladder Rungs are pre-fitted at 250mm centres into the chamber section, leaving only the Stringer, Locating Bracket & End Caps to fit.
- Minimal access to a confined space to fit ladder stringers
- No lifting, drilling or temporary access required to chamber
Flexibility
- The incorporation of the Ladder Rung in the manhole automatically takes account of the variation in depth to design
- No bespoke ladder needs to be surveyed, ordered or manufactured
- No equipment hire compared to fitting traditional galvanised steel ladder
Safety
- The polypropylene polymer encapsulation gives high visibility and no sharp edges
- The rung has a tread pattern to give good slip resistance
- The stringer has a circular cross section designed to give a secure hand grip unlike a conventional ladder which is normally too large to safely hold on to.
Quality
- Ladder Rungs are Kitemarked to BS EN 13101.
- The Ladder Rungs are reinforced with high tensile steel tube.
- The ancillary fitting brackets are made from stainless steel Grade 304 or 316.
Durability
- The chemical resistance of polypropylene can be considered equivalent to Grade 316 stainless steel
Strength
- Ladder rungs pre-fitted to ensure factory controlled performance
Product Standards
- The system has been designed and manufactured in accordance with the requirements specified in
- BS EN 13101 Steps for underground man entry chambers.
- BS EN 14396 Fixed ladders for manholes
The fitting of the Integrated Ladder system is very simple and requires no temporary ladder, power supply or drilling equipment.
Review drainage scheme to establish
correct position of ladder to invert and surface.
Lower first manhole section into place.
Lower remaining sections and ensure
the Ladder rungs are in alignment.
Slide the stringers down inside the
eyelets of each of the rungs, allowing sufficient length to
accommodate benching & cover slab.
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- The bottom of the stringer can be
secured by casting the end of the stringer into the
benching.
- Depending on the ladder design
specification, the stringer can either be finished above the top
ladder rung or taken up further into the access.
- If the top of the stringer is to be
finished in the access area, it needs to be secured in place by
using the locating brackets which are mortared into place between
top of cover slab and seating rin
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Cut Stringer to length and then fit
the end plugs.
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