The Caswick Riser Frame (Patent applied for) blocks the open manhole during construction. It provides a raised, bright, visual warning of the manhole presence and prevents pedestrians or vehicles [...]
The transition from ground level into the manhole chamber on entry and vice versa on exit is a critical part of safe working in a confined space. Most specifications stipulate that the distance [...]
To deter unauthorized access, some clients specify that permanently fixed steps or ladders should not be used. In these situations, authorized access is commonly made by winch or removable [...]
Establishing a healthy and safe working environment for lone workers can be different from organising the health and safety of other employees. It will often be safe to work alone. However, the [...]
Do steps and ladders interfere with flow characteristics in chambers or create an additional risk for material in the flow to aggregate and cause blockages? Are there any tips on minimising such issues?
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It is recommended in EN752 that steps and fixed ladders should not protrude into the flow under normal design flows. Where steps are provided in the side of the channel, recessed toe holes should [...]
What is the design life of steps, ladders and other components? Will they need to be replaced during the service life of the chamber? Will retro-fitted products last as long as those used in the initial build?
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Precast manholes for the UK market have a design life in excess of 100 years in normal conditions of use. In such conditions and when installed in accordance with the manufacturer’s guidelines, [...]
All respectable manufacturers should be able to provide full documentation on request to show how their products have been assessed and provide evidence to demonstrate how the results of such [...]
Are there any risks if using steps or ladders that do not meet the relevant Standards or industry specifications?
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Compliance with the key Product Standards BS EN13101 (Steps) and BS EN14396 (Ladders) should be set as the lowest benchmark of performance. Use of any product failing to meet the minimum [...]
What are the critical performance aspects that steps and ladders need to achieve? Are there any benefits in achieving performance in excess of the Standards’ minimum requirements?
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Steps BS EN13101:2002 Steps for underground man entry chambers. Requirements, marking, testing and evaluation of conformity Steps shall be made from: a) aluminium alloy to EN573:3 designation 6 [...]
Steps BS EN752 : 2017 Drain and sewer systems outside buildings. Sewer system management states Manhole steps should not be used for access / egress in manholes deeper than 3.0m from cover level [...]
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