HA 104 is a specification that sets out procedures and defines materials for the best possible performance of manholes and gullies when being installed and maintained on roads. Originally developed by the Highways Agency in 2002 it has now been adopted by DRD Roads Service, National Roads Authority and the Department of Transport. The specification applies to all classifications of roads throughout Ireland.
Research has shown that premature failure in the bedding material is one of the main factors contributing to poor performance of chamber tops and gully top installations. It has been shown that conventional materials, procedures and material specifications have become superseded by more recent product developments, and results of research have led to an improved specification for the bedding material; HA 104.
With an ever increasing awareness of the need to ensure work is carried out to the best possible performance and to reduce the need to go back and reinstate collapsed road furniture, the HA introduced a specification benchmark for local authorities to work from.
Yes, the DRD Roads Service adopted HA 104 in August 2002 and it is to be applied to all roads including, motorways, dual carriageways, trunk roads, A and B class roads.
Yes, the National Roads Authority adopted HA 104 in October 2009 and it is to be applied to all national roads including, motorways, dual carriageways and trunk roads. In December 2010 the Department of Transport adopted HA 104 for all regional roads and works carried out by City and County Councils.
By using a bedding mortar that meets the requirements set out in chapter 6 of the specification. Emtek’s Envirobed HA104 is the new generation high performance mortar that has been developed in line with this, ensuring that you gain the most effective and durable ironwork reinstatements that can be easily applied and quickly re-opened to traffic.
Step 1 – Break out the failed ironwork
Step 2 – Prepare the chamber area
Step 3 – Check levels
Step 4 – Mix HA 104 compliant Bedding Mortar
Step 5 – Apply HA 104 compliant Bedding Mortar to chamber
Step 6 – Place manhole frame on HA 104 compliant Bedding
Mortar and tamp level
Step 7 – After 15 minutes the HA 104 compliant Mortar has
Step 8 – Apply suitable backfill & prepare wearing course
Step 9 – Compact the appropriate wearing course and open