DGHT0D6/4242/KHPHighway D400 3 flange pedestrian friendly gully grate 425mm x 425mm clear opening with 150mm frame depth
Features
SpecificationGeneral information
Standards, classes and groupings
Dimensions
EPD Data
Accessories
NotesThe D400 load capability of these Group 3 products also offers the benefit of making them suitable for exposure to Group 4 traffic types. Where 3-flange D400 Gully Grate assemblies are employed, we recommend that they are installed against a kerb, not in an open highway location Fully compliant with the requirements of specification clause 6.2.47 of Cycle Infrastructure Design Local Transport Note 1/20. Knowledge base
Knowledge Base / Standards and conformity CD 526 hydraulic capacity classifications A guide to the ‘P, Q, R, S & T,’ ratings are classifications listed in Highways England DMRB document CD 526 and how they are calculated to indicate a gully grating’s hydraulic capacity (or effectiveness at evacuating water from a hard standing area. e.g. carriageway). 
Knowledge Base / Standards and conformity Understanding BS EN 124 groups and classes BS EN 124:2015 divides access covers and gully grates into classes by static test load. It also categorises the various places where they may be installed from Group 1 to Group 6. This article will guide you through the groups and classes. 
Knowledge Base / Standards and conformity Sewers for adoption Sewers for Adoption (7th edition) contains guidance for the design and construction of sewers that will be adopted by Sewerage Undertakers in England and Wales in accordance with Section 104 of the Water Industry Act 1991. This helpful guide will take you through what you need to know. 
Knowledge Base / Product and specification guidance Pedestrian and cycle friendly gully gratings Whilst BS EN 124 provides no definition for a ‘Pedestrianised’ grating, there is an allowance in the Standard to reduce drainage apertures down to 5mm wide, where these may be preferred. This knowledge base article will help you to understand more about pedestrian friendly gratings. 
Knowledge Base / Product and specification guidance ID badging and antenna options (RFID, NFC, IoT) A large number of our Unite and Highway covers provide the facility for a retrofittable badge to be installed in the cover, without the need for welding. In addition, this location can also be used to install communications antennas within the cover, removing the need to adjust the surrounding road surface. This article discusses the potential applications of this technology. 
Knowledge Base / Product and specification guidance On-site coating of ductile cast iron parts Where the loss of barrier coatings has occurred, usually through trafficking and/or light corrosion, a site-applied paint coating may be successfully brush-applied to refresh the surface finish of ductile iron parts. 
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