DGHT0D4/4242/KH

Frequently asked question questions about our ductile iron access cover range of products.

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).

The complete operation and maintenance (O&M) manual for all Wrekin BS EN 124 ironwork.

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.

Guidance on the symbols and iconography displayed on Wrekin ductile ironwork.

A handy guide showing the information on our product labels. This information will help you identify what products you have when picking, packing or installing on-site.

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.

Learn how to accurately measure manhole covers and gully grates with our helpful guide.

A helpful video showing you how to swap the hinge direction on our reversible gully grates.

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.

Helpful information that guides you through applicable conformity marking and voluntary third-party certification requirements in the UK.

Guidance on surface oxidation on iron castings, including what our covers are coated with and why we do this.

A comprehensive feature comparison of our market leading Tristar, Highway and Unite ranges of access cover.

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.

All of our products are packed full of features to make them best in class. This knowledge article explains the features and their benefits in detail.

Clear opening is a critical safety and compliance measure for manhole covers and gully gratings. It is defined by BS EN 124 as the largest circular area that can be inscribed within the frame opening.