CD534

The CD534 Range from Thomas Dudley Utility Products has been designed to stand the test of time in high traffic conditions and with the requirements of Highways England’s technical regulation, CD534, at the forefront of our specification.

The CD534 regulation was introduced back in February 2020, as a replacement for the HA104/09 guidance notes, with the intention of guiding installers to the best possible product specifications for installation in trunk roads and motorways.

Our CD534 Range has been designed to conform to and in many instances exceed the requirements of both EN124-2 and CD534, the products are also Kitemarked to provide additional peace of mind.

Here is a list of key product features and how they perform against the requirements of CD534 –

• Skid resistance value of 78 PSRV – Our tread pattern has been independently tested and this figure vastly exceeds the CD534 minimum requirement of all Group 4 chamber tops to have a PSRV >60 when installed in high risk locations.
• Minimum flange area for frames – Providing a bearing pressure under 2.1 N/mm² all of our CD534 range products meet the minimum flange area for D400 and E600 frames. We believe that the lower bearing pressure is key to dispersing stresses and thus reducing the potential damage on bedding materials, especially in high traffic installations and have ensured that our products still meets this specification.
• D400 & E600 load class – CD534 now states that E600 covers should be used in ALL environments where the annual average daily traffic of large goods vehicles exceeds 1500 in each direction.
• Minimum clear opening of 600 x 600 – For chamber tops permitting access, CD534 requires a minimum of 600mm clear opening.
• 150mm frame depth available – CD534 states a minimum frame depth of 150mm for all motorways and all-purpose trunk roads.
  80mm depth of insertion – This meets the CD534 minimum depth of insertion of 80mm.
• M16 coupling bolts – Exceeding the CD534 requirement of 140mm² minimum cross sectional area of loose couplings.
• Minimum frame weight – For 600×600 and 675×675 sizes, all of our range meet the minimum weight requirements for frames