Bs En 7721 Pdf -

: The testing faces must be made "plane" (perfectly flat) within a tolerance of 0.1 mm over any 100 mm area. If the faces aren't naturally flat, they must be ground down or "capped" with a specific cement/sand mortar.

is a European Standard that has been adopted as a British Standard. Its full title is: "Drainage channels for vehicular and pedestrian areas – Slotted top surfaces and/or gratings – Requirements, testing and marking." bs en 7721 pdf

Compliance with this standard is a crucial part of the CE marking process for masonry units, demonstrating that products meet safety and performance standards. Where to Find the BS EN 772-1 PDF : The testing faces must be made "plane"

: Both the upper and lower platens must be perfectly smooth. The planeness tolerance is restricted to 0.1 mm over any 100 mm span. Its full title is: "Drainage channels for vehicular

This site provides access to international standards.

The standard provides a uniform method for determining the compressive strength of masonry units. It ensures that materials—including clay, calcium silicate, aggregate concrete, and natural stone—meet the quality and performance requirements for safe construction.

The standard governs how these products should perform under load, how they resist corrosion, and how they are marked for end-users.