: Compressive strength is calculated by dividing the maximum failure load by the cross-sectional area of the specimen. www.thenbs.com Where to Access the PDF
The standard defines load classes (A15, B125, C250, D400, E600, and F900) that tell you exactly how much weight a slot drain cover can handle. For example, a D400 cover is required for roads with heavy traffic, while an A15 is sufficient for a garden patio. bs en 7721 pdf
Let us address three frequent errors: