Prepare a clear drainage enquiry with codes, dimensions, traffic and delivery requirements.
Send the supplier codes where known, channel family, total run lengths, grate type, load specification, required fittings and quantities. Include the delivery postcode, access restrictions and required date. A drawing or marked-up photograph helps explain corners, outlets and levels.
No. The class describes a test-load classification for the drainage assembly, not a simple maximum vehicle weight. The installation position, wheel loads, traffic pattern and surrounding construction matter. Use the specified class and installation detail for the project.
Do not select C250 simply because a site is commercial. Forklift wheels, repeated turning and HGV crossings need a project-specific assessment of loading and installation position. Ask the designer or manufacturer to confirm the complete channel assembly and installation detail.
Matching the nominal width is not enough. Compare internal and overall dimensions, depth, load class, grate fixing, outlet arrangement and end fittings. Check the substitution against the specification; accessories and installation details may change with the family.
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