Page 21 - NORMA WM Drainage Catalogue EN

CONVERSION TABLE, CAPACITY & LOAD RECOMMENDATIONS – CHANNEL & TRENCH DRAINS

Capacity Recommendations – Channel & Trench Drains

Product Size Applications Capacity
Micro Channel™ 3.18 cm Wide* Small Patio Small Capacity NORMACLAMP ® DRAINAGE SOLUTIONS
Mini Channel™ 6.99 cm Wide* Small Pool Deck and Patios Small Capacity
Spee-D Channel 10.16 cm Wide* Pool Decks and Patios Medium Capacity
®
Pro 764 Series Channel 7.62 cm Wide* Patio, Pool Decks and Driveways Small Capacity
Pro 864 Series Channel 12.7 cm Wide* Patio, Pool Decks and Driveways Large Capacity
Pro Series Channel 20.32 cm & 30.48 cm Wide* Patio, Pool Decks and Driveways Large Capacity
Pre-sloped for Driveways, Warehouses, Loading Docks and Larger
Dura Slope™ Trench Drain 15.24 cm Wide* Large Capacity
Commercial Projects
* Dimensions mentioned are orientational. Check the drawings or technical datasheets for exact dimensions.

Load Recommendation Guide – Grates (US Standards)

Class A

• Loads of 1-413 kPa.
• Recommended for pedestrians, bicycles and wheelchair traffic.

Class B

• Loads of 414-1206 kPa.
• Recommended for medium-duty pneumatic tire traffic, cars and light trucks at speeds less than 32 kph.

Class C

• Loads of 1207-2241 kPa.
• Recommended for heavy-duty pneumatic tire forklifts and tractor-trailers at speeds less than 32 kph, H-20 rated.

Class D

• Loads of 2242-3965 kPa.
• Recommended for heavy-duty hard tire forklifts at speeds less than 32 kph, H-20 rated.

Notes: Some installations may require a concrete collar to meet load rating. Load ratings are based on encasing product in concrete.
Product must be installed using NDS instructions.
Cast iron grates will oxidize over time and rust, forming an iron-oxide patina. The iron-oxide layer begins red-orange in color and
ages to a deep, rich brown. This patina is tightly adhered and protects the iron beneath it from further oxidation. Iron grates with a
rust patina are structurally sound and will last for decades.

Imperial to Metric Conversion Table

Imperial Metric
1’ (foot) 0.30 m (meter)
1” (inch) 2.54 cm (centimeter)
1 PSI (pound per square inch) 6.895 kPa
1 gpm (gallon per minute) 3.785 lpm (liters per minute)
1 square inch 6.45 square centimeters

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