Load Class Ratings
To determine the safe load-carrying capacity of industrial floor drains, manufacturers adhere to industry-standard specifications, including ASME A112.6.3/CSA B79.3 and DIN EN 1433. These standards are the most common in the industry and are used to classify a drain’s load rating through laboratory-based static testing.
Understanding these classifications is crucial for selecting the appropriate drain for heavy-duty applications and for managing wastewater effectively. The various load classifications for these standards are detailed in the table below.
Understanding Load Classifcations
| ASME A112.6.3 / CSA B79.3 | DIN EN 1433 |
|---|---|
| LD – Light Duty Up to 441 lb (200 kg) |
Load Class A Up to 3,372 lb (15 kN) |
| MD – Medium Duty Up to 1,984 lb (900 kg) |
Load Class B Up to 28,101 lb (125 kN) |
| HD – Heavy Duty Up to 3,638 lb (1,650 kg) |
Load Class C Up to 56,202 lb (250 kN) |
| XHD – Extra Heavy Duty Up to 7,500 lb (3,402 kg) |
Load Class D Up to 89,923 lb (400 kN) |
| SD – Special Duty Up to 10,000 lb (4,536 kg) |
Load Class E Up to 134,885 lb (600 kN) |
| — | Load Class F Up to 202,328 lb (900 kN) |
ASME A112.6.8/CSA B79.8
This standard outlines the design and performance criteria for trench drains and grate systems utilized within or around non-residential buildings. It references ASME A112.6.3/CSA B79.3 for load test procedures.
ASME A112.6.3/CSA B79.3
This standard details the design and performance requirements for floor drains and area drains that are used within and near building structures. Although this standard covers floor drains and area drains only, the trench drain standard ASME A112.6.8/CSA B79.8, relies on this specification for load test procedures.
DIN EN 1433
This drain standard is an European standard. This test standard is one of the few that was specifically written for trench drains.
AASHT0 M 306-10
This specification applies to frames, grates, rings, and covers for inlets and manholes used in civil applications, particularly in traffic areas where load bearing is crucial. It also establishes static load test requirements comparable to those previously mentioned.
FAA AC: 150 / 5320-6D
This standard is used for drains in aviation work and sea ports.
ADA Grating Guidelines:
The Americans with Disabilities Act (ADA) requires that gratings in walkways adhere to specific slot width limitations. Slots must be positioned longitudinally and perpendicular to the main direction of travel to ensure accessibility. The maximum slot width is ½ inch (13mm).
Heel-Proof Design:
A heel-proof drain grate, designed to prevent debris accumulation and ensure pedestrian safety (particularly for high heels), features slots or perforations smaller than 0.313 inches (8 mm).
Questions?
Our team of experts are here to help.