AASHTO H-20 and HS-20 Loadings:
The AASHTO defines H-20 loading as a two-axle truck with a maximum dual-wheel load of 16,000 lbs. HS-20 loading, on the other hand, is attributed to a tractor truck with a tandem axle semi-trailer, also with a dual-wheel load of 16,000 lbs.
AASHTO H-25 and HS-25 Loadings:
In addition to H-20 and HS-20, AASHTO introduces H-25 and HS-25 loadings. H-25 loading pertains to a two-axle truck with a maximum dual-wheel load of 25,000 lbs, while HS-25 loading is associated with a tractor truck with a tandem axle semi-trailer and a dual-wheel load of 25,000 lbs.
FAA Advisory Circular AC 150/5320-6D:
The FAA outlines aircraft loading as 100,000 lbs placed over a 9” x 9” (229 x 229 mm) area, emphasizing the need for robust drainage systems in airport environments.
ADA Guidelines for Gratings:
The Americans with Disabilities Act (ADA) mandates specific guidelines for slot width limitations on gratings in walkways. Elongated slots must be placed longitudinally and perpendicular to the dominant direction of travel for accessibility. Slot width ½ inch (13mm).
Heel Proof Design:
"Heel Proof" design, with slots or perforations less than ¼” (8mm) in width or diameter, ensures safety and compliance with industry standards.
Conclusion: Empowering Your Project with the Right Trench Drain Grates
In the intricate tapestry of infrastructure projects, the right trench drain grates are the unsung heroes. By understanding the nuances of ANSI/ASME and DIN load classes, engineers, architects, and contractors can ensure their projects are equipped to handle the diverse demands of pedestrian, vehicular, and even airport traffic. For tailored solutions and detailed specifications, our team is ready to collaborate on crafting efficient and resilient trench drainage systems that stand the test of time. Contact us today and let's build a foundation for success together.