H-20 load rating for grating?

• Jun 2, 2004

• #2

broekie

Structural

Feb 17, 2004

150

US

If you are looking for an HS-20 truck, the concentrated wheel load is 16 kips.

 

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• Jun 2, 2004

• #3

JedClampett

Structural

Aug 13, 2002

4,031

US

I have some catalogue information relating the truck loading vs. the bearing bar size and spacing. I couldn't find it on line. I could fax it to you. It's only a few pages.
One strange thing about grating loading. An H-15 wheel loading sometimes controls over an H-20 due to its smaller footprint.

 

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• Jun 2, 2004

• #4

SlideRuleEra

Structural

Jun 2, 2003

5,527

US

Concur with broekie & JedClampett. H-20 loading is also 16 kips per tire (like HS-20). An H-20 truck has 2 axles - 8 kips on the front (4 kips/tire) and 32 kips on the back (16 kips/tire). HS-20 is essentially an H-20 truck pulling a one axle trailier, 32 kips on the trailer axle (16 kips/tire).

Here is a fairly good summary:

http://www.ce.memphis.edu/3121/pdf_notes/notes_06c.pdf

Also you may want to get the free .pdf downloads from the metal grading bar trade association:

http://www.naamm.org/mbg/literature.php

They do not answer your question but have good background information (probably similar to the catalogs you have).

A final thought - be sure to consider banding the grating for your heavy duty application.

 

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• Jun 2, 2004

• Thread starter
• #5

dmedved

Civil/Environmental

Jun 2, 2004

2

US

Thanks everyone for the links and info. It confirms what I found myself. I found that Most heavy duty grating companies will design a grate just from specifying H-20 loading. Good stuff to know though. Thanks again.

Derek Medved

 

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